# 12th Generation International Geomagnetic Reference Field Schmidt semi-normalised spherical harmonic coefficients, degree n=1,13
# in units nanoTesla for IGRF and definitive DGRF main-field models (degree n=1,8 nanoTesla/year for secular variation (SV))
c/sdegordIGRFIGRF IGRFIGRFIGRFIGRFIGRF IGRFIGRFDGRFDGRFDGRF DGRFDGRFDGRFDGRFDGRF DGRFDGRFDGRFDGRFDGRF DGRFIGRFSV
g/hnm 1900.01905.0 1910.01915.0 1920.01925.0 1930.01935.0 1940.01945.0 1950.01955.0 1960.01965.0 1970.01975.0 1980.01985.0 1990.01995.0 2000.02005.0 2010.02015.0 2015-20
g10 -31543-31464 -31354-31212 -31060-30926 -30805-30715 -30654-30594 -30554-30500 -30421-30334 -30220-30100 -29992-29873 -29775-29692 -29619.4-29554.63 -29496.57-29442.0 10.3
g11 -2298-2298 -2297-2306 -2317-2318 -2316-2306 -2292-2285 -2250-2215 -2169-2119 -2068-2013 -1956-1905 -1848-1784 -1728.2-1669.05 -1586.42-1501.0 18.1
h11 59225909 589858755845 58175808 581258215810 58155820 579157765737 56755604 550054065306 5186.15077.99 4944.264797.1 -26.6
g20 -677-728 -769-802-839 -893-951 -1018-1106-1244 -1341-1440 -1555-1662 -1781-1902 -1997-2072 -2131-2200 -2267.7-2337.24 -2396.06-2445.1 -8.7
g21 29052928 294829562959 29692980 298429812990 29983003 300229973000 30103027 304430593070 3068.43047.69 3026.343012.9 -3.3
h21 -1061-1086 -1128-1191 -1259-1334 -1424-1520 -1614-1702 -1810-1898 -1967-2016 -2047-2067 -2129-2197 -2279-2366 -2481.6-2594.50 -2708.54-2845.6 -27.4
g22 9241041 117613091407 14711517 155015661578 15761581 159015941611 16321663 168716861681 1670.91657.76 1668.171676.7 2.1
h22 11211065 1000917823 728644 586528477 381291 20611425 -68-200 -306-373-413 -458.0-515.43 -575.73-641.9 -14.1
g30 10221037 105810841111 11401172 120612401282 12971302 130212971287 12761281 129613141335 1339.61336.30 1339.851350.7 3.4
g31 -1469-1494 -1524-1559 -1600-1645 -1692-1740 -1790-1834 -1889-1944 -1992-2038 -2091-2144 -2180-2208 -2239-2267 -2288.0-2305.83 -2326.54-2352.3 -5.5
h31 -330-357 -389-421-445 -462-480 -494-499-499 -476-462 -414-404-366 -333-336 -310-284-262 -227.6-198.86 -160.40-115.3 8.2
g32 12561239 122312121205 12021205 121512321255 12741288 128912921278 12601251 124712481249 1252.11246.39 1232.101225.6 -0.7
h32 334 6284103 119133 146163186 206216 224240251 262271 284293302 293.4269.72 251.75244.9 -0.4
g33 572635 705778839 881907 918916913 896882 878856838 830833 829802759 714.5672.51 633.73582.0 -10.1
h33 523480 425360293 229166 10143-11 -46-83 -130-165-196 -223-252 -297-352-427 -491.1-524.72 -537.03-538.4 1.8
