The monthly values of the modulation parameter (in MV) reconstructed from the ground based cosmic ray data, using the procedure described in Ref.(1). Local Interstellar spectrum (LIS) corresponds to Ref. (2) References: [1] 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 [2] Vos, E.E., and M. S. Potgieter), New modeling of galactic proton modulation during the minimum of solar cycle 23/24, Astrophys. J., 815, 119, 2015. doi:10.1088/0004-637X/815/2/119. Year Phi (MV) +++++++++++++++ 1951.083 661 1951.167 651 1951.250 642 1951.333 601 1951.417 571 1951.500 600 1951.583 623 1951.667 580 1951.750 574 1951.833 588 1951.917 573 1952.000 599 1952.083 609 1952.167 622 1952.250 595 1952.333 557 1952.417 540 1952.500 528 1952.583 529 1952.667 521 1952.750 558 1952.833 541 1952.917 553 1953.000 575 1953.083 563 1953.167 569 1953.250 565 1953.333 564 1953.417 553 1953.500 561 1953.583 556 1953.667 553 1953.750 543 1953.833 545 1953.917 533 1954.000 527 1954.083 515 1954.167 497 1954.250 504 1954.333 499 1954.417 501 1954.500 495 1954.583 480 1954.667 485 1954.750 487 1954.833 495 1954.917 504 1955.000 539 1955.083 505 1955.167 503 1955.250 503 1955.333 496 1955.417 500 1955.500 500 1955.583 508 1955.667 496 1955.750 516 1955.833 513 1955.917 549 1956.000 580 1956.083 606 1956.167 656 1956.250 613 1956.333 637 1956.417 627 1956.500 602 1956.583 607 1956.667 632 1956.750 580 1956.833 663 1956.917 775 1957.000 856 1957.083 863 1957.167 840 1957.250 914 1957.333 872 1957.417 902 1957.500 933 1957.583 893 1957.667 1015 1957.750 970 1957.833 986 1957.917 1046 1958.000 1040 1958.083 1021 1958.167 1078 1958.250 1061 1958.333 978 1958.417 937 1958.500 1010 1958.583 954 1958.667 939 1958.750 936 1958.833 922 1958.917 959 1959.000 932 1959.083 966 1959.167 900 1959.250 862 1959.333 925 1959.417 880 1959.500 1071 1959.583 1038 1959.667 992 1959.750 909 1959.833 896 1959.917 916 1960.000 962 1960.083 932 1960.167 888 1960.250 947 1960.333 945 1960.417 906 1960.500 905 1960.583 854 1960.667 856 1960.750 856 1960.833 892 1960.917 850 1961.000 789 1961.083 770 1961.167 771 1961.250 775 1961.333 746 1961.417 750 1961.500 856 1961.583 784 1961.667 753 1961.750 729 1961.833 683 1961.917 700 1962.000 704 1962.083 715 1962.167 705 1962.250 720 1962.333 689 1962.417 682 1962.500 675 1962.583 675 1962.667 696 1962.750 701 1962.833 677 1962.917 686 1963.000 644 1963.083 627 1963.167 629 1963.250 611 1963.333 634 1963.417 610 1963.500 606 1963.583 615 1963.667 641 1963.750 619 1963.833 608 1963.917 591 1964.000 577 1964.085 579 1964.167 562 1964.249 553 1964.331 538 1964.415 531 1964.497 534 1964.582 529 1964.667 521 1964.749 518 1964.833 516 1964.915 499 1965.000 497 1965.085 495 1965.162 484 1965.247 472 1965.329 466 1965.414 498 1965.496 515 1965.581 517 1965.666 511 1965.748 499 1965.833 484 1965.915 485 1966.000 501 1966.085 503 1966.162 525 1966.247 534 1966.329 517 1966.414 551 1966.496 571 1966.581 575 1966.666 673 1966.748 614 1966.833 591 1966.915 616 1967.000 633 1967.085 647 1967.162 614 1967.247 623 1967.329 659 