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    [ LRI | IME | IC/MAA ]

    Bulletin magnétique disposé par l'I.O.G.A.

    Vous pouvez obtenir les données géomagnétiques de l'observatoire d'Antananarivo. Pour les données antérieures, veuillez nous contacter par e-mail.

    DECEMBRE 1997

    Les valeurs ci-dessous sont des valeurs moyennes horaires

    Legendes:

    • Composante horizontale nord (X).
    • Composante horizontale est (Y).
    • Composante verticale (Z).
    • Champ magnétique total (F).

    Vous pouvez aussi charger les courbes correspondantes(7ko)     
    MEAN HOURLY VALUES           Tananarive   DECEMBER 01, 1997 day 335
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197500
	  Hour 00 197459 197465 197457 197454 197479 999999 197512 197580
	       08 197632 197634 197668 197634 197562 197445 197366 197374
	       16 197426 197450 197460 197479 197465 197487 197511 197515

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50958
	  Hour 00 -51026 -51055 -51109 -51245 -51300 999999 -51159 -51055
	       08 -50881 -50736 -50647 -50662 -50759 -50865 -50931 -50931
	       16 -50930 -50934 -50938 -50957 -50981 -50980 -50973 -50984

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268076
	  Hour 00-268152-268152-268153-268132-268079 999999-267990-267997
	       08-267978-267955-267977-268029-268082-268101-268094-268090
	       16-268090-268086-268085-268087-268092-268106-268125-268135

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336850
	  Hour 00 336898 336907 336911 336913 336893 999999 336817 336848
	       08 336837 336797 336822 336846 336861 336822 336780 336781
	       16 336812 336824 336830 336846 336845 336870 336898 336911


MEAN HOURLY VALUES           Tananarive   DECEMBER 02, 1997 day 336
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197492
	  Hour 00 197492 197491 197488 197501 197483 197473 197481 197514
	       08 197501 197522 197539 197508 197404 197386 197442 197474
	       16 197482 197470 197482 197473 197506 197526 197578 197612

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50998
	  Hour 00 -51007 -51025 -51037 -51093 -51137 -51158 -51125 -51126
	       08 -51101 -50997 -50894 -50785 -50770 -50854 -50940 -50982
	       16 -50981 -50963 -50961 -50977 -51007 -50997 -51005 -51048

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268121
	  Hour 00-268143-268146-268149-268175-268190-268190-268185-268134
	       08-268079-268044-268057-268113-268147-268139-268114-268110
	       16-268098-268095-268093-268092-268089-268102-268113-268119

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336888
	  Hour 00 336907 336912 336915 336952 336961 336958 336954 336931
	       08 336875 336842 336847 336858 336821 336816 336842 336864
	       16 336859 336846 336852 336848 336871 336891 336933 336965


MEAN HOURLY VALUES           Tananarive   DECEMBER 03, 1997 day 337
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197488
	  Hour 00 197532 197480 197467 197499 197490 197499 197501 197575
	       08 197669 197699 197658 197571 197450 197425 197406 197402
	       16 197372 197360 197391 197422 197456 197466 197468 197462

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50968
	  Hour 00 -51050 -51050 -51040 -51077 -51164 -51214 -51241 -51170
	       08 -50943 -50778 -50678 -50654 -50711 -50836 -50921 -50930
	       16 -50910 -50930 -50957 -50979 -50989 -50994 -51002 -51029

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268070
	  Hour 00-268130-268139-268149-268169-268154-268113-268043-267954
	       08-267846-267862-267936-267982-268058-268089-268094-268100
	       16-268114-268113-268112-268100-268096-268101-268112-268122

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336837
	  Hour 00 336926 336903 336903 336944 336939 336919 336866 336826
	       08 336759 336763 336784 336766 336765 336794 336799 336804
	       16 336795 336789 336811 336823 336842 336853 336864 336873


MEAN HOURLY VALUES           Tananarive   DECEMBER 04, 1997 day 338
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197493
	  Hour 00 197453 197463 197461 197463 197447 197469 197526 197628
	       08 197643 197634 197605 197559 197507 197505 197483 197446
	       16 197452 197412 197410 197430 197440 197444 197478 197497