g40 876880 884887889 891896 903914944 954958 957957952 946938 936939940 932.3920.55 912.66907.6 -0.7
g41 628643 660678695 711727 744762776 792796 800804800 791782 780780780 786.8797.96 808.97813.7 0.2
h41 195203 211218220 216205 188169144 136133 135148167 191212 232247262 272.6282.07 286.48283.3 -1.3
g42 660653 644631616 601584 565550544 528510 504479461 438398 361325290 250.0210.65 166.58120.4 -9.1
h42 -69-77 -90-109-134 -163-195 -226-252-276 -278-274 -278-269-266 -265-257 -249-240-236 -231.9-225.23 -211.03-188.7 5.3
g43 -361-380 -400-416-424 -426-422 -415-405-421 -408-397 -394-390-395 -405-419 -424-423-418 -403.0-379.86 -356.83-334.9 4.1
h43 -210-201 -189-173-153 -130-109 -90-72-55 -37-23 31326 3953 698497 119.8145.15 164.46180.9 2.9
g44 134146 160178199 217234 249265304 303290 269252234 216199 170141122 111.3100.00 89.4070.4 -4.3
h44 -75-65 -55-51-57 -70-90 -114-141-178 -210-230 -255-269-279 -288-297 -297-299-306 -303.8-305.36 -309.72-329.5 -5.2
g50 -184-192 -201-211-221 -230-237 -241-241-253 -240-229 -222-219-216 -218-218 -214-214-214 -218.8-227.00 -230.87-232.6 -0.2
g51 328328 327327326 326327 329334346 349360 362358359 356357 355353352 351.4354.41 357.29360.1 0.5
h51 -210-193 -172-148-122 -96-72 -51-33-12 315 161926 3146 474646 43.842.72 44.5847.3 0.6
g52 264259 253245236 226218 211208194 211230 242254262 264261 253245235 222.3208.95 200.26192.4 -1.3
h52 5356 575858 5860 647195 103110 125128139 148150 150154165 171.9180.25 189.01197.0 1.7
g53 5-1 -9-16-23 -28-32 -33-33-20 -20-23 -26-31-42 -59-74 -93-109-118 -130.4-136.54 -141.05-140.9 -0.1
h53 -33-32 -33-34-38 -44-53 -64-75-67 -87-98 -117-126-139 -152-151 -154-153-143 -133.1-123.45 -118.06-119.3 -1.2
g54 -86-93 -102-111-119 -125-131 -136-141-142 -147-152 -156-157-160 -159-162 -164-165-166 -168.6-168.05 -163.17-157.5 1.4
h54 -124-125 -126-126-125 -122-118 -115-113-119 -122-121 -114-97-91 -83-78 -75-69-55 -39.3-19.57 -0.0116.0 3.4
g55 -16-26 -38-51-62 -69-74 -76-76-82 -76-69 -63-62-56 -49-48 -46-36-17 -12.9-13.55 -8.034.1 3.9
h55 311 213243 5158 646982 8078 818183 8892 9597107 106.3103.85 101.04100.2 0.0
g60 6362 626161 6160 595759 5447 464543 4548 536168 72.373.60 72.7870.0 -0.3
g61 6160 585755 5453 535457 5757 586164 6666 656567 68.269.56 68.6967.7 -0.1
h61 -9-7 -5-20 344 46 -1-9-10 -11-12 -13-15-16 -16-17 -17.4-20.33-20.90 -20.80.0
g62 -11-11 -11-10-10 -9-9 -8-76 431 815 284251 5968 74.276.7475.92 72.7-0.7
