ANNUAL MEAN VALUES FOR DISTURBED DAYS CHICHIJIMA YEAR D I H X Y Z F Deg Min Deg Min nT nT nT nT nT 1973 -3 3.3 *1 36 39.9 *1 32531 *1 32484 *1 -1733 *1 24217 *1 40555 *1 1974 -3 4.3 36 38.4 32546 32498 -1743 24206 40560 1975 -3 4.5 36 35.6 32573 32526 -1746 24186 40570 1976 -3 5.4 36 33.5 32593 32545 -1757 24170 40577 1977 -3 6.1 *2 36 31.3 *2 32626 *2 32578 *2 -1765 *2 24158 *3 40593 *3 1978 -3 7.9 36 30.6 32624 32574 -1782 24150 40589 1979 -3 8.1 36 27.8 *4 32661 *4 32612 *4 -1786 *4 24137 40612 *4 1980 -3 8.7 36 25.9 32694 32644 -1794 24133 40637 1981 -3 10.1 36 26.8 32683 32632 -1806 24137 40630 1982 -3 11.3 36 28.6 32669 32618 -1816 24153 40628 1983 -3 11.6 *5 36 27.9 *5 32702 *5 32651 *5 -1821 *5 24168 *5 40664 *5 1984 -3 15.2 *5 36 29.9 *5 32704 *5 32651 *5 -1856 *5 24199 *5 40684 *5 1985 -3 15.4 36 30.2 32723 32670 -1858 24217 40710 1986 -3 16.7 36 31.6 32727 32673 -1871 24241 40727 1987 -3 15.9 *6 36 32.4 32745 32700 *6 -1865 *6 24265 40756 1988 - *6 36 34.7 *7 32716 *7 - *6 - *6 24277 *7 40739 *7 1989 -3 20.4 *6 36 38.0 *7 32713 *7 32657 *6 -1905 *6 24323 *7 40765 *7 1990 -3 21.6 36 39.5 32725 32668 -1918 24355 40793 1991 -3 23.3 36 43.2 32706 32648 -1933 24395 40802 1992 -3 24.5 36 45.6 32719 32661 -1945 24442 40841 1993 -3 25.7 *8 36 49.3 *8 32724 *8 32665 *8 -1956 *8 24499 *8 40879 *8 1994 -3 26.9 *8 36 54.0 *8 32713 *8 32653 *8 -1968 *8 24561 *8 40907 *8 1995 -3 27.7 *9 36 56.6 *9 32722 *9 32662 *9 -1976 *9 24608 *9 40942 *9 1996 -3 30.1 *9 37 0.6 *9 32726 *9 32664 *9 -1998 *9 24669 *9 40982 *9 1997 -3 31.4 37 4.2 32704 32642 -2009 24707 40988 1998 -3 33.3 37 9.3 32665 32602 -2026 24753 40980 *10 1999 -3 34.0 *11 37 11.3 *11 32663 *11 32600 *11 -2032 *11 24781 *11 40999 *11 2000 -3 35.3 *12 37 14.7 *12 32629 *12 32565 *12 -2042 *12 24807 *12 40988 *12 2001 -3 35.6 37 15.6 32618 32554 -2044 24812 40982 2002 -3 35.8 37 16.4 32613 32548 -2046 24820 40983 2003 -3 36.9 37 18.3 32585 32520 -2054 24828 40966 2004 -3 37.6 37 17.9 32591 32526 -2062 24825 40970 2005 -3 38.4 37 18.7 32586 32520 -2069 24834 40970 2006 -3 39.2 37 18.6 32599 32533 -2078 24843 40986 2007 -3 40.9 37 19.6 32605 32537 -2094 24862 41003 2008 -3 42.9 37 20.9 32608 32539 -2112 24884 41018 2009 -3 45.1 37 22.3 32618 32548 -2134 24912 41044 2010 -3 48.2 37 24.7 32610 32538 -2163 24944 41057 2011 -3 51.8 37 27.1 32609 32535 -2197 24978 41076 2012 -3 55.3 37 30.1 32603 32526 -2230 25019 41096 2013 -3 59.1 37 31.2 32629 32550 -2268 25055 41139 2014 -4 2.8 37 31.5 32660 32578 -2304 25083 41180 2015 -4 7.3 37 33.9 32655 32571 -2347 25117 41198 2016 -4 11.2 37 33.5 32695 32608 -2387 25141 41244 2017 -4 15.1 *13 37 33.9 *13 32718 *13 32628 *13 -2426 *13 25164 *13 41277 2018 -4 18.7 37 32.7 32755 32662 -2463 25175 41311 2019 -4 22.5 37 30.6 32794 32698 -2502 25173 41342 2020 -4 26.5 37 27.5 32836 32737 -2543 25157 41367 *14 2021 -4 30.0 37 25.1 32864 32762 -2579 25142 41379 2022 -4 33.2 37 23.9 32879 32775 -2610 25137 41387 *15 *1 From 1973/01/01 to 1973/01/31 are missed. *2 From 1977/10/01 to 1977/10/31 are missed. *3 From 1977/05/01 to 1977/07/31 and from 1977/10/01 to 1977/10/31 are missed. *4 From 1979/07/18 to 1979/08/16 are missed. *5 From 1983/11/07 to 1984/03/31 are missed. *6 From 1987/04/01 to 1989/01/22 are missed. *7 From 1988/04/01 to 1989/01/22 are missed. *8 From 1993/12/07 to 1994/01/12 are missed. *9 From 1995/09/24 to 1996/05/12 are missed. *10 From 1998/01/09 to 1998/03/12 are missed. *11 From 1999/09/02 to 1999/11/17 are missed. *12 From 2000/09/15 to 2000/10/21 are missed. *13 From 2017/08/10 to 2017/09/22 are missed. *14 From 2020/07/01 to 2020/09/29 are missed. *15 From 2022/09/22 to 2022/10/26 are missed. Seasons are grouped as follows: Winter : January, February, November, December Equinox : March, April, September, October Summer : May, June, July, August