1967.414 675 1967.496 656 1967.581 683 1967.666 674 1967.748 663 1967.833 691 1967.915 694 1968.000 680 1968.085 688 1968.164 693 1968.249 684 1968.331 708 1968.415 752 1968.497 746 1968.582 732 1968.667 758 1968.749 801 1968.833 883 1968.915 854 1969.000 761 1969.085 756 1969.162 771 1969.247 788 1969.329 864 1969.414 897 1969.496 861 1969.581 812 1969.666 784 1969.748 774 1969.833 770 1969.915 772 1970.000 768 1970.085 740 1970.162 746 1970.247 791 1970.329 783 1970.414 849 1970.496 848 1970.581 801 1970.666 754 1970.748 736 1970.833 776 1970.915 704 1971.000 691 1971.085 652 1971.162 644 1971.247 644 1971.329 627 1971.414 579 1971.496 574 1971.581 559 1971.666 557 1971.748 535 1971.833 538 1971.915 550 1972.000 545 1972.085 542 1972.164 509 1972.249 499 1972.331 516 1972.415 565 1972.497 533 1972.582 649 1972.667 542 1972.749 529 1972.833 554 1972.915 532 1973.000 525 1973.085 528 1973.162 548 1973.247 603 1973.329 639 1973.414 582 1973.496 559 1973.581 546 1973.666 513 1973.748 516 1973.833 508 1973.915 505 1974.000 514 1974.085 500 1974.162 527 1974.247 535 1974.329 580 1974.414 603 1974.496 648 1974.581 605 1974.666 635 1974.748 629 1974.833 614 1974.915 566 1975.000 560 1975.085 535 1975.162 527 1975.247 517 1975.329 511 1975.414 501 1975.496 506 1975.581 523 1975.666 516 1975.748 520 1975.833 545 1975.915 524 1976.000 531 1976.085 521 1976.164 522 1976.249 540 1976.331 520 1976.415 508 1976.497 501 1976.582 500 1976.667 492 1976.749 495 1976.833 494 1976.915 499 1977.000 506 1977.085 503 1977.162 492 1977.247 499 1977.329 498 1977.414 510 1977.496 546 1977.581 540 1977.666 541 1977.748 515 1977.833 504 1977.915 503 1978.000 547 1978.085 560 1978.162 568 1978.247 613 1978.329 667 1978.414 623 1978.496 619 1978.581 560 1978.666 555 1978.748 603 1978.833 583 1978.915 583 1979.000 622 1979.085 638 1979.162 664 1979.247 720 1979.329 696 1979.414 757 1979.496 757 1979.581 821 1979.666 799 1979.748 748 1979.833 749 1979.915 701 1980.000 717 1980.085 727 1980.164 692 1980.249 735 1980.331 734 1980.415 813 1980.497 817 1980.582 803 1980.667 793 1980.749 853 1980.833 905 1980.915 906 1981.000 833 1981.085 878 1981.162 888 1981.247 919 1981.329 955 1981.414 869 1981.496 860 1981.581 858 1981.666 816 1981.748 911 1981.833 894 1981.915 827 1982.000 773 1982.085 877 1982.162 784 1982.247 765 1982.329 735 1982.414 880 1982.496 1012 1982.581 1008 1982.666 1082 1982.748 1008 1982.833 973 1982.915 1029 1983.000 936 1983.085 876 1983.162 816 1983.247 807 1983.329 890 1983.414 834 1983.496 776 1983.581 777 1983.666 748 1983.748 743 1983.833 733 1983.915 731 1984.000 710 1984.085 722 1984.164 763 1984.249 791 1984.331 859 1984.415 807 1984.497 784 1984.582 747 1984.667 731 1984.749 730 1984.833 739 1984.915 725 1985.000 709 1985.085 665 1985.162 654 1985.247 637 1985.329 629 1985.414 596 1985.496 606 1985.581 606 1985.666 575 1985.748 571 1985.833 554 1985.915 561 1986.000 564 1986.085 627 1986.162 578 1986.247 524 1986.329 515 1986.414 511 1986.496 508 1986.581 507 1986.666 503 1986.748 488 1986.833 524 1986.915 