h62 8386 899396 99102 104105100 9996 99100100 9993 888272 63.754.75 44.1833.2 -2.1
g63 -217-221 -224-228-233 -238-242 -246-249-246 -247-247 -237-228-212 -198-192 -185-178-170 -160.9-151.34 -141.40-129.9 2.1
h63 245 811 141925 3316 334860 6872 757169 6967 65.163.6361.54 58.9-0.7
g64 -58-57 -54-51-46 -40-32 -25-18-25 -16-8 -142 144 3-1 -5.9-14.58-22.83 -28.9-1.2
h64 -35-32 -29-26-22 -18-16 -15-15-9 -12-16 -20-32-37 -41-43 -48-52-58 -61.2-63.53 -66.26-66.7 0.2
g65 5957 544944 3932 251821 127 -213 614 161819 16.914.58 13.1013.2 0.3
h65 3632 282318 138 40-16 -12-12 -11-8-6 -4-2 -111 0.70.24 3.027.30.9
g66 -90-92 -95-98-101 -103-104 -106-107-104 -105-107 -113-111-112 -111-108 -102-96-93 -90.4-86.36 -78.09-70.9 1.6
h66 -69-67 -65-62-57 -52-46 -40-33-39 -30-24 -17-71 1117 212436 43.850.94 55.4062.6 1.0
g70 7070 717273 7374 747470 6565 677572 7172 747777 79.079.88 80.4481.6 0.3
g71 -55-54 -54-54-54 -54-54 -53-53-40 -55-56 -56-57-57 -56-59 -62-64-72 -74.0-74.46 -75.00-76.1 -0.2
h71 -45-46 -47-48-49 -50-51 -52-52-45 -35-50 -55-61-70 -77-82 -83-80-69 -64.6-61.14 -57.80-54.1 0.8
g72 001 223 444 022 541 123 21 0.0-1.65-4.55 -6.8-0.5
h72 -13-14 -14-14-14 -14-15 -17-18-18 -17-24 -28-27-27 -26-27 -27-26-25 -24.2-22.57 -21.20-19.5 0.4
g73 3433 323129 2725 23200 110 151314 1621 242628 33.338.73 45.2451.8 1.3
h73 -10-11 -12-12-13 -14-14 -14-142 0-4 -6-2-4 -5-5 -204 6.26.82 6.545.7-0.2
g74 -41-41 -40-38-37 -35-34 -33-31-29 -40-32 -32-26-22 -14-12 -6-15 9.112.30 14.0015.00.1
h74 -10 124 567 7610 876 810 162021 2424.0 25.3524.9624.4 -0.3
g75 -21-20 -19-18-16 -14-12 -11-9-10 -7-11 -7-6-2 014 54 6.99.3710.46 9.4-0.6
h75 2828 282828 2929 292928 3628 232623 2218 171717 14.810.93 7.033.4 -0.6
g76 1818 181919 1918 181715 59 171313 1211 1098 7.35.42 1.64-2.8-0.8
h76 -12-12 -13-15-16 -17-18 -19-20-17 -18-20 -18-23-23 -23-23 -23-23-24 -25.4-26.32 -27.61-27.4 0.1
g77 666 666 665 2919 1881 -2-5 -200 -2-1.2 1.944.926.8 0.2
h77 -22-22 -22-22-22 -21-20 -19-19-22 -16-18 -17-12-11 -12-10 -7-4-6 -5.8-4.64 -3.28-2.2 -0.2
g80 1111 111111 1111 111113 2211 151314 1418 212325 24.424.80 24.4124.2 0.2
g81 888 877 777 715 965 666 656 6.67.628.21 8.80.0
h81 888 888 888 125 10117 767 810 1111.911.20 10.8410.1 -0.3
g82 -4-4 -4-4-3 -3-3 -3-3-8 -4-6 -4-4-2 -10 0-1-6 -9.2-11.73 -14.50-16.9 -0.6
h82 -14-15 -15-15-15 -15-15 -15-14-21 -22-15 -14-12-15 -16-18 -19-19-21 -21.5-20.88 -20.03-18.3 0.3
g83 -9-9 -9-9-9 -9-9 -9-10-5 -1-14 -11-14-13 -12-11 -11-10-9 -7.9-6.88 -5.59-3.2 0.5