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50965
	  Hour 00 -51022 -51033 -51033 -51050 -51076 -51106 -51111 -51046
	       08 -50903 -50796 -50728 -50727 -50795 -50883 -50933 -50929
	       16 -50938 -50942 -50973 -50986 -51007 -51042 -51060 -51054

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268120
	  Hour 00-268137-268146-268160-268190-268166-268094-268053-268034
	       08-268049-268070-268090-268129-268146-268138-268145-268143
	       16-268135-268134-268128-268121-268117-268113-268117-268129

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336880
	  Hour 00 336879 336895 336906 336934 336910 336867 336869 336904
	       08 336903 336898 336886 336890 336883 336888 336888 336864
	       16 336862 336839 336838 336845 336851 336856 336882 336903


MEAN HOURLY VALUES           Tananarive   DECEMBER 05, 1997 day 339
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197402
	  Hour 00 197483 197468 197497 197548 197569 197512 197469 197422
	       08 197369 197324 197311 197341 197410 197442 197382 197224
	       16 197265 197345 197392 197387 197404 197401 197325 197361

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50973
	  Hour 00 -51077 -51083 -51124 -51143 -51167 -51148 -51129 -51051
	       08 -50934 -50806 -50719 -50676 -50724 -50796 -50904 -50921
	       16 -50908 -50929 -50968 -51008 -51030 -51038 -51045 -51038

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268125
	  Hour 00-268133-268140-268157-268157-268140-268145-268125-268108
	       08-268101-268089-268097-268098-268108-268117-268130-268140
	       16-268143-268142-268134-268124-268118-268116-268122-268133

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336831
	  Hour 00 336901 336900 336938 336972 336974 336941 336895 336842
	       08 336786 336730 336715 336727 336783 336821 336811 336728
	       16 336753 336803 336831 336826 336834 336833 336793 336823


MEAN HOURLY VALUES           Tananarive   DECEMBER 06, 1997 day 340
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197451
	  Hour 00 197370 197397 197423 197435 197479 197494 197530 197488
	       08 197471 197478 197477 197427 197414 197390 197395 197432
	       16 197427 197446 197447 197466 197455 197465 197498 197522

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50959
	  Hour 00 -51055 -51060 -51030 -51053 -51040 -51019 -51004 -50958
	       08 -50891 -50845 -50776 -50736 -50765 -50854 -50925 -50965
	       16 -50970 -50980 -50986 -51005 -51017 -51020 -51027 -51054

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268147
	  Hour 00-268140-268150-268159-268166-268170-268169-268192-268200
	       08-268171-268160-268149-268145-268137-268140-268138-268136
	       16-268138-268137-268136-268130-268124-268120-268120-268119

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336876
	  Hour 00 336837 336862 336881 336897 336925 336930 336967 336941
	       08 336896 336885 336864 336824 336815 336816 336828 336855
	       16 336855 336867 336867 336877 336867 336871 336891 336909


MEAN HOURLY VALUES           Tananarive   DECEMBER 07, 1997 day 341
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197509
	  Hour 00 197525 197529 197540 197543 197561 197602 197618 197518
	       08 197405 197386 197428 197463 197479 197512 197553 197541
	       16 197538 197525 197500 197479 197480 197489 197503 197499

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50990
	  Hour 00 -51066 -51080 -51086 -51077 -51060 -51054 -51086 -51143
	       08 -51089 -50991 -50870 -50779 -50761 -50796 -50864 -50940
	       16 -50960 -50968 -50983 -50997 -51018 -51031 -51036 -51045

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268121
	  Hour 00-268123-268126-268130-268139-268162-268210-268191-268145
	       08-268118-268075-268042-268065-268083-268095-268104-268113
	       16-268113-268123-268131-268130-268125-268123-268122-268121

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336893
	  Hour 00 336916 336923 336935 336942 336970 337033 337031 336942
	       08 336844 336782 336762 336787 336808 336843 336886 336897
	       16 336899 336901 336895 336884 336883 336888 336897 336896


MEAN HOURLY VALUES           Tananarive   DECEMBER 08, 1997 day 342
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197538
	  Hour 00 197505 197521 197552 197605 197644 197629 197592 197547
	       08 197527 197477 197438 197426 197444 197504 197558 197562
	       16 197553 197556 197554 197538 197544 197547 197547 197545