491 1987.000 466 1987.085 446 1987.162 447 1987.247 451 1987.329 470 1987.414 507 1987.496 527 1987.581 551 1987.666 571 1987.748 571 1987.833 597 1987.915 594 1988.000 665 1988.085 640 1988.164 627 1988.249 642 1988.331 636 1988.415 646 1988.497 691 1988.582 703 1988.667 694 1988.749 712 1988.833 723 1988.915 796 1989.000 828 1989.085 832 1989.162 980 1989.247 956 1989.329 1014 1989.414 1000 1989.496 912 1989.581 952 1989.666 986 1989.748 1055 1989.833 1126 1989.915 1078 1990.000 1018 1990.085 1000 1990.162 1034 1990.247 1103 1990.329 1123 1990.414 1125 1990.496 1036 1990.581 1059 1990.666 999 1990.748 941 1990.833 890 1990.915 889 1991.000 826 1991.085 814 1991.162 1018 1991.247 990 1991.329 972 1991.414 1360 1991.496 1334 1991.581 1133 1991.666 990 1991.748 953 1991.833 943 1991.915 895 1992.000 889 1992.085 923 1992.164 852 1992.249 769 1992.331 797 1992.415 734 1992.497 693 1992.582 696 1992.667 713 1992.749 671 1992.833 688 1992.915 646 1993.000 658 1993.085 662 1993.162 695 1993.247 651 1993.329 635 1993.414 620 1993.496 612 1993.581 612 1993.666 596 1993.748 591 1993.833 593 1993.915 595 1994.000 596 1994.085 635 1994.162 625 1994.247 631 1994.329 612 1994.414 610 1994.496 594 1994.581 574 1994.666 556 1994.748 564 1994.833 563 1994.915 570 1995.000 553 1995.085 542 1995.162 560 1995.247 549 1995.329 542 1995.414 544 1995.496 541 1995.581 535 1995.666 530 1995.748 533 1995.833 530 1995.915 526 1996.000 522 1996.085 505 1996.164 505 1996.249 499 1996.331 505 1996.415 505 1996.497 506 1996.582 509 1996.667 514 1996.749 522 1996.833 525 1996.915 517 1997.000 506 1997.085 497 1997.162 494 1997.247 498 1997.329 495 1997.414 496 1997.496 499 1997.581 489 1997.666 496 1997.748 507 1997.833 518 1997.915 510 1998.000 505 1998.085 500 1998.162 498 1998.247 559 1998.329 606 1998.414 583 1998.496 554 1998.581 589 1998.666 558 1998.748 536 1998.833 552 1998.915 576 1999.000 618 1999.085 623 1999.162 609 1999.247 593 1999.329 601 1999.414 584 1999.496 568 1999.581 632 1999.666 687 1999.748 719 1999.833 735 1999.915 757 2000.000 728 2000.085 759 2000.164 795 2000.249 788 2000.331 846 2000.415 899 2000.497 958 2000.582 908 2000.667 868 2000.749 811 2000.833 889 2000.915 859 2001.000 820 2001.085 761 2001.162 723 2001.247 866 2001.329 789 2001.414 769 2001.496 757 2001.581 809 2001.666 804 2001.748 844 2001.833 798 2001.915 775 2002.000 851 2002.085 767 2002.162 798 2002.247 804 2002.329 801 2002.414 785 2002.496 830 2002.581 889 2002.666 841 2002.748 820 2002.833 870 2002.915 849 2003.000 822 2003.085 821 2003.162 808 2003.247 833 2003.329 844 2003.414 903 2003.496 853 2003.581 834 2003.666 800 2003.748 844 2003.833 1026 2003.915 840 2004.000 852 2004.085 766 2004.164 715 2004.249 691 2004.331 664 2004.415 663 2004.497 700 2004.582 685 2004.667 660 2004.749 601 2004.833 667 2004.915 651 2005.000 757 2005.085 675 2005.162 656 2005.247 634 2005.329 692 2005.414 647 2005.496 663 2005.581 686 2005.666 755 2005.748 629 2005.833 603 2005.915 603 2006.000 582 2006.085 552 2006.162 522 2006.247 519 2006.329 506 