h83 776 666 555 -120 579 644 568 8.59.8311.83 13.30.1
g84 111 222 211 911 620 -3-8-7 -9-12 -14-16.6-18.11 -19.34-20.6 -0.2
h84 -13-13 -13-13-14 -14-14 -15-15-7 -21-23 -18-16-17 -19-22 -23-22-23 -21.5-19.71 -17.41-14.6 0.5
g85 222 344 566 715 10108 544 439 9.110.17 11.6113.40.4
h85 555 555 555 2-8 344 669 111215 15.516.22 16.7116.2 -0.2
g86 -9-8 -8-8-7 -7-6 -6-5-10 -13-7 -5-10 034 46 7.09.3610.85 11.70.1
h86 1616 161617 1718 181918 1723 232421 1816 141211 8.97.61 6.965.7-0.3
g87 555 667 889 756 1011 11106 42 -5-7.9-11.25 -14.05-15.9 -0.4
h87 -5-5 -5-5-5 -5-5 -5-53 -4-4 1-3-6 -10-13 -15-16-16 -14.9-12.76 -10.74-9.1 0.3
g88 888 888 877 2-1 984 31-1 -4-6 -7-7.0-4.87 -3.54-2.0 0.3
h88 -18-18 -18-18-19 -19-19 -19-19-11 -17-13 -20-17-16 -17-15 -11-10-4 -2.1-0.06 1.642.1 0.0
g90 888 888 888 534 488 755 44 5.05.585.50 5.40.0
g91 1010 101010 1010 1010-21 -79 61010 1010 1099 9.49.76 9.458.80.0
h91 -20-20 -20-20-20 -20-20 -20-21-27 -24-11 -18-22-21 -21-21 -21-20-20 -19.7-20.11 -20.54-21.6 0.0
g92 111 111 111 1-1 -402 221 113 3.03.58 3.453.10.0
h92 1414 141414 1414 151517 1912 121516 1616 151515 13.412.69 11.5110.8 0.0
g93 -11-11 -11-11-11 -11-12 -12-12-11 -25-5 -9-13-12 -12-12 -12-12-10 -8.4-6.94 -5.27-3.3 0.0
h93 555 555 555 2912 727 679 91112 12.512.67 12.7511.8 0.0
g94 1212 121212 1212 11113 102 11010 109 998 6.35.013.13 0.70.0
h94 -3-3 -3-3-3 -3-3 -3-3-9 260 -4-4 -4-5-6 -7-6 -6.2-6.72-7.14 -6.80.0
g95 111 111 111 165 44-1 -1-1 -3-3-4 -8-8.9 -10.76-12.38-13.3 0.0
h95 -2-2 -2-2-2 -2-2 -3-34 2-2 -3-5-5 -5-6 -6-7-8 -8.4-8.16 -7.42-6.9 0.0
g96 -2-2 -2-2-2 -2-2 -2-2-3 -51 -1-10 -1-1 -1-2-1 -1.5-1.25 -0.76-0.1 0.0
h96 888 899 999 98 10910 1010 999 88.48.10 7.977.8 0.0
g97 222 222 333 -4-2 2-25 347 77 109.38.76 8.438.7 0.0
h97 1010 101010 1010 11116 878 1011 11109 85 3.82.922.14 1.00.0
g98 -10 000 000 1-33 231 112 11 -2-4.3-6.66 -8.42-9.1 0.0
h98 -2-2 -2-2-2 -2-2 -2-21 -11-6 0-4-2 -3-6 -7-7-8 -8.2-7.73 -6.08-4.0 0.0
g99 -1-1 -1-1-1 -1-2 -2-2-4 85 -1-2-1 -2-5 -5-6-8 -8.2-9.22 -10.08-10.5 0.0
h99 222 222 222 8-7 551 112 223 4.86.017.01 8.40.0
g100 -3-3 -3-3-3 -3-3 -3-3-3 -8-3 1-2-3 -3-4 -4-3-3 -2.6-2.17 -1.94-1.9 0.0
g101 -4-4 -4-4-4 -4-4 -4-411 4-5 -3-3-3 -3-4 -4-4-6 -6.0-6.12 -6.24-6.3 0.0
h101 222 222 222 513 -442 111 121 1.72.19 2.733.20.0
g102 222 222 222 1-1 -142 222 322 1.71.42 0.890.10.0
h102 111 111 111 1-2 011 110 010 0.00.10-0.10 -0.40.0
g103 -5-5 -5-5-5 -5-5 -5-52 132 0-5-5 -5-5 -5-5-4 -3.1-2.35 -1.070.5 0.0
