Peer-review publications


  1. Miyake, F., Usoskin, I. and Poluianov, S. (eds.), Extreme Solar Particle Storms, IOP Publishing, 2019, doi: 10.1088/2514-3433/ab404a


  1. Larsen, N., & Mishev, A. (2024). Relationship between NM data and radiation dose at aviation altitudes during GLE events. Space Weather, 22, e2024SW003885.
  2. Hayakawa, H., S. Koldobskiy, A. Mishev, S. Poluianov, A. Gil, I. Usoskina, I. Usoskin (2024) Revision of the strongest solar energetic particle event of 23 February 1956 (GLE #5) based on the rediscovered original records, Astron. Astrophys., 684, A46, doi: 10.1051/0004-6361/202348699.
  3. Uusitalo, J., Golubenko, K., Arppe, L., Brehm, N., Hackman, T., Hayakawa, H., et al. (2024). Transient offset in 14C after the Carrington event recorded by polar tree rings. Geophysical Research Letters, 51, e2023GL106632. doi: 10.1029/2023GL106632
  4. Mishev, A.L., Koldobskiy, S.A., Larsen, N., I. Usoskin (2024) Spectra and Anisotropy of Solar Energetic Protons During GLE #65 on 28 October, 2003 and GLE #66 on 29 October, 2003. Sol Phys 299, 24. doi: 10.1007/s11207-024-02269-z
  5. Borthakur, M., M. Sinnhuber, A. Laeng, T. Reddmann, P. Braesicke, G. Stiller, T. Clarmann, B. Funke, I. Usoskin, J. Wissing, O. Yakovchuk (2024). Determining the Impact of Chlorine Ion Chemistry on Ozone Loss in the Middle Atmosphere during Very Large Solar Proton Events. Emerging Issues in Env., Geogr. Earth Sci., 7, 1–40, doi: 10.9734/bpi/eieges/v7/7247C
  6. Funke, B., T. Dudok de Wit, I. Ermolli, M. Haberreiter, D. Kinnison, D. Marsh, H. Nesse, A. Seppälä, M. Sinnhuber, I. Usoskin (2024) Towards the definition of a solar forcing dataset for CMIP7, Geosci. Mod. Dev., 17, 1217, doi: 10.5194/gmd-17-1217-2024.
  7. Poluianov, S., O. Batalla, A. Mishev, S. Koldobskiy, I. Usoskin (2024) Two New Sub-GLEs Found in Data of Neutron Monitors at South Pole and Vostok: On 09 June 1968 and 27 February 1969. Sol Phys 299, 6. Doi: 10.1007/s11207-023-02245-z.
  8. Owens, M., M. Lockwood, L. Barnard, I. Usoskin, H. Hayakawa, B. Pope, K. McCracken (2024) Reconstructing Sunspot Number by Forward-Modelling Open Solar Flux, Solar Phys., 299, 3, doi: 10.1007/s11207-023-02241-3.


  1. Kocharov, L., A. Mishev, E. Riihonen, R. Vainio, I. Usoskin (2023) A Comparative Study of Ground-level Enhancement Events of Solar Energetic Particles, Astrophys. J., 958, 122, doi: 10.3847/1538-4357/acfee8
  2. Koldobskiy, S., F. Mekhaldi, G. Kovaltsov, I. Usoskin (2023) Multiproxy Reconstructions of Integral Energy Spectra for Extreme Solar Particle Events of 7176 BCE, 660 BCE, 775 CE, and 994 CE, J. Geophys. Res. (Space Phys.), 128, e2022JA031186 (2023) doi: 10.1029/2022JA031186.
  3. Usoskin, I., Miyake, F., Baroni, M. et al., Extreme Solar Events: Setting up a Paradigm. Space Sci. Rev. 219, 73 (2023) doi: 10.1007/s11214-023-01018-1.
  4. Aguilar, M. et al. (2023) Temporal Structures in Positron Spectra and Charge-Sign Effects in Galactic Cosmic Rays, Phys. Rev. Lett., 131, 151002. doi:10.1103/PhysRevLett.131.151002.
  5. Norton, A., R. Howe, L. Upton, I. Usoskin (2023) Solar Cycle Observations. Space Sci Rev 219, 64. doi:10.1007/s11214-023-01008-3.
  6. Borthakur, M., M. Sinnhuber, A. Laeng, T. Reddmann, P. Braesicke, G. Stiller, T. von Clarmann, B. Funke, I. Usoskin, J.M. Wissing, O. Yakovchuk (2023) Impact of chlorine ion chemistry on ozone loss in the middle atmosphere during very large solar proton events, Atmos. Chem. Phys., 23, 12985-13013, doi: 10.5194/acp-23-12985-2023.
  7. Similä, M., I. Usoskin (2022). Solar cycles reconstructed over the last millennium: Do Waldmeier and Gnevysev-Ohl rules work? Proc. IAU, 18(S372), 70-75. doi:10.1017/S1743921323000236
  8. N. Larsen, A. Mishev Analysis of the Ground Level Enhancement GLE 60 on 15 April 2001, and Its Space Weather Effects: Comparison With Dosimetric Measurements Space Weather 21(8), e2023SW003488, 2023
  9. Mishev, A., S. Panovska, I. Usoskin (2023) Assessment of the radiation risk at flight altitudes for an extreme solar particle storm of 774 AD, J. Space Weather Space Clim., 13, 22, doi: 10.1051/swsc/2023020
  10. Dash, S., D. Nandy, I. Usoskin (2023) Long-term forcing of the Sun’s coronal field, open flux, and cosmic ray modulation potential during grand minima, maxima, and regular activity phases by the solar dynamo mechanism, Mon. Not. Royal Astron. Soc., 525, 4801–4814, doi: 10.1093/mnras/stad1807
  11. Nandy, D., Banerjee, D., Bhowmik, P., Brun, A. S., Cameron, R. H., Gibson, S. E., … Usoskin, I. G. (2023). Exploring the Solar Poles: The Last Great Frontier of the Sun. Bulletin of the AAS, 55(3). Doi: 10.3847/25c2cfeb.1160b0ef
  12. Panovska, S., S. Poluianov, J. Gao, M. Korte, A. Mishev, Y. Shprits, I. Usoskin. Effects of Global Geomagnetic Field Variations Over the Past 100,000 Years on Cosmogenic Radionuclide Production Rates in the Earth’s Atmosphere. J. Geophys. Res.: Space Phys., 128(8), e2022JA031158 (2023) doi: 10.1029/2022JA031158.
  13. Reddmann, Th., M. Sinnhuber, J. Wissing, O. Yakovchuk, and I. Usoskin, The impact of an extreme solar event on the middle atmosphere: a case study, Atmos. Chem. Phys., 23, 6989–7000 (2023), doi: 10.5194/acp-23-6989-2023
  14. Aguilar, M. et al. (AMS Collab.) Properties of Cosmic-Ray Sulfur and Determination of the Composition of Primary Cosmic-Ray Carbon, Neon, Magnesium, and Sulfur: Ten-Year Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 130, 211002 (2023) doi:10.1103/PhysRevLett.130.211002.