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51002
	  Hour 00 -51050 -51057 -51068 -51062 -51048 -51010 -50998 -51020
	       08 -51029 -51030 -50994 -50907 -50861 -50881 -50934 -50973
	       16 -50970 -50975 -50995 -51017 -51035 -51047 -51049 -51051

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268126
	  Hour 00-268122-268124-268129-268142-268182-268217-268193-268155
	       08-268141-268122-268074-268068-268093-268094-268106-268103
	       16-268107-268115-268124-268126-268127-268125-268121-268117

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336916
	  Hour 00 336901 336913 336938 336979 337034 337048 337004 336949
	       08 336926 336881 336813 336786 336811 336850 336901 336907
	       16 336904 336914 336924 336920 336927 336930 336926 336921


MEAN HOURLY VALUES           Tananarive   DECEMBER 09, 1997 day 343
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197571
	  Hour 00 197546 197540 197563 197611 197661 197675 197688 197703
	       08 197635 197580 197567 197534 197515 197534 197557 197532
	       16 197525 197525 197494 197523 197545 197553 197553 197561

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51000
	  Hour 00 -51050 -51053 -51052 -51031 -51004 -50959 -50984 -51057
	       08 -51112 -51070 -50978 -50891 -50869 -50893 -50904 -50952
	       16 -50973 -51002 -51019 -51018 -51026 -51032 -51036 -51043

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268104
	  Hour 00-268114-268110-268111-268107-268077-268086-268091-268057
	       08-268071-268096-268098-268084-268092-268102-268103-268107
	       16-268105-268108-268118-268129-268133-268134-268134-268132

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336921
	  Hour 00 336919 336913 336928 336950 336952 336963 336978 336971
	       08 336949 336930 336910 336866 336858 336880 336897 336893
	       16 336890 336898 336890 336916 336934 336941 336942 336946


MEAN HOURLY VALUES           Tananarive   DECEMBER 10, 1997 day 344
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197394
	  Hour 00 197569 197565 197598 197619 197698 197888 198018 198024
	       08 197985 197858 197785 197448 197226 197127 196954 196757
	       16 196851 196952 197094 196961 196956 197086 197262 197194

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50941
	  Hour 00 -51046 -51061 -51136 -51182 -51105 -51066 -51083 -51035
	       08 -50989 -50971 -50916 -50761 -50692 -50722 -50753 -50706
	       16 -50799 -50882 -50951 -50937 -50949 -50973 -50964 -50907

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268144
	  Hour 00-268123-268115-268111-268087-268061-268053-268047-268058
	       08-268096-268125-268123-268164-268163-268169-268179-268193
	       16-268189-268187-268188-268203-268211-268212-268202-268200

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336841
	  Hour 00 336944 336937 336966 336966 336979 337081 337156 337161
	       08 337162 337107 337054 336861 336718 336668 336578 336466
	       16 336533 336604 336700 336631 336636 336718 336814 336763


MEAN HOURLY VALUES           Tananarive   DECEMBER 11, 1997 day 345
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197241
	  Hour 00 197177 197178 197227 197269 197365 197409 197485 197437
	       08 197358 197224 197071 196941 196910 197035 197196 197181
	       16 197235 197268 197254 197302 197285 197307 197327 197350

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50918
	  Hour 00 -50918 -50924 -50989 -51020 -51027 -51025 -51024 -50974
	       08 -50881 -50815 -50763 -50728 -50723 -50819 -50892 -50931
	       16 -50918 -50924 -50937 -50977 -50951 -50955 -50956 -50963

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268158
	  Hour 00-268194-268186-268172-268176-268154-268142-268174-268143
	       08-268160-268165-268207-268223-268182-268126-268112-268110
	       16-268112-268120-268133-268137-268152-268168-268179-268180

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336756
	  Hour 00 336749 336744 336772 336805 336845 336862 336933 336871
	       08 336823 336738 336673 336603 336549 336589 336684 336680
	       16 336711 336739 336743 336781 336780 336806 336828 336843


MEAN HOURLY VALUES           Tananarive   DECEMBER 12, 1997 day 346
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197447
	  Hour 00 197353 197334 197362 197382 197415 197471 197592 197689
	       08 197707 197653 197600 197471 197342 197324 197365 197371
	       16 197362 197395 197414 197417 197413 197423 197441 197440

