Aiichiro YOSHIMURA

Masaru YOSHIDA

ヨシダ マサル

ヨシムラ アイイチロウ

National Institute of Polar Research Repository

X. Geomagnetic Survey in the Mizuho Plateau-West Enderby Land Area, East Antarctica, 1 969 - 1971 Masaru YOSHIDA* and Aiichiro YOSHIMURA** 1. Introduction Measurements of geomagnetism were carried out in the Mizuho Plateau-West Enderby Land area by the oversnow traverses of JARE 10 and 11, in 1969 - 1970 and 1970 - 1971 respectively. Yoshida made the measurements along the route Syowa Station - S240 - Yamato Mountains - S 170 - Syowa Station, and Yoshimura, along the route Syowa Station -S 122 - Mizuho Camp - Y200 - Sandercock Nunataks - Mizuho Camp -S 169 - Syowa Station, as shown in Fig. A attached to the end of this volume ( Shimizu et al., 1972). Three components of geomagnetism, de­clination ( D), inclination (I) and total force ( F), were measured at 28 stations, whereas at 199 stations only total force ( F) was measured dur­ing the travels ( Table X-1 ). The results of measurements without cor­rection are given in Tables X-2 and X-3. Instruments used for the measurements were a fluxgate type magnetometer (Matsuo et al. , 1962) with the brand name of G. I. T. TR-type magnetometer, manufactured by Sokkisha Co., Japan (JARE 10), and a G.S.I. magnetometer (Tsubokawa, 1951) (JARE 11), for declina­tion D and inclination I; a proton magnetometer, GEONIX model PMM 611G (JARE 10 and 11), for total force F. Table X-1: Measurements of geomagnetism in the Mizuho Plate au-West Enderby Land area in 1969 - 1971. --1 Magne ti_c I on I Area Period Observer statl I JARE 10 M. Yoshida 8 8 JARE 11 A. Yoshimura 20 20 [1:61 M--;z:h.o Pla��au November 1969 t:{fr:��nde�- �o;�:�= 1;�: * Department of Geosciences, Osaka City University, Sumiyoshi-ku, Osaka. **Geographical Survey Institute, Ministry of Construction, Azabu likura-cho, Minato-ku, Tokyo. -·-·· 2 0 4 --2. Measurements of Geomagnetism Both D and I were measured at a distance of 100 m or more away from over snow vehicles, where the magnetic disturbance caused by vehi­cles and sledges could be negligibly small. F was measured in a over­snow vehicle setting the sensor on the snow surface 30 m away from the vehicle by JARE 10, and 50 m away by JARE 11. Procedure of measurements of 3 components of geomagnetism was as follows: i ) Measurements of F, 10 times, at intervals of 6 sec, ii ) measurements of D and I, once by JARE 10, and 4 - 8 times by JARE 11, iii) Again, measurements of F, 10 times at intervals of 6 sec. 3, Accuracy of the Measurements The reading accuracy of the instruments were O. 3' CJ ARE 10) or 0. 