  15. A.L. Mishev, S. Kodaira, H. Kitamura, O. Ploc, I. Ambrožová, R.V. Tolochek, I.S. Kartsev, V.A. Shurshakov, A.A. Artamonov, K.O. Inozemtsev, Radiation environment in high-altitude Antarctic plateau: Recent measurements and model studies, Science of The Total Environment, Volume 890, 2023, 164304, ISSN 0048-9697, doi:10.1016/j.scitotenv.2023.164304.
  16. Usoskin, I.G., A history of solar activity over millennia, Liv. Rev Solar Phys., 20, 2 (2023) doi: 10.1007/s41116-023-00036-z
  17. Aguilar, M.,… S. Poluianov,… I. Usoskin et al. (AMS collaboration), Temporal Structures in Electron Spectra and Charge Sign Effects in Galactic Cosmic Rays, Phys. Rev. Lett., 130, 161001, 2023 doi:10.1103/PhysRevLett.130.161001.
  18. Väisänen, P., I. Usoskin, R. Kähkönen, S. Koldobskiy, K. Mursula, Revised Reconstruction of the Heliospheric Modulation Potential for 1964-2022, J. Geophys. Res. (Space Phys.) 128, e2023JA031352 (2023) doi: 10.1029/2023JA031352.
  19. Clette, F., L. Lefèvre, T. Chatzistergos, H. Hayakawa, V.M.S. Carrasco, R. Arlt, E.W. Cliver, T. Dudok de Wit, T.K. Friedli, N. Karachik, G. Kopp, M. Lockwood, S. Mathieu, A. Muñoz-Jaramillo, M. Owens, D. Pesnell, A. Pevtsov, L. Svalgaard, I.G. Usoskin, L. van Driel-Gesztelyi, J.M. Vaquero, Recalibration of the Sunspot-Number: Status Report, Solar Phys. 298, 44, (2023) doi: 10.1007/s11207-023-02136-3.
  20. Biswas, A., B.B. Karak, I. Usoskin, E. Weisshaar, Long-Term Modulation of Solar Cycles, Space Sci. Rev., 219, 19 (2023) doi: 10.1007/s11214-023-00968-w.
  21. Larsen, N., A. Mishev, I. Usoskin, A new open-source Geomagnetosphere Propagation Tool (OTSO) and its Applications, J. Geophys. Res. (Space Phys.), 128, e2022JA031061 (2023) doi: 10.1029/2022JA031061.
  22. Usoskin, I.G., S.A. Koldobskiy, S.V. Poluianov, O. Raukunen, R. Vainio, G.A. Kovaltsov, Consistency of the average flux of solar energetic particles over timescales of years to megayears, Astron. Astrophys. Lett., 670, L22 (2023), doi: 10.1051/0004-6361/202245810.
  23. A.L. Mishev, Application of the global neutron monitor network for assessment of spectra and anisotropy and the related terrestrial effects of strong SEPs, Journal of Atmospheric and Solar-Terrestrial Physics, Volume 243, 2023, 106021, ISSN 1364-6826, doi:10.1016/j.jastp.2023.106021.


  1. Vasilyev, V., T. Reinhold, A.I. Shapiro, N.A. Krivova, I. Usoskin, B.T. Monte, S.K. Solanki, L. Gizon, Superflares on solar-like stars A new method for identifying the true flare sources in photometric surveys, Astron. Astrophys., 668, A167 (2022), doi: 10.1051/0004-6361/202244422.
  2. Tanaka, H.K.M., Gluyas, J., Holma, M., Usoskin I., Poluianov S., et al. Atmospheric muography for imaging and monitoring tropic cyclones. Sci Rep 12, 16710 (2022). Doi: 10.1038/s41598-022-20039-4.
  3. Sergey Koldobskiy, Alexander Mishev, Fluences of solar energetic particles for last three GLE events: Comparison of different reconstruction methods, Advances in Space Research, Volume 70, Issue 9, 2022, Pages 2585-2592, doi: 10.1016/j.asr.2021.11.032.
  4. Lev I. Dorman, Peter I.Y. Velinov, Alexander Mishev, Global planetary ionization maps in Regener-Pfotzer cosmic ray maximum for GLE 66 during magnetic superstorm of 29–31 October 2003, Advances in Space Research, Volume 70, Issue 9, 2022, Pages 2593-2601, doi: 10.1016/j.asr.2022.01.032.
  5. Stepan Poluianov, Oscar Batalla, Cosmic-ray atmospheric cutoff energies of polar neutron monitors, Advances in Space Research, Volume 70, Issue 9, 2022, Pages 2610-2617,doi: 10.1016/j.asr.2022.03.037.
  6. Agnieszka Gil, Alexander Mishev, Stepan Poluianov, Ilya Usoskin, Diurnal anisotropy of polar neutron monitors: Dome C looks poleward, Advances in Space Research, Volume 70, Issue 9, 2022, Pages 2618-2624, doi: 10.1016/j.asr.2021.12.010.
  7. Raukunen, O, I. Usoskin, S. Koldobskiy, G. Kovaltsov, R. Vainio, Annual integral solar proton fluences for 1984–2019, Astron. Astrophys., 665, A65, 2022, doi: 10.1051/0004-6361/202243736.
  8. Alexander Mishev. Ionization Effect in the Earth’s Atmosphere during the GLE # 71 on 17 May 2012. Space Research Today vol. 214, p 31-34, 2022.
  9. Owens, M.J., L.A. Barnard, B.J.S. Pope, M. Lockwood, I. Usoskin, E. Asvestari, Solar Energetic-Particle Ground-Level Enhancements and the Solar Cycle, Solar Phys., 297, 105, 2022. Doi: 10.1007/s11207-022-02037-x.
  10. K. Golubenko, E. Rozanov, G. Kovaltsov, I. Usoskin, Zonal mean distribution of cosmogenic isotope (7Be, 10Be, 14C and 36Cl) production in stratosphere and troposphere. JGR: Atm., 2022, doi: 10.1029/2022JD036726.
  11. Trzaska, W., Barzilov, A., Enqvist, T., Jedrzejczak, K., Joutsenvaara, J., Kasztelan, M., Kotavaara, O., Kuusiniemi, P., Loo, K., Orzechowski, J., Puputti, J., Slupecki, M., Szabelski, J., Usoskin, I., Ward, T., NEMESIS setup for Indirect Detection of WIMPs, Nucl. Inst. Meth. Phys. Res. A, 1040, 167223, 2022. doi: 10.1016/j.nima.2022.167223
  12. Mishev, A.L. L.G. Kocharov, S.A. Koldobskiy, N. Larsen, E. Riihonen, R. Vainio, I.G. Usoskin, High-Resolution Spectral and Anisotropy Characteristics of Solar Protons During the GLE No.73 on 28 October 2021 Derived with Neutron-Monitor Data Analysis, Solar Phys. 297, 88, 2022, doi: 10.1007/s11207-022-02026-0
  13. Leppänen, A.-P., S. Poluainov, The impact of different atmospheric phenomena to cosmogenic 22 Na/ 7 Be ratio, Journal of Atmospheric and Solar-Terrestrial Physics, 236, 105918, 2022, doi: 10.1016/j.jastp.2022.105918
  14. Pearson, C., S. Leavitt, B. Kromer, S. Solanki, I. Usoskin, Dendrochronology, and radiocarbon dating. Radiocarbon, 64(3), 569-588 2022, doi:10.1017/RDC.2021.97
  15. M. Aguilar, I.G. Usoskin, S. Poluianov et al. (AMS Collaboration) Properties of Daily Helium Fluxes, Phys. Rev. Lett. 128, 231102, 2022, doi: 10.1103/PhysRevLett.128.231102.