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50942
	  Hour 00 -50974 -51020 -51066 -51123 -51122 -51031 -50928 -50783
	       08 -50665 -50664 -50739 -50821 -50882 -50926 -50965 -50975
	       16 -50968 -50963 -50977 -50986 -50989 -51005 -51015 -51032

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268154
	  Hour 00-268175-268160-268153-268152-268126-268149-268167-268135
	       08-268135-268154-268192-268218-268215-268176-268141-268126
	       16-268121-268123-268127-268135-268150-268159-268163-268164

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336876
	  Hour 00 336843 336826 336844 336865 336863 336900 336972 336981
	       08 336974 336956 336966 336923 336853 336817 336818 336812
	       16 336801 336821 336838 336848 336859 336874 336890 336893


MEAN HOURLY VALUES           Tananarive   DECEMBER 13, 1997 day 347
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197502
	  Hour 00 197438 197430 197415 197400 197446 197517 197605 197673
	       08 197647 197660 197681 197641 197537 197456 197425 197413
	       16 197430 197443 197456 197459 197457 197460 197475 197485

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51014
	  Hour 00 -51037 -51048 -51106 -51206 -51250 -51232 -51212 -51107
	       08 -50901 -50764 -50823 -50923 -50955 -50968 -50988 -50991
	       16 -50978 -50970 -50967 -50975 -50978 -50983 -50988 -51000

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268091
	  Hour 00-268162-268157-268154-268141-268113-268068-268006-267994
	       08-267954-267913-268028-268111-268114-268105-268107-268100
	       16-268095-268097-268104-268111-268123-268137-268151-268160

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336868
	  Hour 00 336891 336885 336882 336878 336889 336892 336890 336905
	       08 336825 336777 336893 336952 336897 336843 336830 336817
	       16 336822 336829 336843 336852 336861 336875 336896 336912


MEAN HOURLY VALUES           Tananarive   DECEMBER 14, 1997 day 348
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197587
	  Hour 00 197488 197496 197498 197513 197489 197499 197541 197614
	       08 197630 197601 197646 197660 197641 197645 197661 197631
	       16 197608 197617 197612 197610 197616 197605 197589 197580

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51014
	  Hour 00 -51022 -51053 -51079 -51172 -51236 -51230 -51178 -51086
	       08 -50892 -50719 -50719 -50855 -50931 -50963 -50969 -51004
	       16 -51002 -50994 -50996 -51007 -51026 -51044 -51068 -51096

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268096
	  Hour 00-268162-268156-268150-268126-268083-268081-268076-268041
	       08-268027-268042-268100-268104-268078-268080-268085-268085
	       16-268077-268081-268089-268096-268105-268117-268128-268138

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336923
	  Hour 00 336919 336924 336924 336929 336888 336892 336905 336906
	       08 336874 336841 336915 336949 336927 336936 336951 336938
	       16 336918 336926 336929 336936 336950 336955 336959 336967


MEAN HOURLY VALUES           Tananarive   DECEMBER 15, 1997 day 349
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197595
	  Hour 00 197567 197570 197567 197597 197622 197610 197684 197792
	       08 197817 197777 197813 197773 197635 197541 197489 197476
	       16 197449 197420 197484 197497 197514 197519 197540 197541

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51005
	  Hour 00 -51120 -51139 -51177 -51262 -51272 -51198 -51119 -51038
	       08 -50833 -50718 -50685 -50728 -50827 -50926 -50996 -50990
	       16 -50969 -50991 -50987 -50998 -51016 -51023 -51044 -51070

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268120
	  Hour 00-268143-268144-268147-268157-268127-268070-268083-268103
	       08-268100-268115-268145-268136-268143-268136-268118-268110
	       16-268112-268103-268103-268105-268109-268118-268130-268139

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336947
	  Hour 00 336968 336973 336979 337019 337010 336946 336988 337056
	       08 337037 337009 337049 337023 336961 336914 336879 336864
	       16 336847 336826 336863 336875 336890 336903 336928 336941


MEAN HOURLY VALUES           Tananarive   DECEMBER 16, 1997 day 350
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197530
	  Hour 00 197547 197542 197533 197536 197536 197555 197623 197634
	       08 197575 197557 197633 197641 197536 197459 197475 197529
	       16 197521 197484 197479 197494 197461 197453 197474 197454