1 '' ( JARE 11 ) for D and I, and 1 r for F. The range of accuracy of the time ( G. M. T. ) of the measurements was 1 min. References Matsuo, T., A. Takagi and Y. Kato ( 196 2): Aeromagnetic surveys over the Oshima Island. Sci. Rep. Tohoku Univ., Ser. 5, 15(2), 65 - 80. Shimizu, H., R. Naruse, K. Omoto and A. Yoshimura (197 2 ): Position of the station, surface elevation and thickness of the ice sheet, and snow temperature at 10 m depth in the Mizuho Plateau- West Enderby Land area, East Antarctica, 1969 - 1971. JAR E Data Rep. , ..!.Z (Glaciology ), 1 2-37. Tsubokawa, H. (1951): G.S.l. travelling magnetometer. Bull. Geogr. Survey Inst. , � (4), 1 - 38. - 2 0 5 -N 0 0) Table X-2. Data of geomagnetism in Mizuho Plateau, 1969 - 1970. Station Location and elevation of the magnetic station were referred to Shimizu et al. ( 1972 ). F: total force, D: declination, I: inclination, H: horizontal component and Z: vertical component of geomagnetism. ' -------.- •.... No Latitude Longitude Elevation Date GMT F D I H z x1or XlOr x1or S yow a St. 69° 0 O'S 3 9° 3 5' E 1cf113od 69Y 18h0 4m 4 602 2 13 70 18 39 4596 2 13 70 13 48 4 6° 22'W -65° 29' 1 907 -4181 /,, 14 38 4 6 18 -65 31 1 904 -4182 S 1 7 69 01. 9 40 0 4 583m 1 29 70 7 10 4588 20 69 01. 5 40 12 653 1 29 70 6 15 4 603 22 69 01. 7 40 18 743 11 1 69 4 40 4602 25 6 9 02. 2 40 27 844 1 28 70 9 22 4647 30 6 9 03. 1 40 40 9 61 1 28 70 8 02 4 644 /,, /,, 8 15 4644 35 6 9 04. 4 40 54 1 046 1 28 70 7 08 4 661 40 6 9 04. 7 41 0 7 1112 11 2 69 1 7 0 6 4676 /,, 11 6 69 9 41 4667 /,, 1 27 70 1 6  14 4671 /,, 1 27 70 16 53 4 7 18 -66 02 1897 -4268 45 69 04. 4 41 21 1179 11 6 69 15 24 4612 /,, 1 27 70 15 13 4650 50 6 9 04. 2 41 3 5 1 215 11 6 69 17 29 4661 /,, 1 27 70 13 3 6 4659 55 69 04. 2 41 48 1 271 11 7 69 1 0  16 4635 /,, 1 27 70 12 27 4646 60 6 9 04. 6 42 02 1332 1 27 70 11 3 1  4643 65 69 05. 8 42 15 1362 1 27 70 1 0  12 4652 68 69 06. 2 4 2 2 3 1380 1 27 70 7 3 8 4659 N 0 -.:i Statian No. s 68 69 70 /,, ,,f, ,,f, ,,f, 75 80 85 90 t, 95 /,, 100 /,, /,, /,, 105 /,, 110 115 120 125 I Latitude 69° 06. 2's 69 06. 4 69 06. 9 69 12. 1 69 17. 3 69 22. 5 6 9 27. 7 69 32. 8 6 9 38. 1 69 43. 2 69 48. 5 69 53. 8 69 59. 0 70 04. 2 Longitude Elevation 42° 231E 1380m 42 26 1381 42 29 1388 42 32 1435 42 35 1473 42 38 1522 42 42 1560 42 46 1588 I 42 50 1630 42 53 1656 42 56 1696 43 01 1758 43 04 1845 43 07 1876 Date GMT I lm27d70� 9h24m 1 27 70 8 00 1 27 70 9 00 11 8 69 12 34 1 26 70 17 51 1 27 70 9 29 1 26 70 18 21 /,, 18 46 1 26 70 16 19 1 26 70 14 56 1 26 70 13 16 11 9 69 12 11 1 26 70 11 14 11 9 69 14 50 1 26 70 9 45 11 9 69 17 40 /,, 17 41 11 11 69 17 44 1 25 70 18 33 11 11 69 9 52 1 25 70 17 03 1 25 70 15 08 1 25 70 13 37 1 24 70 18 13 1 24 70 16 37 F D XlO r 4657 4661 4662 4654 4670 4666 4 7° 51'W 47 49 4679 4677 4681 4649 4681 4650 4702 4690 4660 4693 4754 4729 4756 4757 4733 4732 4754 I -66° 06' -66 00 - - --- - -- - -- -----··-H z XIO r XI01 1890 1898 -4266 -4262 .... ·-- -------N S :: �0onNo. � �  :: �u�::ro3:g:�de I EI e� ::��r ��1t:d J � :T5 7�t � � ;� 0 ,r� D 1 24 70 I 15 21 I 4750 /,, /,, /,, 15 22 4 755 /,, /,, 15 23 4756 135 70 14. 