  16. A. Mishev and P. Velinov, “Global Maps of Galactic Cosmic Ray Induced Ionization at Different Altitudes in Planetary Atmosphere”, C. R. Acad. Bulg. Sci. , vol. 75, no. 5, pp. 700–708, May 2022.
  17. Cliver, E.W., C.J. Schrijver, K. Shibata, I.G. Usoskin, Extreme solar events. Living Rev Sol Phys 19, 2 (2022). doi: 10.1007/s41116-022-00033-8.
  18. Makrantoni, P., A. Tezari, A. Stassinakis, P. Paschalis, M. Gerontidou, P. Karaiskos, A. Georgakilas, H. Mavromichalaki, I. Usoskin, N. Crosby, M. Dierckxsens. Estimation of Cosmic-Ray-Induced Atmospheric Ionization and Radiation at Commercial Aviation Flight Altitudes. Appl. Sci., 12, 5297 (2022) doi: 10.3390/app12115297.
  19. A. Mishev, A. Binios, E. Turunen, A.-P. Leppänen, N. Larsen, E. Tanskanen, I. Usoskin, J. Envall, T. Iinatti, P. Lakkala, Measurements of natural radiation with an MDU Liulin type device at ground and in the atmosphere at various conditions in the Arctic region, Radiation Measurements, Vol. 154, 2022, 106757, ISSN 1350-4487, doi:10.1016/j.radmeas.2022.106757.
  20. Papaioannou, A., A. Kouloumvakos, A. Mishev, R. Vainio, I. Usoskin, K. Herbst, A. P. Rouillard, A. Anastasiadis, J. Gieseler, R. Wimmer-Schweingruber, P. Kühl, The first ground-level enhancement of solar cycle 25 on 28 October 2021, Astron. Astrophys., 660, L5 (2022) doi: 10.1051/0004-6361/202142855
  21. Koldobskiy, S.A., R. Kähkönen, B. Hofer, N.A. Krivova, G.A. Kovaltsov, I.G. Usoskin, Time Lag Between Cosmic-Ray and Solar Variability: Sunspot Numbers and Open Solar Magnetic Flux, Solar Phys., 297, 38 (2022) doi: 10.1007/s11207-022-01970-1
  22. Brehm, N., Christl, M., … Usoskin, I., Wacker, L., Tree-rings reveal two strong solar proton events in 7176 and 5259 BCE. Nat Commun 13, 1196 (2022) doi: 10.1038/s41467-022-28804-9.
  23. Susanna Pätsi and Alexander Mishev. Ionization effect in the Earth’s atmosphere due to cosmic rays during the GLE # 71 on 17 May 2012, Advances in Space Research, Volume 69, Issue 7, 2022, Pages 2893-2901, ISSN 0273-1177, doi:10.1016/j.asr.2022.02.008.
  24. Trzaska, W., Enqvist,T., Jedrzejczak,K., Joutsenvaara,J., Kasztelan,M., Kotavaara, O., Kuusiniemi, P., Loo, K., Orzechowski, J., Puputti, J., Slupecki, M., Szabelski, J., Usoskin, I., Warda, T. DM-like anomalies in neutron multiplicity spectra, J. Phys.: Conf. Ser 2156, 012029 (2021).
  25. N. Marcelli, Koldobskiy, S. et al. Helium Fluxes Measured by the PAMELA Experiment from the Minimum to the Maximum Solar Activity for Solar Cycle 24 2022 ApJL 925 L24 doi:10.3847/2041-8213/ac4787
  26. Koldobskiy, S., I. Usoskin, and G.A. Kovaltsov, Effective energy of cosmogenic isotope (10Be, 14C and 36Cl) production by solar energetic particles and galactic cosmic rays, J. Geophys. Res. Space Phys., 127, e2021JA029919 (2022) doi: 10.1029/2021JA029919.


  1. Aguilar, M. et al. (AMS collaboration), Periodicities in the Daily Proton Fluxes from 2011 to 2019 Measured by the Alpha Magnetic Spectrometer on the International Space Station from 1 to 100 GV, Phys. Rev. Lett., 127, 271102 (2021), doi: 10.1103/PhysRevLett.127.271102.
  2. Mironova, I.; Kovaltsov, G.; Mishev, A.; Artamonov, A. Ionization in the Earth’s Atmosphere Due to Isotropic Energetic Electron Precipitation: Ion Production and Primary Electron Spectra. Remote Sens. 2021, 13, 4161. doi:10.3390/rs13204161.
  3. S. Koldobskiy, M. Kachelrieß, A. Lskavyan, A. Neronov, S. Ostapchenko, and D.V. Semikoz Energy spectra of secondaries in proton-proton interactions Phys. Rev. D 104, doi:10.1103/PhysRevD.104.123027.
  4. Bruno, A. …… Koldobskiy, S. et al. (2021). East–West Proton Flux Anisotropy Observed with the PAMELA Mission. The Astrophysical Journal, 919, doi:10.3847/1538-4357/ac1677.
  5. Bruno, A. …… Koldobskiy, S. et al. (2021). Solar-cycle Variations of South Atlantic Anomaly Proton Intensities Measured with the PAMELA Mission. The Astrophysical Journal Letters, 917, doi:10.3847/2041-8213/ac1a74.
  6. Koldobskiy, S., Neronov, A.,Semikoz D. (2021). Pion decay model of the Tibet-ASγ PeV gamma-ray signal. Phys. Rev. D, 104, doi:10.1103/PhysRevD.104.043010.
  7. Usoskin, I. G., & Kovaltsov, G. A. (2021). Mind the gap: New precise 14C data indicate the nature of extreme solar particle events. Geophysical Research Letters, 48, e2021GL094848. doi:10.1029/2021GL094848
  8. Mishev, A., Poluianov, S. About the Altitude Profile of the Atmospheric Cut-Off of Cosmic Rays: New Revised Assessment. Solar Physics, 296 (8), 2021, doi: 10.1007/s11207-021-01875-5.
  9. Aguilar, M. … I.G. Usoskin and S. Poluianov et al. (AMS collaboration), Properties of a New Group of Cosmic Nuclei: Results from the Alpha Magnetic Spectrometer on Sodium, Aluminum, and Nitrogen, Phys. Rev. Lett., 127, 021101 (2021), doi: 10.1103/PhysRevLett.127.021101.
  10. Velinov, Peter I. Y.; Mishev, Alexander (2021) Influence of forbush effect on atmospheric ionization due to solar energtic particles. Comptes rendus de l’Académie bulgare des Sciences 74(6): 868-878.