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51004
	  Hour 00 -51099 -51119 -51138 -51196 -51209 -51133 -51067 -51018
	       08 -50893 -50770 -50780 -50823 -50851 -50919 -50978 -50986
	       16 -50989 -50979 -50975 -50995 -50998 -51038 -51077 -51078

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268119
	  Hour 00-268144-268145-268150-268155-268134-268143-268112-268098
	       08-268065-268058-268064-268106-268127-268145-268133-268130
	       16-268120-268112-268113-268112-268116-268122-268129-268146

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336908
	  Hour 00 336954 336955 336957 336972 336956 336964 336967 336956
	       08 336874 336838 336890 336935 336894 336873 336881 336912
	       16 336899 336870 336867 336878 336863 336869 336893 336896


MEAN HOURLY VALUES           Tananarive   DECEMBER 17, 1997 day 351
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197611
	  Hour 00 197487 197502 197559 197635 197709 197764 197796 197800
	       08 197783 197783 197805 197747 197654 197561 197501 197510
	       16 197515 197518 197516 197498 197507 197535 197509 197486

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51042
	  Hour 00 -51098 -51118 -51178 -51183 -51170 -51133 -51115 -51080
	       08 -51041 -50986 -50954 -50953 -50972 -50989 -50984 -50958
	       16 -50952 -50976 -50990 -50991 -51016 -51048 -51065 -51067

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268124
	  Hour 00-268159-268163-268155-268127-268104-268107-268088-268085
	       08-268075-268127-268119-268136-268150-268148-268142-268136
	       16-268131-268121-268117-268114-268108-268110-268121-268136

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336966
	  Hour 00 336929 336945 336982 337006 337029 337059 337059 337053
	       08 337029 337063 337065 337042 337001 336947 336905 336901
	       16 336899 336897 336895 336882 336885 336909 336906 336905


MEAN HOURLY VALUES           Tananarive   DECEMBER 18, 1997 day 352
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197531
	  Hour 00 197495 197486 197472 197512 197609 197764 197757 197652
	       08 197567 197586 197605 197575 197545 197513 197502 197477
	       16 197474 197467 197447 197445 197413 197422 197459 197521

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50991
	  Hour 00 -51076 -51118 -51162 -51174 -51096 -50981 -50932 -50919
	       08 -50958 -50937 -50874 -50834 -50838 -50895 -50944 -50964
	       16 -50975 -50990 -51000 -51007 -51012 -51024 -51036 -51051

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268141
	  Hour 00-268149-268156-268159-268145-268155-268144-268155-268167
	       08-268147-268111-268138-268140-268120-268124-268148-268148
	       16-268143-268139-268136-268132-268132-268134-268137-268142

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336924
	  Hour 00 336923 336929 336931 336945 336999 337065 337063 337007
	       08 336945 336924 336947 336923 336890 336883 336903 336892
	       16 336888 336882 336869 336866 336848 336857 336884 336927


MEAN HOURLY VALUES           Tananarive   DECEMBER 19, 1997 day 353
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197610
	  Hour 00 197574 197569 197550 197571 197614 197654 197680 197721
	       08 197732 197716 197700 197679 197646 197631 197559 197545
	       16 197551 197562 197556 197570 197531 197564 197593 197574

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51041
	  Hour 00 -51059 -51063 -51066 -51070 -51127 -51183 -51203 -51171
	       08 -51128 -51055 -50975 -50914 -50907 -50942 -50988 -50999
	       16 -51003 -50997 -50999 -51000 -51018 -51041 -51035 -51046

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268124
	  Hour 00-268153-268158-268156-268158-268163-268167-268170-268150
	       08-268129-268071-268065-268081-268097-268116-268110-268117
	       16-268120-268121-268117-268115-268112-268107-268111-268116

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336964
	  Hour 00 336970 336972 336959 336975 337013 337049 337070 337074
	       08 337055 336987 336960 336950 336943 336954 336912 336913
	       16 336920 336926 336920 336927 336904 336923 336943 336938


MEAN HOURLY VALUES           Tananarive   DECEMBER 20, 1997 day 354
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197664
	  Hour 00 197579 197578 197582 197636 197748 197839 197870 197878
	       08 197896 197814 197731 197703 197675 197624 197595 197587
	       16 197582 197572 197563 197578 197624 197590 197558 197542