6 43 06 1909 11 12 69 15 34 4743 /,, 1 24 70 12 35 4757 I /,, 1 24 70 13 28 49 ° l'lW -66° 10' 140 145 /,, 150 155 /,, 160 165 /,, 1 70 /,, /,, 175 180 185 190 70 19. 8 70 25. 0 70 30. 0 70 35. 0 70 40. 2 70 45. 3 70 50. 5 70 5a 8 70 5& 9 71 0� 0 71 0� 1 43 06 43 06 43 04 43 0 5 43 06 43 07 43 07 42 56 42 57 42 57 42 58 1934 1944 1971 1992 2008 2035 2034 2036 2075 2114 2180 �--- - --1 24 70 10 47 4742 11 13 69 10 34 4763 1 24 70 9 23 4757 1 23 70 21 03 4 769 1 24 70 7 54 4763 11 13 69 15 47 4648 1 23 70 19 23 4775 1 23 70 17 49 4780 11 14 69 10 23 4 787 1 23 70 16 07 4 786 1 22 70 20 30 4 791 1 23 70 13 32 49 26 -66 46 1 23 70 14 22 4788 11 16 69 13 33 4791 11 16 69 13 40 4801 11 16 69 16 28 4824 11 17 69 17 57 4810 H z x10' x10' 1922 -4351 1890 -4402 N 0 tO Station No. S 205 210 215 220 225 230 240 A 154 146 128 110 102 098 094 090 086 082 075 074 066 , 058 t Latitude 71° 24. 5' s 71 29. 6 71 34. 7 71 39. 7 71 44. 8 71 49. 9 72 00. 1 72 00. 8 71 58. 9 72 00. 9 71 59. 9 71 59. 3 71 59. 2 71 58. 2 71 58. 3 71 58. 2 71 57. 5 71 55. 3 71 56. 4 71 55. 6 71 55. 3 -" Longitude Elevation 43°01' E rn 2303 43 03 2332 43 04 2374 43 04 2410 43 05 2462 43 06 I 2506 43 09 2591 42 47 2561 42 34 2545 41 50 2533 41 12 2499 40 49 2477 140 35 2475 40 20 2457 40 08 2446 39 54 2450 39 41 2445 39 24 2412 39 21 2421 39 01 2423 38 30 2408 Date GMT F D I H z x1o r x1o r XlOr rn d y h 11 19 69 10 40 4814 11 19 69 14 10 4821 11 19 69 16 48 4840 11 20 6 9 9 53 4842 I 11 20 6 9 13 18 4844 11 20 69 I 16 03 4850 Ill 22 69 15 26 I 4857 11 23 69 16 52 49° 4 6'wl -67° 11' 1884 -4477 11 2 5 69 20 38 4851 11 28 69 16 18 4843 11 30 69 19 01 4842 12 2 69 19 36 4834 12 3 69 18 48 4823 112 4 69 14 39 4819 I 1 2 4 69 18 38 4804 12 6 69 20 42 4799 12 7 69 17 53 4812 12 10 69 15 11 4787 12 12 69 18 20 47 31 -66 39 I I 12 13 69 13 05 4776 12 13 69 20 48 4784 12 14 69 10 18 4779 12 14 69 19 12 4769 12 15 69 10 18 4762 � ..... 0 St at ion No. A 054 050 046 042 038 030 026 021 019 017 015 009 B 5 12 Yam ato B -1 Yam ato B -3 23 31 36 37 C 6 10 15 17 Latitude Longitude 71 ° 55. 7 's 38° 20' E 71 55. 5 38 02 71 54. 6 37 49 71 54. 8 37 34 71 54. 6 37 15 71 52. 8 37 00 71 56. 8 36 50 71 51. 3 36 39 71 51. 9 36 34 71 52. 6 36 27 71 51. 7 36 23 71 48. 9 36 20 71 46 36. 1 ° 71 44 35. 8 71 37 35. 6 71 36 35. 7 71 33 35. 5 71 27 35. 4 71 23 35. 4 71 22 35. 4 I I 71 19. 7 35° 59. 3' 71 1 7. 6 3 6 10. 5 71 15. 0 36 24. 4 71 13. 9 36 30. 0 - -- --Elevation Date GMT F D I H z x10' x10' XlO T m 12ml 5d 69Y 1i39m 2416 4765 2422 12 15 69 19 59 4761 2408 12 16 69 13 19 4762 2413 12 16 69 17 54 4765 2430 12 1 7 69 15 02 4749 2414 12 18 69 11 32 4726 2395 12 18 69 15 51 4718 2392 12 18 69 16 40 4726 2387 12 21 69 I 13 38 4730 2376 12 21 69 16 56 4718 2353 12 21 69 18 09 4714 2296 12 27 69 20 20 4711 2182 12 31 69 19 08 4721 1991 1 2 70 11 00 4698 1952 1 7 70 8 18 4707 2078 1 7 70 9 25 4695 1750 1 7 70 17 48 4684 1700 1 8 70 18 00 4677 1635 1 8 70 20 34 4662 1632 1 11 70 10 25 4658 1796 1 13 70 16 26 4693 1768 1 13 70 17 54 4689 44° 3� 1763 1 13 70 19 47 4682 1759 1 15 70 9 29 N .... .... Station No. C 37 ,1' 44 49 55 60 ,1' 65 70 75 80 ,1' ,1' 85 90 94 100 105 110 115 120 125 130 Latitude 11 ° o 1. g's 71 07. 