h103 222 222 222 -20-10 -802 333 334 4.04.46 4.714.60.0
g104 -2-2 -2-2-2 -2-2 -2-2-5 -4-3 -1-2-1 -2-2 -2-2-1 -0.5-0.15 -0.16-0.5 0.0
h104 666 666 666 -12 -226 446 665 4.94.76 4.444.40.0
g105 666 666 666 -14 744 655 544 3.73.062.45 1.80.0
h105 -4-4 -4-4-4 -4-4 -4-4-6 -3-4 -5-4-4 -4-4 -4-4-5 -5.9-6.58 -7.22-7.9 0.0
g106 444 444 444 812 464 443 332 1.00.29-0.33 -0.70.0
h106 000 000 000 661 100 -10 00-1 -1.2-1.01 -0.96-0.6 0.0
g107 000 000 000 -13 -210 111 112 2.02.06 2.132.10.0
h107 -2-2 -2-2-2 -2-2 -1-1-4 -3-3 -1-2-1 -1-1 -1-2-2 -2.9-3.47 -3.95-4.2 0.0
g108 222 111 122 -32 6-12 002 235 4.23.77 3.092.40.0
h108 444 444 444 -26 763 334 431 0.2-0.86-1.99 -2.80.0
g109 222 233 333 510 -222 333 331 0.3-0.21 -1.03-1.80.0
h109 000 000 000 011 -100 110 0-1 -2-2.2-2.31 -1.97-1.2 0.0
g1010 000 000 000 -23 000 -1-10 000 -1.1-2.09 -2.80-3.6 0.0
h1010 -6-6 -6-6-6 -6-6 -6-6-2 8-3 -7-6-4 -5-6 -6-6-7 -7.4-7.93 -8.31-8.7 0.0
g110 000 000 000 000 000 000 00 2.72.953.05 3.10.0
g111 000 000 000 000 000 000 00 -1.7-1.60-1.48 -1.50.0
h111 000 000 000 000 000 000 00 0.10.260.13 -0.10.0
g112 000 000 000 000 000 000 00 -1.9-1.88-2.03 -2.30.0
h112 000 000 000 000 000 000 00 1.31.441.67 2.00.0
g113 000 000 000 000 000 000 00 1.51.441.65 2.00.0
h113 000 000 000 000 000 000 00 -0.9-0.77-0.66 -0.70.0
g114 000 000 000 000 000 000 00 -0.1-0.31-0.51 -0.80.0
h114 000 000 000 000 000 000 00 -2.6-2.27-1.76 -1.10.0
g115 000 000 000 000 000 000 00 0.10.290.54 0.60.0
h115 000 000 000 000 000 000 00 0.90.900.85 0.80.0
g116 000 000 000 000 000 000 00 -0.7-0.79-0.79 -0.70.0
h116 000 000 000 000 000 000 00 -0.7-0.58-0.39 -0.20.0
g117 000 000 000 000 000 000 00 0.70.530.37 0.20.0
h117 000 000 000 000 000 000 00 -2.8-2.69-2.51 -2.20.0
g118 000 000 000 000 000 000 00 1.71.801.79 1.70.0
h118 000 000 000 000 000 000 00 -0.9-1.08-1.27 -1.40.0
g119 000 000 000 000 000 000 00 0.10.160.12 -0.20.0
h119 000 000 000 000 000 000 00 -1.2-1.58-2.11 -2.50.0
g1110 000 000 000 000 000 000 00 1.20.960.75 0.40.0
h1110 000 000 000 000 000 000 00 -1.9-1.90-1.94 -2.00.0
g1111 000 000 000 000 000 000 00 4.03.993.75 3.50.0
h1111 000 000 000 000 000 000 00 -0.9-1.39-1.86 -2.40.0
g120 000 000 000 000 000 000 00 -2.2-2.15-2.12 -1.90.0
g121 000 000 000 000 000 000 00 -0.3-0.29-0.21 -0.20.0
h121 000 000 000 000 000 000 00 -0.4-0.55-0.87 -1.10.0
g122 000 000 000 000 000 000 00 0.20.210.30 0.40.0
h122 000 000 000 000 000 000 00 0.30.230.27 0.40.0
g123 000 000 000 000 000 000 00 0.90.891.04 1.20.0