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51021
	  Hour 00 -51074 -51090 -51094 -51059 -51022 -51002 -51075 -51096
	       08 -51079 -51027 -50962 -50895 -50833 -50864 -50938 -51001
	       16 -51021 -51029 -51028 -51042 -51087 -51073 -51062 -51052

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268141
	  Hour 00-268123-268130-268131-268136-268147-268194-268224-268212
	       08-268172-268161-268157-268141-268140-268142-268115-268121
	       16-268118-268117-268119-268118-268109-268112-268118-268129

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 337008
	  Hour 00 336951 336959 336963 336993 337064 337154 337208 337206
	       08 337182 337114 337052 337011 336984 336959 336932 336942
	       16 336940 336935 336931 336941 336968 336948 336932 336931


MEAN HOURLY VALUES           Tananarive   DECEMBER 21, 1997 day 355
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197617
	  Hour 00 197571 197625 197634 197649 197680 197742 197730 197672
	       08 197681 197655 197648 197667 197656 197617 197540 197519
	       16 197556 197598 197556 197534 197559 197573 197568 197584

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51038
	  Hour 00 -51067 -51107 -51113 -51130 -51142 -51176 -51241 -51119
	       08 -50962 -50924 -50874 -50856 -50878 -50963 -51020 -51018
	       16 -50997 -51024 -51027 -51021 -51035 -51065 -51070 -51084

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268124
	  Hour 00-268136-268128-268134-268157-268181-268176-268125-268060
	       08-268083-268089-268095-268102-268106-268139-268145-268125
	       16-268130-268126-268127-268130-268129-268120-268119-268119

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336970
	  Hour 00 336956 336989 337000 337031 337071 337109 337070 336963
	       08 336963 336947 336939 336954 336953 336969 336937 336908
	       16 336931 336957 336934 336922 336938 336944 336941 336954


MEAN HOURLY VALUES           Tananarive   DECEMBER 22, 1997 day 356
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197645
	  Hour 00 197596 197606 197617 197631 197684 197697 197724 197817
	       08 197856 197820 197725 197662 197633 197614 197583 197574
	       16 197591 197599 197583 197559 197594 197592 197573 197554

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51045
	  Hour 00 -51110 -51129 -51133 -51141 -51167 -51226 -51256 -51197
	       08 -51066 -50946 -50896 -50854 -50811 -50853 -50932 -50989
	       16 -51003 -51005 -51018 -51046 -51061 -51069 -51082 -51100

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268097
	  Hour 00-268119-268119-268127-268152-268163-268151-268070-267951
	       08-267954-268000-268071-268086-268095-268119-268121-268114
	       16-268110-268113-268118-268118-268119-268119-268118-268116

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336966
	  Hour 00 336964 336974 336988 337018 337063 337070 337025 336973
	       08 336979 336976 336970 336937 336920 336935 336930 336928
	       16 336937 336945 336941 336932 336955 336956 336946 336936


MEAN HOURLY VALUES           Tananarive   DECEMBER 23, 1997 day 357
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197655
	  Hour 00 197553 197566 197668 197769 197813 197844 197804 197822
	       08 197819 197775 197655 197621 197635 197659 197658 197617
	       16 197576 197576 197557 197564 197560 197546 197557 197522

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51067
	  Hour 00 -51133 -51158 -51213 -51289 -51303 -51248 -51225 -51165
	       08 -51052 -50982 -50938 -50909 -50866 -50891 -50945 -51011
	       16 -51013 -51006 -51027 -51044 -51055 -51061 -51051 -51044

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268086
	  Hour 00-268112-268111-268122-268125-268109-268087-268042-268031
	       08-268054-268039-268012-267998-268039-268090-268094-268099
	       16-268101-268109-268113-268117-268119-268117-268120-268126

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336967
	  Hour 00 336938 336949 337027 337102 337117 337109 337045 337037
	       08 337037 336987 336886 336849 336883 336944 336955 336945
	       16 336923 336928 336924 336933 336935 336926 336933 336916


MEAN HOURLY VALUES           Tananarive   DECEMBER 24, 1997 day 358
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197586
	  Hour 00 197527 197521 197547 197586 197676 197746 197726 197666
	       08 197549 197549 197548 197548 197599 197628 197558 197540
	       16 197549 197536 197546 197593 197590 197584 197579 197574