  11. Kocharov, L., N. Omodei, A. Mishev, M. Pesce-Rollins, F. Longo, S. Yu, D.E. Gary, R. Vainio, I. Usoskin, Multiple Sources of Solar High-energy Protons, Astrophys. J., 915, 12 (2021) doi: 10.3847/1538-4357/abff57
  12. Krivova, N.A., S.K.  Solanki, B. Hofer, C.-J. Wu, I.G. Usoskin, R. Cameron, Modelling the evolution of the Sun’s open and total magnetic flux, Astron. Astrophys., 650 A70 (2021) doi: 10.1051/0004-6361/202140504
  13. Usoskin, I.G., S.K. Solanki, N.A. Krivova, B. Hofer, G A. Kovaltsov, L. Wacker, N. Brehm and B. Kromer, Solar cyclic activity over the last millennium reconstructed from annual 14C data, Astron. Astrophys., 649, A141 (2021) doi: 10.1051/0004-6361/202140711
  14. Mishev, A.L., Koldobskiy, S.A., Kocharov, L.G. et al. GLE # 67 Event on 2 November 2003: An Analysis of the Spectral and Anisotropy Characteristics Using Verified Yield Function and Detrended Neutron Monitor Data. Sol Phys 296, 79 (2021).
  15. Väisänen, P., I. Usoskin, and K. Mursula, Seven decades of neutron monitors (1951-2019): Overview and evaluation of data sources. J. Geophys. Res. Space Phys., 126, e2020JA028941, 2021. doi: 10.1029/2020JA028941
  16. Similä, M., I. Usoskin, S. Poluianov, A. Mishev, G.A. Kovaltsov, D. Strauss, High-Altitude Polar NM With the New DAQ System as a Tool to Study Details of the Cosmic-Ray Induced Nucleonic Cascade, J. Geophys. Res. Space Phys., 126, e2020JA028959, 2021, doi: 10.1029/2020JA028959.
  17. Golubenko, K., Rozanov, E., Kovaltsov, G., Leppänen, A.-P., Sukhodolov, T., and Usoskin, I.: Application of CCM SOCOL-AERv2-BE to cosmogenic beryllium isotopes: description and validation for polar regions, Geosci. Model Dev., 14, 7605–7620, 2021
  18. Koldobskiy, S., O. Raukunen, R. Vainio, G.A. Kovaltsov, I. Usoskin, New reconstruction of event-integrated spectra (spectral fluences) for major solar energetic particle events, Astron. Astrophys. 647, A132, 2021, doi: 10.1051/0004-6361/202040058
  19. Mishev, A.L., S.A. Koldobskiy, I.G. Usoskin, L.G. Kocharov and G.A. Kovaltsov, Application of the Verified Neutron Monitor Yield Function for an Extended Analysis of the GLE # 71 on 17 May 2012, Space Weather, 19, e2020SW002626 (2021), doi: 10.1029/2020SW002626
  20. Aguilar, M. … S. PoluianovI. Usoskin .. et al. (AMS Collaboration), Properties of Heavy Secondary Fluorine Cosmic Rays: Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 126, 081102, 2021, doi: 10.1103/PhysRevLett.126.081102.
  21. Aguilar, M…. S. PoluianovI. Usoskin… et al. (AMS collaboration), The Alpha Magnetic Spectrometer (AMS) on the international space station: Part II— Results from the first seven years, Phys. Rep., 894, 1-116, 2021, doi: 10.1016/j.physrep.2020.09.003
  22. Aguilar, M. et al. (AMS Collaboration), Properties of Iron Primary Cosmic Rays: Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 126, 041104, 2021, doi: 10.1103/PhysRevLett.126.041104.
  23. Usoskin, I.G., G.A. Kovaltsov, W. Kiviaho, Robustness of Solar-Cycle Empirical Rules Across Different Series Including an Updated Active-Day Fraction (ADF) Sunspot Group Series, Solar Phys., 296, 13, 2021. Doi: 10.1007/s11207-020-01750-9
  24. Brehm, N., Bayliss, A., Christl, M., Synal, H., Adolphi, F., Beer, J, Kromer, B., Muscheler, R., Solanki, S.K., Usoskin, I., Bleicher, N., Bollhalder, S., Tyers, C. Wacker, L. Eleven-year solar cycles over the last millennium revealed by radiocarbon in tree rings. Nat. Geosci. (2021). doi:10.1038/s41561-020-00674-0


  1. Terrasi, F., F. Marzaioli, R. Buompane, I. Passariello, G. Porzio, M. Capano, M., S Helama, M. Oinonen, P. Nöjd, J. Uusitalo, A.J.T. Jull, I.P. Panyushkina, C. Baisan, M. Molnar, T. Varga, G., S. Poluianov, I. Usoskin, Can the 14C production in 1055 CE be affected by SN1054? Radiocarbon, 62(5), 1403-1418, 2020. doi:10.1017/RDC.2020.58.
  2. Mishev, A.L., S.A. Koldobskiy, I.G. Usoskin, L.G. Kocharov and G.A. Kovaltsov, Application of the Verified Neutron Monitor Yield Function for an Extended Analysis of the GLE # 71 on 17 May 2012, Space Weather, 19, e2020SW002626 (2021), doi: 10.1029/2020SW002626
  3. A. Mishev and P.I.Y. Velinov Ionization effect in the Earth’s atmosphere during the sequence of October–November 2003 Halloween GLE events JASTP, Volume 211, December 2020, 105484
  4. Poluianov, S.V., G.A. Kovaltsov, I.G. Usoskin, A new full 3-D model of cosmogenic tritium 3H production in the atmosphere (CRAC:3H). J Geophys. Res. Atmos., 125, e2020JD033147, 2020. doi: 10.1029/2020JD033147
  5. Strauss, D. T., S. Poluianov, C. van der Merwe, H. Krüger, C. Diedericks, H. Krüger, I. Usoskin, B. Heber et al., The mini-neutron monitor: a new approach in neutron monitor design, J. Space Weather Space Clim., 10, 39, 2020, doi: 10.1051/swsc/2020038.
  6. Usoskin, I., S. Koldobskiy, G.A. Kovaltsov, A. Gil, I. Usoskina, T. Willamo and A. Ibragimov, Revised GLE database: Fluences of solar energetic particles as measured by the neutron-monitor network since 1956, Astron. Astrophys., 640, A17, 2020, doi; 10.1051/0004-6361/202038272.
  7. Golubenko, K., E. Rozanov, I. Mironova, A. Karagodin, I. Usoskin, Natural Sources of Ionization and Their Impact on Atmospheric Electricity, Geophys. Res. Lett., 47, e2020GL088619, doi: 10.1029/2020GL088619.
  8. Usoskin, I.G., S.A. Koldobskiy, G.A. Kovaltsov, E.V. Rozanov, T.V. Sukhodolov, A.L. Mishev, I.A. Mironova, Revisited Reference Solar Proton Event of 23 February 1956: Assessment of the Cosmogenic‐Isotope Method Sensitivity to Extreme Solar Events, J. Geophys. Res., 125, e2020JA027921. doi: 10.1029/2020JA027921.
  9. Aguilar, M.,… Poluianov, S.,… Usoskin, I. et al. (AMS Collaboration), Properties of Neon, Magnesium, and Silicon Primary Cosmic Rays Results from the Alpha Magnetic Spectrometer, Phys. Rev. Lett. 124, 211102, 2020, doi: 10.1103/PhysRevLett.124.211102.