h123 000 000 000 000 000 000 00 2.52.382.13 1.90.0
g124 000 000 000 000 000 000 00 -0.2-0.38-0.63 -0.80.0
h124 000 000 000 000 000 000 00 -2.6-2.63-2.49 -2.20.0
g125 000 000 000 000 000 000 00 0.90.960.95 0.90.0
h125 000 000 000 000 000 000 00 0.70.610.49 0.30.0
g126 000 000 000 000 000 000 00 -0.5-0.30-0.11 0.10.0
h126 000 000 000 000 000 000 00 0.30.400.59 0.70.0
g127 000 000 000 000 000 000 00 0.30.460.52 0.50.0
h127 000 000 000 000 000 000 00 0.00.010.00 -0.10.0
g128 000 000 000 000 000 000 00 -0.3-0.35-0.39 -0.30.0
h128 000 000 000 000 000 000 00 0.00.020.13 0.30.0
g129 000 000 000 000 000 000 00 -0.4-0.36-0.37 -0.40.0
h129 000 000 000 000 000 000 00 0.30.280.27 0.20.0
g1210 000 000 000 000 000 000 00 -0.10.080.21 0.20.0
h1210 000 000 000 000 000 000 00 -0.9-0.87-0.86 -0.90.0
g1211 000 000 000 000 000 000 00 -0.2-0.49-0.77 -0.90.0
h1211 000 000 000 000 000 000 00 -0.4-0.34-0.23 -0.10.0
g1212 000 000 000 000 000 000 00 -0.4-0.080.04 0.00.0
h1212 000 000 000 000 000 000 00 0.80.880.87 0.70.0
g130 000 000 000 000 000 000 00 -0.2-0.16-0.09 0.00.0
g131 000 000 000 000 000 000 00 -0.9-0.88-0.89 -0.90.0
h131 000 000 000 000 000 000 00 -0.9-0.76-0.87 -0.90.0
g132 000 000 000 000 000 000 00 0.30.300.31 0.40.0
h132 000 000 000 000 000 000 00 0.20.330.30 0.40.0
g133 000 000 000 000 000 000 00 0.10.280.42 0.50.0
h133 000 000 000 000 000 000 00 1.81.721.66 1.60.0
g134 000 000 000 000 000 000 00 -0.4-0.43-0.45 -0.50.0
h134 000 000 000 000 000 000 00 -0.4-0.54-0.59 -0.50.0
g135 000 000 000 000 000 000 00 1.31.181.08 1.00.0
h135 000 000 000 000 000 000 00 -1.0-1.07-1.14 -1.20.0
g136 000 000 000 000 000 000 00 -0.4-0.37-0.31 -0.20.0
h136 000 000 000 000 000 000 00 -0.1-0.04-0.07 -0.10.0
g137 000 000 000 000 000 000 00 0.70.750.78 0.80.0
h137 000 000 000 000 000 000 00 0.70.630.54 0.40.0
g138 000 000 000 000 000 000 00 -0.4-0.26-0.18 -0.10.0
h138 000 000 000 000 000 000 00 0.30.210.10 -0.10.0
g139 000 000 000 000 000 000 00 0.30.350.38 0.30.0
h139 000 000 000 000 000 000 00 0.60.530.49 0.40.0
g1310 000 000 000 000 000 000 00 -0.1-0.050.02 0.10.0
h1310 000 000 000 000 000 000 00 0.30.380.44 0.50.0
g1311 000 000 000 000 000 000 00 0.40.410.42 0.50.0
h1311 000 000 000 000 000 000 00 -0.2-0.22-0.25 -0.30.0
g1312 000 000 000 000 000 000 00 0.0-0.10-0.26 -0.40.0
h1312 000 000 000 000 000 000 00 -0.5-0.57-0.53 -0.40.0
g1313 000 000 000 000 000 000 00 0.1-0.18-0.26 -0.30.0
h1313 000 000 000 000 000 000 00 -0.9-0.82-0.79 -0.80.0