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51034
	  Hour 00 -51090 -51164 -51170 -51238 -51218 -51185 -51166 -51178
	       08 -51112 -51015 -50892 -50730 -50670 -50751 -50864 -50971
	       16 -50986 -51012 -51042 -51047 -51060 -51078 -51087 -51108

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268119
	  Hour 00-268119-268102-268110-268102-268081-268133-268172-268133
	       08-268116-268154-268153-268114-268124-268131-268101-268090
	       16-268096-268106-268115-268124-268126-268125-268121-268117

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336946
	  Hour 00 336920 336915 336938 336965 336999 337078 337095 337028
	       08 336934 336950 336929 336872 336902 336937 336888 336885
	       16 336897 336902 336919 336956 336959 336956 336951 336949


MEAN HOURLY VALUES           Tananarive   DECEMBER 25, 1997 day 359
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197708
	  Hour 00 197565 197601 197606 197719 197896 197990 198043 197972
	       08 197820 197784 197741 197657 197644 197662 197621 197587
	       16 197591 197623 197622 197637 197646 197656 197654 197662

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51068
	  Hour 00 -51129 -51142 -51156 -51153 -51097 -51157 -51231 -51207
	       08 -51165 -51108 -51042 -50922 -50869 -50937 -50988 -50996
	       16 -50995 -50997 -51004 -51036 -51061 -51073 -51081 -51089

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268151
	  Hour 00-268113-268110-268112-268077-268132-268206-268241-268241
	       08-268250-268225-268210-268194-268181-268144-268130-268112
	       16-268106-268111-268119-268122-268123-268125-268125-268123

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 337050
	  Hour 00 336944 336964 336971 337009 337152 337278 337349 337303
	       08 337213 337162 337114 337032 337005 336996 336968 336935
	       16 336932 336956 336963 336980 336989 336999 336999 337004


MEAN HOURLY VALUES           Tananarive   DECEMBER 26, 1997 day 360
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197667
	  Hour 00 197634 197621 197611 197665 197833 197942 198019 197990
	       08 197858 197706 197596 197554 197564 197590 197582 197596
	       16 197593 197594 197595 197589 197573 197580 197574 197570

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51035
	  Hour 00 -51084 -51094 -51131 -51157 -51119 -51107 -51071 -51006
	       08 -51000 -51023 -51001 -50919 -50892 -50938 -50962 -50995
	       16 -51006 -51015 -51026 -51039 -51049 -51066 -51067 -51073

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268093
	  Hour 00-268124-268122-268108-268085-268059-268088-268046-268058
	       08-268080-268089-268083-268060-268075-268080-268098-268094
	       16-268087-268090-268098-268111-268122-268127-268133-268136

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336974
	  Hour 00 336987 336979 336967 336985 337059 337146 337152 337134
	       08 337072 336992 336917 336860 336874 336902 336915 336925
	       16 336920 336924 336934 336942 336944 336954 336956 336957


MEAN HOURLY VALUES           Tananarive   DECEMBER 27, 1997 day 361
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197653
	  Hour 00 197563 197563 197566 197585 197676 197795 197904 197906
	       08 197754 197639 197592 197599 197639 197656 197639 197625
	       16 197629 197627 197617 197624 197619 197620 197623 197623

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51048
	  Hour 00 -51101 -51120 -51174 -51313 -51324 -51158 -51013 -50895
	       08 -50881 -50894 -50933 -50948 -50975 -51008 -51014 -51011
	       16 -51018 -51010 -51015 -51035 -51056 -51070 -51085 -51105

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268082
	  Hour 00-268128-268119-268128-268126-268031-267988-268016-268058
	       08-268044-268066-268066-268056-268072-268091-268092-268084
	       16-268077-268079-268088-268097-268107-268114-268120-268124

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336959
	  Hour 00 336951 336948 336965 336996 336974 336985 337050 337067
	       08 336963 336913 336892 336890 336930 336961 336953 336937
	       16 336935 336935 336937 336951 336961 336969 336978 336984


MEAN HOURLY VALUES           Tananarive   DECEMBER 28, 1997 day 362
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197707
	  Hour 00 197625 197629 197640 197657 197673 197697 197755 197825
	       08 197862 197763 197647 197633 197696 197731 197741 197723
	       16 197706 197711 197728 197714 197702 197718 197711 197690