  10. Mishev, A.L., I.G. Usoskin, Current status and possible extension of the global neutron monitor network (Strategic and programming article), J. Space Weather Space Clim. 10, 17, 2020, doi: 10.1051/swsc/2020020.
  11. Huang, X., I. Usoskin, L.Y. Zhang, H.N. Wang, Big Data Processing and Modeling in Solar Physics, Adv. Astron., 2020, 6967925, 2020, doi: 10.1155/2020/6967925.
  12. Mishev, A., Velinov, P., Ionization Effect in the Region of Regener–Pfotzer Maximum due to Cosmic Rays during Halloween GLE Events in October-November 2003, Comptes rendus de l’Academie bulgare des Sciences, 73, No. 2, 244-251, 2020, doi:10.7546/CRABS.2020.02.13.
  13. Mishev, A.L., S.A. Koldobskiy, G.A. Kovaltsov, A. Gil, I.G. Usoskin, Updated Neutron-Monitor Yield Function: Bridging Between In Situ and Ground-Based Cosmic Ray Measurements, J. Geophys. Res. Space Phys., 125, e2019JA027433, 2020, doi: 10.1029/2019JA027433
  14. Kocharov, L., M. Pesce-Rollins, T. Laitinen, A. Mishev, P. Kühl, A. Klassen, M. Jin, N. Omodei, F. Longo, D.F. Webb, H.V. Cane, B. Heber, R. Vainio, and I. Usoskin, Interplanetary Protons versus Interacting Protons in the 2017 September 10 Solar Eruptive Event, Astrophys. J., 890, 13, 2020, doi: 10.3847/1538-4357/ab684e
  15. Frick, P., D. Sokoloff, R. Stepanov, V. Pipin and I. Usoskin, Spectral characteristic of mid-term quasi-periodicities in sunspot data, Mon. Not. R. Astron. Soc., 491, 5572-5578, 2020, doi: 10.1093/mnras/stz3238


  1. Aguilar, M.,… Poluianov, S.,… Usoskin, I. et al. (AMS Collaboration), Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer, Phys. Rev. Lett., 123, 121102, 2019, doi: 10.1103/PhysRevLett.123.181102
  2. Mishev, A., P. Jiggens, Preface to measurement, specification and forecasting of the Solar Energetic Particle (SEP) environment and Ground Level Enhancements (GLEs), J. Space Weather Space Clim.,9, E1, 2019, doi: 10.1051/swsc/2019003
  3. Mironova, I.A., A.A. Artamonov, G. A. Bazilevskaya, E. V. Rozanov, G.A. Kovaltsov, V. S. Makhmutov, A. L. Mishev, A. V. Karagodin, Ionization of the Polar Atmosphere by Energetic Electron Precipitation Retrieved From Balloon Measurements, Geophys. Res. Lett., 46, 990-996, 2019, doi: 10.1029/2018GL079421
  4. Mishev, A., I. Usoskin, Analysis of sub-GLE and GLE events using NM data: space weather applications, J. Phys.: Conf. Ser. 1181, 012006, 2019, doi: 10.1088/1742-6596/1181/1/012006
  5. Dorman, L.I., Y. Tassev, P. I. Y. Velinov, A. Mishev, D. Tomova, L. Mateev, Investigation of exceptional solar activity in September 2017: GLE 72 and unusual Forbush decrease in GCR, J. Phys.: Conf. Ser. 1181, 012070, 2019, doi: 10.1088/1742-6596/1181/1/012070
  6. Mironova, I., G. Bazilevskaya, G. Kovaltsov, A. Artamonov, E. Rozanov, A. Mishev, V.S. Makhmutov, A. Karagodin, K. Golubenko, Spectra of high energy electron precipitation and atmospheric ionization rates retrieval from balloon measurements, Sci. Total Env., 693, 133242, 2019, doi: 10.1016/j.scitotenv.2019.07.048
  7. Palmroth, M., J. Praks, R. Vainio, P. Janhunen, E.K.J. Kilpua, N.Yu. Ganushkina, …, S. Poluianov et al., FORESAIL-1 cubesat mission to measure radiation belt losses and demonstrate de-orbiting, J. Geophys. Res. (Space Phys.) 124, 5783–5799, 2019, doi: 10.1029/2018JA026354.
  8. Koldobskiy, S.A., G.A. Kovaltsov, A.L. Mishev, I.G. Usoskin, New Method of Assessment of the Integral Fluence of Solar Energetic (>1 GV Rigidity) Particles from Neutron Monitor Data, Sol. Phys., 294:, 94, 2019, doi: 10.1007/s11207-019-1485-8.
  9. Mishev, A., I. Usoskin, S. Tuohino and A. Ibragimov, The upgraded GLE database includes assessment of radiation exposure at flight altitudes, J. Phys.: Conf. Series, 1181, 012061, 2019, doi: 10.1088/1742-6596/1181/1/012061.
  10. Pevtsov, A., E. Griffin, J. Grindlay, S. Kafka, J. Bartlett, I. Usoskin, K. Mursula, S. Gibson, V. Pillet, J. Burkepile, D. Webb, F. Clette, J. Hesser, Historical astronomical data: urgent need for preservation, digitization enabling scientific exploration, Bull. Amer. Astron. Soc., 51, 190, 2019.
  11. Koldobsky, S., V. Bindi, C. Corti, G. Kovaltsov, I. Usoskin, Validation of the Neutron Monitor Yield Function Using Data From AMS-02 Experiment, 2011-2017, J. Geophys. Res. (Space Phys.), 124, 2367-2379, 2019, doi: /10.1029/2018JA026340.
  12. Jiggens, P., C. Clavie, H. Evans, et al., In situ data and effect correlation during September 2017 solar particle event, Space Weather, 17, 99-117, 2019, doi: 10.1029/2018SW001936.
  13. Väisänen, P., I. Usoskin, K. Mursula, Long-term and solar cycle variation of galactic cosmic rays: Evidence for variable heliospheric turbulence, J. Geophys. Res. Space Phys., 124, 2019, doi: 10.1029/2018JA026135.
  14. Mironova, I.A., A.A. Artamonov, G.A. Bazilevskaya, E.V. Rozanov, G.A. Kovaltsov, V.S. Makhmutov, A.L. Mishev, A.V. Karagodin, Ionization of the polar atmosphere by energetic electron precipitation retrieved from balloon measurements, Geophys. Res. Lett., 46, 2019, doi: 10.1029/2018GL079421.


  1. Wu, C.-J., N.A. Krivova, S.K. Solanki, I.G. Usoskin, Solar total and spectral irradiance reconstruction over the last 9000 years, Astron. Astrophys., 620, A120, 2018, doi: 10.1051/0004-6361/201832956.
  2. Mishev, A. L., and I.G. Usoskin, Assessment of the radiation environment at commercial jet-flight altitudes during GLE 72 on 10 September 2017 using neutron monitor data, Space Weather, 16, 2018, doi: 10.1029/2018SW001946.