2006.414 508 2006.496 521 2006.581 519 2006.666 514 2006.748 496 2006.833 500 2006.915 546 2007.000 492 2007.085 498 2007.162 484 2007.247 463 2007.329 459 2007.414 456 2007.496 459 2007.581 463 2007.666 453 2007.748 455 2007.833 462 2007.915 453 2008.000 462 2008.085 465 2008.164 462 2008.249 464 2008.331 465 2008.415 463 2008.497 457 2008.582 445 2008.667 437 2008.749 437 2008.833 429 2008.915 426 2009.000 421 2009.085 414 2009.162 407 2009.247 398 2009.329 389 2009.414 393 2009.496 393 2009.581 396 2009.666 389 2009.748 390 2009.833 397 2009.915 390 2010.000 398 2010.085 436 2010.162 448 2010.247 475 2010.329 462 2010.414 471 2010.496 478 2010.581 489 2010.666 483 2010.748 483 2010.833 496 2010.915 499 2011.000 488 2011.085 486 2011.162 513 2011.247 568 2011.329 534 2011.414 599 2011.496 576 2011.581 568 2011.666 568 2011.748 590 2011.833 549 2011.915 516 2012.000 542 2012.085 574 2012.164 644 2012.249 557 2012.331 555 2012.415 590 2012.497 662 2012.582 649 2012.667 610 2012.749 610 2012.833 601 2012.915 587 2013.000 571 2013.085 565 2013.162 595 2013.247 590 2013.329 667 2013.414 675 2013.496 656 2013.581 644 2013.666 630 2013.748 598 2013.833 610 2013.915 635 2014.000 630 2014.085 670 2014.162 650 2014.247 639 2014.329 620 2014.414 658 2014.496 640 2014.581 607 2014.666 640 2014.748 636 2014.833 648 2014.915 703 2015.000 674 2015.085 672 2015.162 709 2015.247 684 2015.329 654 2015.414 664 2015.496 628 2015.581 622 2015.666 623 2015.748 612 2015.833 603 2015.915 590 2016.000 554 2016.085 526 2016.162 531 2016.247 529 2016.329 524 2016.414 525 2016.496 537 2016.581 519 2016.666 518 2016.748 497 2016.833 482 2016.915 483 2017.000 465 2017.085 458 2017.162 451 2017.247 466 2017.329 460 2017.414 453 2017.496 477 2017.581 505 2017.666 522 2017.748 493 2017.833 466 2017.915 460 2018.000 459 2018.083 451 2018.167 448 2018.250 442 2018.333 446 2018.417 431 2018.500 433 2018.583 433 2018.667 429 2018.750 425 2018.833 430 2018.917 434 2019.000 434 2019.083 438 2019.167 421 2019.250 421 2019.333 444 2019.417 426 2019.500 426 2019.583 429 2019.667 419 2019.750 414 2019.833 418 2019.917 417 2020.000 410 2020.083 398 2020.167 402 2020.250 391 2020.333 399 2020.417 408 2020.500 411 2020.583 412 2020.667 413 2020.750 416 2020.833 416 2020.917 431 2021.000 435 2021.083 464 2021.167 430 2021.250 419 2021.333 422 2021.417 428 2021.500 438 2021.583 428 2021.667 432 2021.750 432 2021.833 453 2021.917 443 2022.000 449 2022.083 472 2022.167 474 2022.250 482 2022.333 514 2022.417 551 2022.500 579 2022.583 607 2022.667 583 2022.750 563 2022.833 566 2022.917 622 2023.000 634 2023.083 686 2023.167 694 2023.250 662 2023.333 676 2023.417 680 2023.500 712 2023.583 749 2023.667 758 2023.750 720 2023.833 760 2023.917 775 2024.000 764 2024.083 770 2024.167 766 2024.250 759 2024.333 812 2024.417 766 2024.500 728 2024.583 788 2024.667 849 2024.750 906 2024.833 894 2024.917 881 2025.000 852 2025.083 831 2025.167 838 2025.250 856 2025.333 833 2025.417 918 2025.500 854 2025.583 825 2025.667 856 2025.750 845 2025.833 952 2025.917 908