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51087
	  Hour 00 -51122 -51141 -51204 -51342 -51437 -51437 -51368 -51174
	       08 -50930 -50888 -50896 -50890 -50893 -50940 -50942 -50971
	       16 -50988 -50993 -51020 -51048 -51082 -51109 -51131 -51151

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268061
	  Hour 00-268124-268119-268125-268130-268109-268025-267942-267867
	       08-267922-268018-268028-268035-268065-268070-268067-268071
	       16-268065-268070-268075-268085-268098-268111-268119-268124

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336979
	  Hour 00 336988 336990 337011 337046 337053 336999 336955 336905
	       08 336934 336947 336886 336882 336945 336977 336981 336978
	       16 336967 336974 336993 336997 337006 337030 337036 337031


MEAN HOURLY VALUES           Tananarive   DECEMBER 29, 1997 day 363
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197674
	  Hour 00 197676 197660 197651 197669 197592 197614 197719 197812
	       08 197868 197803 197741 197715 197777 197772 197693 197613
	       16 197580 197579 197600 197608 197603 197606 197611 197623

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -51060
	  Hour 00 -51165 -51210 -51255 -51371 -51435 -51483 -51355 -50959
	       08 -50730 -50687 -50773 -50864 -50916 -50980 -51023 -51028
	       16 -51011 -51005 -51007 -51021 -51037 -51041 -51042 -51049

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268066
	  Hour 00-268128-268121-268122-268121-268090-268050-267948-267853
	       08-267900-267980-268013-268062-268092-268127-268116-268092
	       16-268084-268078-268080-268081-268093-268108-268122-268130

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336960
	  Hour 00 337027 337019 337022 337050 336989 336976 336935 336852
	       08 336889 336909 336911 336949 337020 337056 337007 336941
	       16 336911 336904 336919 336928 336936 336951 336966 336981


MEAN HOURLY VALUES           Tananarive   DECEMBER 30, 1997 day 364
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197212
	  Hour 00 197586 197587 197721 197720 197562 197421 197507 197741
	       08 197816 197624 197395 197255 197189 197111 196922 196730
	       16 196458 196502 196524 196764 196924 196977 197015 197060

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50963
	  Hour 00 -51077 -51109 -51167 -51377 -51455 -51409 -51195 -50951
	       08 -50810 -50744 -50647 -50669 -50693 -50757 -50774 -50829
	       16 -50861 -51010 -50951 -50923 -50894 -50910 -50934 -50966

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268162
	  Hour 00-268131-268130-268138-268144-268158-268167-268146-268053
	       08-268011-268060-268190-268224-268210-268162-268148-268185
	       16-268196-268183-268206-268215-268216-268209-268207-268207

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336750
	  Hour 00 336965 336968 337064 337101 337031 336947 336947 336974
	       08 336963 336878 336833 336781 336733 336656 336536 336460
	       16 336312 336350 336375 336519 336612 336640 336664 336696


MEAN HOURLY VALUES           Tananarive   DECEMBER 31, 1997 day 365
	(X) North/South Intensity in 0.1 nT     Mean Daily Value = 197277
	  Hour 00 197073 197092 197127 197153 197152 197176 197206 197272
	       08 197360 197412 197359 197278 197241 197309 197346 197346
	       16 197346 197342 197331 197329 197336 197342 197363 197379

	(Y) East / West Intensity in 0.1 nT     Mean Daily Value = -50965
	  Hour 00 -50997 -51013 -51069 -51157 -51186 -51182 -51120 -50954
	       08 -50792 -50687 -50720 -50741 -50822 -50895 -50914 -50933
	       16 -50945 -50963 -50983 -50989 -50997 -51012 -51040 -51067

	(Z) Vertical Intensity in 0.1 nT        Mean Daily Value =-268147
	  Hour 00-268206-268204-268204-268197-268183-268143-268126-268100
	       08-268097-268132-268185-268183-268147-268138-268134-268133
	       16-268124-268116-268116-268118-268122-268131-268143-268155

	(F) Total Field Intensity in 0.1 nT     Mean Daily Value = 336775
	  Hour 00 336707 336719 336748 336772 336765 336746 336740 336732
	       08 336757 336801 336817 336770 336731 336774 336797 336799
	       16 336794 336788 336784 336785 336794 336808 336834 336858

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