  3. Gil, A., G.A. Kovaltsov, V.V. Mikhailov, A. Mishev, S. Poluianov and I.G. Usoskin, An Anisotropic Cosmic-Ray Enhancement Event on 07-June-2015: A Possible Origin, Solar Phys., 293, 154, 2018, doi: 10.1007/s11207-018-1375-5.
  4. Poluianov, S., Kovaltsov, G.A., Usoskin, I.G., Solar energetic particles and galactic cosmic rays over millions of years as inferred from data on cosmogenic 26Al in lunar samples, Astron. Astrophys., 618, A96, 2018, doi: 10.1051/0004-6361/201833561.
  5. Mishev, A., S. Tuohino, I. Usoskin, Neutron monitor count rate increase as a proxy for dose rate assessment at aviation altitudes during GLEs, J. Space Weather Space Clim., 8, A46, 2018, doi: 10.1051/swsc/2018032.
  6. Mishev, A., Velinov, P.I.Y., Ionization Effects in the Middle Stratosphere due to Cosmic Rays during Strong GLE Events, Comptes rendus de l’Acade’mie bulgare des Sciences, 71, 4, pp.523-528, 2018, doi: 10.7546/CRABS.2018.04.11.
  7. Mishev, A., I. Usoskin, O. Raukunen, M. Paassilta, E. Valtonen, L. Kocharov, R. Vainio, First Analysis of Ground-Level Enhancement (GLE) 72 on 10 September 2017: Spectral and Anisotropy Characteristics, Solar Phys., 293, 136, 2018, doi: 10.1007/s11207-018-1354-x.
  8. Uusitalo, J., L. Arppe, T. Hackman, S. Helama, G. Kovaltsov, K. Mielikäinen, H. Mäkinen, P. Nöjd, V. Palonen, I. Usoskin, M. Oinonen, Solar superstorm of AD 774 recorded subannually by Arctic tree rings, Nature Comm., 9, 3495, 2018, doi: 10.1038/s41467-018-05883-1.
  9. Kocharov, L., S. Pohjolainen, M.J. Reiner, A. Mishev, H. Wang, I. Usoskin, R. Vainio, Spatial Organization of Seven Extreme Solar Energetic Particle Events, Astrophys. J. Lett., 862, L20, 2018. doi: 10.3847/2041-8213/aad18d.
  10. Usoskin, I.G., Comment on the paper by Popova et al. “On a role of quadruple component of magnetic field in defining solar activity in grand cycles”, J. Atmos. Solar-Terr. Phys., 176, 69-71, 2018, doi: 10.1016/j.jastp.2017.09.018.
  11. Koldobskiy, S.A., G.A. Kovaltsov, I.G. Usoskin, Effective rigidity of a polar neutron monitor for recording Ground-level enhancements, Solar Phys., 293, 110, 2018, doi: 10.1007/s11207-018-1326-1.
  12. Koldobskiy, S.A., G.A. Kovaltsov, I.G. Usoskin, A solar cycle of cosmic ray fluxes for 2006-2014: Comparison between PAMELA and neutron monitors, J. Geophys. Res. Space Phys., 123, 4479-4487, 2018. doi: 10.1029/2018JA025516.
  13. Wu, C.-J., I. G. Usoskin, N. Krivova, G.A. Kovaltsov, M. Baroni, E. Bard, S.K. Solanki, Solar activity over nine millennia: A consistent multi-proxy reconstruction, Astron. Astrophys., 615, A93, 2018. doi: 10.1051/0004-6361/201731892.
  14. Egorova, T., W. Schmutz, E. Rozanov, A.I. Shapiro, I. Usoskin, et al., Revised historical solar irradiance forcing, Astron. Astrophys., 615, A85, 2018. doi: 10.1051/0004-6361/201731199.
  15. Tuohino, S., A. Ibragimov, I. Usoskin, A. Mishev, Upgrade of GLE database: Assessment of effective dose rate at flight altitude, Adv. Space Res., 62, 398-407, 2018, doi: 10.1016/j.asr.2018.04.021.
  16. Mishev, A.L., P.I.Y. Velinov, Ion production and ionization effect in the atmosphere during the Bastille day GLE 59 due to high energy SEPs, Adv. Space Res. 61, 316-325, 2018, doi: 10.1016/j.asr.2017.10.023.
  17. Willamo, T., I.G. Usoskin, G.A. Kovaltsov, A Test of the Active-Day Fraction Method of Sunspot Group Number Calibration: Dependence on the Level of Solar Activity, Solar Phys., 293, 69. 2018, doi: 10.1007/s11207-018-1292-7.
  18. Katsova, M.M., L.L. Kitchatinov, M.A. Livshits, D.L. Moss, D.D Sokoloff, I.G. Usoskin, Can Superflares Occur on the Sun? A View from Dynamo Theory, Astron. Rep., 62, 72-80, 2018, doi: 10.1134/S106377291801002X.
  19. Acero, F.G., M. C. Gallego, J. A. García, I. G. Usoskin, and J. M. Vaquero, Extreme Value Theory Applied to the Millennial Sunspot Number Series, Astrophys. J., 853, 80, 2018, doi: 10.3847/1538-4357/aaa406.
  20. Karagodin, A., I. Mironova, A. Artamonov, N. Konstantinova, Response of the total ozone to energetic electron precipitation events, J. Atm. Solar-Terr. Phys., 180, 153-158, 2018, doi: 10.1016/j.jastp.2017.12.009.


  1. Owens M.J., M. Lockwood, E. Hawkins, I. Usoskin, G.S. Jones, L. Barnard, A. Schurer, J. Fasullo, The Maunder minimum and the Little Ice Age: an update from recent reconstructions and climate simulations, J. Space Weather Space Clim., 7, A33, 2017, doi: 10.1051/swsc/2017034.
  2. Asvestari, E., A. Gil, G.A. Kovaltsov, I.G. Usoskin, Neutron Monitors and Cosmogenic Isotopes as Cosmic Ray Energy-Integration Detectors: Effective Yield Functions, Effective Energy, and Its Dependence on the Local Interstellar Spectrum, J. Geophys. Res. Space Phys., 120, 9790-9802, 2017, doi: 10.1002/2017JA024469.
  3. Jungclaus, J.H., E. Bard, M. Baroni, et al., The PMIP4 contribution to CMIP6 – Part 3: The last millennium, scientific objective, and experimental design for the PMIP4 past1000 simulations, Geosci. Model Dev., 10, 4005-4033, 2017. doi: 10.5194/gmd-10-4005-2017.
  4. Poluianov, S., Usoskin, I., Mishev, A., Shea, M., Smart, D., GLE and Sub-GLE Redefinition in the Light of High-Altitude Polar Neutron Monitors, Solar Phys., 292 (11), 2017, doi: 10.1007/s11207-017-1202-4.
  5. Mishev, A., S. Poluianov, I. Usoskin Assessment of spectral and angular characteristics of sub-GLE events using the global neutron monitor network, J. Space Weather Space Clim., 7, A28, 2017, doi: 10.1051/swsc/2017026.
  6. Matthes, K., B. Funke, M.E. Andersson, et al., Solar forcing for CMIP6 (v3.2), Geosci. Model Dev., 10, 2247-2302, 2017, doi: 10.5194/gmd-10-2247-2017.
  7. Asvestari. E., T. Willamo, A. Gil, I.G. Usoskin, G.A. Kovaltsov, V.V. Mikhailov, A. Mayorov, Analysis of Ground Level Enhancements (GLE): Extreme solar energetic particle events have hard spectra, Adv. Space Res., 60, 781-787, 2017. doi: 10.1016/j.asr.2016.08.043.
  8. Chatzistergos, T., I.G. Usoskin, G.A. Kovaltsov, N.A. Krivova and S.K. Solanki, New reconstruction of the sunspot group numbers since 1739 using direct calibration and “backbone” methods, Astron. Astrophys., 602, A69, 2017, doi: 10.1051/0004-6361/201630045.
  9. Usoskin, I.G., A. Gil, G.A. Kovaltsov, A. Mishev, V.V. Mikhailov, Heliospheric modulation of cosmic rays during the neutron monitor era: Calibration using PAMELA data for 2006-2010, J. Geophys. Res. Space Phys., 122, 3875-3887, 2017, doi: 10.1002/2016JA023819
  10. Willamo, T., I.G. Usoskin, G. A. Kovaltsov, Updated sunspot group number reconstruction for 1749-1996 using the active day fraction method, Astron, Astrophys., 601, A109, 2017, doi: 10.1051/0004-6361/201629839
  11. Kocharov, L., S. Pohjolainen, A. Mishev, M.J. Reiner, J. Lee, T. Laitinen, L.V. Didkovsky, V.J. Pizzo, R. Kim, A. Klassen, M. Karlicky, K. Cho, D.E. Gary, I. Usoskin, E. Valtonen and R. Vainio, Investigating the Origins of Two Extreme Solar Particle Events: Proton Source Profile and Associated Electromagnetic Emissions, Astrophys. J., 839, 79, 2016, doi: 10.3847/1538-4357/aa6a13.
  12. Sukhodolov, T. I.G. Usoskin, E. Rozanov, E. Asvestari, W.T. Ball, M.A.J. Curran, H. Fischer, G. Kovaltsov, F. Miyake, T. Peter, C. Plummer, W. Schmutz, M. Severi, R. Traversi, Atmospheric impacts of the strongest known solar particle storm of 775 AD, Sci. Rep., 7, 45257, 2017. doi: 10.1038/srep45257.
  13. Lockwood, M., M. Owens, E. Hawkins, G.S. Jones and I.G. Usoskin, Frost fairs, sunspots and the Little Ice Age, Astron. Geophys., 58, 2.17-2.23, 2017, doi: 10.1093/astrogeo/atx057
  14. Usoskin, I.G. A history of solar activity over millennia, Living Rev. Sol. Phys. 14, 3, 2017 doi:10.1007/s41116-017-0006-9
  15. Leussu, R., I.G. Usoskin, V. Senthamizh Pavai, A. Diercke, R. Arlt, C. Denker, K. Mursula, Wings of the butterfly: Sunspot groups for 1826–2015, Astron. Astrophys., 599, A131, 2017, doi: 10.1051/0004-6361/201629533.
  16. Asvestari, E., I.G. Usoskin, G.A. Kovaltsov, M.J. Owens, N.A. Krivova, S. Rubinetti, C. Taricco, Assessment of different sunspot number series using the cosmogenic isotope 44Ti in meteorites, Mon. Not. Royal. Astron. Soc., 467, 1608-1613, 2017, doi: 10.1093/mnras/stx190.
  17. Usoskin, I.G., G.A. Kovaltsov, L.N. Mishina, D.D. Sokoloff, J. Vaquero, An Optical Atmospheric Phenomenon Observed in 1670 over the City of Astrakhan Was Not a Mid-Latitude Aurora, Solar Phys., 292, 15, 2017 (doi: 10.1007/s11207-016-1035-6).
  18. Artamonov, A., Mironova, I., Kovaltsov, G., Mishev, A., Plotnikov, E., Konstantinova, N., Calculation of atmospheric ionization induced by electrons with non-vertical precipitation : Updated model CRAC-EPII, Adv. Space Res. 59, 2295-2300, 2017, doi:10.1016/j.asr.2017.02.019.


  1. Usoskin, I.G., U G.A. Kovaltsov, T. Chatzistergos, Dependence of the Sunspot-Group Size on the Level of Solar Activity and its Influence on the Calibration of Solar Observers, Solar Phys., 291, 3793-3805, 2016, doi: 10.1007/s11207-016-0993-z.
  2. Usoskin, I.G., G.A. Kovaltsov, M. Lockwood, K. Mursula, M. Owens, S.K. Solanki, A New Calibrated Sunspot Group Series Since 1749: Statistics of Active Day Fractions, Solar Phys., 291, 2685-2708, 2016, doi: 10.1007/s11207-015-0838-1.
  3. Lockwood, M., M.J. Owens, L. Barnard, I.G. Usoskin, Tests of Sunspot Number Sequences: 3. Effects of Regression Procedures on the Calibration of Historic Sunspot Data, Solar Phys., 291, 2829-2841, 2016, doi: 10.1007/s11207-015-0829-2.
  4. Lockwood, M., M.J. Owens, L. Barnard, C.J. Scott, I.G. Usoskin, H. Nevanlinna, Tests of Sunspot Number Sequences: 2. Using Geomagnetic and Auroral Data, Solar Phys., 291, 2811-2828, 2016, doi: 10.1007/s11207-016-0913-2.
  5. Artamonov, A., A. Mishev, I.G. Usoskin, Atmospheric ionization induced by precipitating electrons: Comparison of CRAC:EPII model with a parametrization model, J. Atmos. Solar-Terr. Phys. 149, 161-166, 2016, doi:10.1016/j.jastp.2016.04.020.
  6. Yaniv, R., Y. Yair, C. Price, K. Nicoll, G. Harrison, A. Artamonov, I. Usoskin, Balloon measurements of the vertical ionization profile over southern Israel and comparison to mid-latitude observations, J. Atm. Solar-Terr. Phys., 149, 87-92, 2016, doi: 10.1016/j.jastp.2016.10.003
  7. Leussu, R., I.G. Usoskin, R. Arlt, K. Mursula, Properties of sunspot cycles and hemispheric wings since the 19th century, Astron. Astrophys., 592, A160, 2016, doi: 10.1051/0004-6361/201628335.
  8. Poluianov, S.V., G.A. Kovaltsov, A.L. Mishev and I.G. Usoskin, Production of cosmogenic isotopes 7Be, 10Be, 14C, 22Na, and 36Cl in the atmosphere: Altitudinal profiles of yield functions, J. Geophys. Res. Atmos., 121, 8125-8136, 2016, doi:10.1002/2016JD025034.
  9. Owens, M.J., E. Cliver, K. G. McCracken, J. Beer, L. Barnard, M. Lockwood, A. Rouillard, D. Passos, P. Riley, I. Usoskin, and Y-M. Wang, Near-Earth heliospheric magnetic field intensity since 1750: 1. Sunspot and geomagnetic reconstructions, J. Geophys. Res., 121, 6048-6063, doi:10.1002/2016JA022529.
  10. Owens, M.J., E. Cliver, K. G. McCracken, J. Beer, L. Barnard, M. Lockwood, A. Rouillard, D. Passos, P. Riley, I. Usoskin, and Y-M. Wang, Near-Earth heliospheric magnetic field intensity since 1750: 2. Cosmogenic radionuclide reconstructions, J. Geophys. Res., 121, 6064-6074, doi:10.1002/2016JA022550.
  11. Lockwood, M., M. J. Owens, L. Barnard, and I. G. Usoskin, An assessment of sunspot number data composites over 1845-2014, Astrophys. J., 824, 54, 2016, doi:10.3847/0004-637X/824/1/54
  12. Mishev, A.L., I. G. Usoskin, Analysis of the Ground-Level Enhancements on 14 July 2000 and 13 December 2006 Using Neutron Monitor Data, Solar Physics, 291, 1225-1239, 2016, doi: 10.1007/s11207-016-0877-2.
  13. Artamonov, A.A., A. L. Mishev, I. G. Usoskin, Model CRAC:EPII for atmospheric ionization due to precipitating electrons: Yield function and applications, J. Geophys. Res., 121, 1736-1743, doi: 10.1002/2015JA022276, 2016.
  14. Usoskin, I.G., Y. Gallet, F. Lopes, G. A. Kovaltsov, G. Hulot, Solar activity during the Holocene: the Hallstatt cycle and its consequence for grand minima and maxima, Astron. Astrophys., 587, A150, 2016, doi: 10.1051/0004-6361/201527295.
  15. Asvestari, E. and I.G. Usoskin, An empirical model of heliospheric cosmic ray modulation on long-term time scale. J. Space Weather Space Clim., 6, A15, 2016, doi: 10.1051/swsc/2016011.
  16. Artamonov, A.A., G. A. Kovaltsov, A. L. Mishev, I. G. Usoskin, Neutron monitor yield function for solar neutrons: A new computation, J. Geophys. Res., 121, 117-128, 2016, doi: 10.1002/2015JA021993.
  17. Traversi, R., S. Becagli, S. Poluianov, M. Severi, S.K. Solanki, I.G. Usoskin and R. Udisti, The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core, Sci. Rep., 6, 20235, 2016, doi: 10.1038/srep20235.
  18. Mishev A.L., Contribution of cosmic ray particles to radiation environment at high mountain altitude: Comparison of Monte Carlo simulations with experimental data, J. Environmental Radioactivity 153, 15–22, 2016, doi:10.1016/j.jenvrad.2015.12.002.
  19. Mishev A., Velinov P., Ionization effect due to cosmic rays during Bastille Day Event : GLE 59 on short and mid time scales, Comptes Rendus de L’Académie Bulgare des Sciences 69, 1479–1484, 2016.

A list of non-referenced publications

  1. S. Koldobskiy, G. Kovaltsov, I. Usoskin, Role of heavier-than-proton nuclei in neutron monitor response, Proc. Of Sci., 395 (ICRC2021), 1284, 2021.
  2. S. Koldobskiy, O. Raukunen, R. Vainio, G. Kovaltsov, I. Usoskin, New reconstruction of the event-integrated spectra for GLE events, Proc. Of Sci., 395 (ICRC2021), 1273, 2021.
  3. A. Mishev, S. Koldobskiy, G. Kovaltsov, A. Gil, I. Usoskin, New neutron monitor altitude-dependent yield function and its application to an analysis of neutron-monitor data, Proc. Of Sci., 395 (ICRC2021), 1247, 2021.
  4. Similä, M., Poluianov, S. Usoskin, I., Mishev, A., Kovaltsov, G., Strauss, D.T. Pulse height-length analysis of data from neutron monitors DOMC/DOMB with a new data acquisition system, Proc. Of Sci., 395 (ICRC2021), 1237, 2021. doi:10.22323/1.395.1237
  5. Poluianov, S. and Mishev, A. The altitude profile of the cosmic ray atmospheric cutoff, Proc. Of Sci., 395 (ICRC2021), 1331, 2021. doi:10.22323/1.395.1331
  6. Usoskin, I., S. Koldobskiy, G. Kovaltsov, E. Rozanov, T. Sukhodolov, A. Mishev and I. Mironova, Strongest directly observed Solar Proton Event of 23-Feb-1956: Revised reference for the cosmogenic-isotope method, Proc. Of Sci., 395 (ICRC2021), 1319, 2021.
  7. Usoskin, I., S. Koldobskiy, A. Gil, G. Kovaltsov, I. Usoskina, T. Willamo and A. Ibragimov, A major update of the International GLE Database: Correction for the variable GCR background, Proc. Of Sci., 395 (ICRC2021), 1241, 2021.
  8. Kasztelan, M. M. Kasztelan, T. Enqvist, K. Jędrzejczak, J. Joutsenvaara, O. Kotavaara, P. Kuusiniemi, K.K. Loo, J. Orzechowski, J. Puputti, A. Sobkow, M. Słupecki, J. Szabelski, I. Usoskin, W.H. Trzaska and T.E. Ward, High-multiplicity neutron events registered by NEMESIS experiment, Proc. Of Sci., 395 (ICRC2021), 497, 2021.
  9. Trzaska, W.H. T. Enqvist, K. Jedrzejczak, J. Joutsenvaara, M. Kasztelan, O. Kotavaara, P. Kuusiniemi, K.K. Loo, J. Orzechowski, J. Puputti, A. Sobkow, M. Slupecki, J. Szabelski, I. Usoskin and T. E. Ward, New NEMESIS results, Proc. Of Sci., 395 (ICRC2021), 514, 2021.
  10. Poluianov, S., I. Usoskin, A. Ibragimov, Data management at the Oulu cosmic ray station, in: Cosmic ray studies with neutron detectors, pp. 205-207, Kiel University Publ. (2021) doi: 10.38072/2748-3150/p25.
  11. Similä, M., S. Poluianov, I. Usoskin, Study of individual pulses at the Antarctic high-altitude neutron monitor DOMC, in: Cosmic ray studies with neutron detectors, pp. 173-176, Kiel University Publ. (2021) doi: 10.38072/2748-3150/p22.
  12. Poluianov, S., I. Usoskin, D.T. Strauss, Upgrade of electronics of neutron monitors DOMC and DOMB, in: Cosmic ray studies with neutron detectors, pp- 167-172, Kiel University Publ. (2021) doi: 10.38072/2748-3150/p21.
  13. Abunina, M. R. Bütikofer, K.L. Klein, O. Kryakunova, M. Laurenza, D. Ruffolo, D. Sapundjiev, C. Steiges, I. Usoskin, 1st virtual symposium on cosmic ray studies with neutron detectors, in: Cosmic ray studies with neutron detectors, pp. 7-12, Kiel University Publ. (2021) doi: 10.38072/2748-3150/p1. 

Public relations:

  1. Usoskin, I.G., New 14C-Based Reconstructions of 11-Year Solar Cycles: Longer Than a Millennium Now, SCOSTEP Newsletters, v.29, p. 1-2, 2021.
  2. Ilya Usoskin elected as a Vice-President of the IAU
  3. Solar ‘Superflares’ Rocked Earth Less Than 10,000 Years Ago—and Could Strike Again
  4. How astronomers probe the Sun’s explosive past