6 71 07. 2 71 06. 9 71 06. 7 71 06. 4 71 06. 2 71 05. 9 71 05. 4 71 05. 8 71 05. 8 71 05. 9 71 06. 0 71 06. 1 71 06. 3 71 06. 4 71 06. 6 71 03. 6 71 00. 5 Longitude Elevation 31°21. 5E m 1805 37 49. 4 1807 38 05. 3 1792 38 24. 3 1757 38 40. 3 1729 38 56. 2 1737 39 12. 1 1747 39 28. 0 1749 39 43. 9 1767 I 4 o 01. o 179 4 40 1 7. 1 1802 40 31. 8 179 4 40 52. 4 1823 41 09. 5 1836 41 26. 6 1889 41 43. 6 1930 42 00. 7 1984 42 12. 3 1963 42 23. 8 1978 ' Date GNiT F D I H z XlO T XlOT XlOr m d y 1 16 70 12h25m 4731 1 17 70 9 03 4717 1 17 70 12 31 4712 1 1 7 70 15 07 4711 1 17 70 17 48 4714 I 1 17 70 19 55 4714 1 18 70 9 47 4707 1 18 70 11 07 4713 1 18 70 15 02 4722 1 18 70 17 40 4728 1 18 70 19 36 4732 1 19 70 13 28 4728 1 19 70 17 34 41° 03w -66° 291 1886 -4335 1 20 70 11 20 4728 1 20 70 13 46 4744 1 20 70 20 03 4746 1 21 70 10 39 4749 1 21 70 13 27 4755 1 21 70 15 23 4763 1 21 70 1 7 15 4760 1 21 70 19 27 4772 1 22 70 8 21 4769 1 22 70 10 26 4768 -- - - --- ----- - -- - - - ---- - -- ---- - - - - - -- - - --+ -- - --- - - - - ----- ---- - --- - -------- - - ---- - --- - - ---------- - --- ·· -- --·-. N) ...... N) I Station C 135 140 145 NQ Latitude Longitude Elevation ---1-70° 57. ls 0 , m 42 35. 4E 1998 70 54. 4 4 2 46. 9 2002 70 51. 3 4 2 58. 5 2031 --�- --- -���--·-�-�-- �� � Date GMT F D I H XlO T XlO T XlO T lm22d 70y 13h18rr I 4766 1 22 70 15 03 4779 1 22 70 17 12 4782 -�� t'V .... Table X-3. Data of geomagnetism in West Enderby Land, 1970 - 1971. Location and elevation of the magnetic station were referred to Shimizu et al. ( 1972). F: total force, D: declination, I: inclination, H: horizontal component and Z: vertical component of geomagnetism. Station No. Latitude Longitude Elevation Da te GMT F D I H z m m d y h m x1o r x1o r S 17 69° 01. 9' s 40° 04' E 583 11 03 70 11 22 4580 22 69 01. 7 40 18 743 11 03 70 12 57 4593 . 27 69 02. 5 40 32 893 11 03 70 14 31 4654 32 69 03. 6 40 46 994 11 04 70 06 35 4636 37 69 04. 8 40 59 10 74 11 04 70 08 28 4635 42 69 04. 6 41 13 1138 11 04 70 10 38 4658 47 69 04. 3 41 26 1184 11 04 70 12 16 4625 52 69 04. 1 41 40 1227 11 0 5 70 09 06 4648 57 69 03. 8 41 54 1276 11 08 70 07 40 4643 62 69 05. 2 42 07 13 41 11 0 8 70 11 06 4641 67 69 06. 0 42 21 1363 11 0 8 70 13 08 4655 70 69 06. 9 42 29 1388 11 09 70 06 33 4654 72 69 09. 0 42 30 1409 11 09 70 07 52 4657 77 69 14. 2 42 33 1451 11 0 9 70 IO 31 4662 82 69 19. 4 42 36 1489 11 09 70 12 57 4664 87 69 24. 6 42 40 1534 11 09 70 15 31 4683 92 69 29. 8 42 43 1568 11 IO 70 06 49 4680 97 69 34. 9 42 48 1605 11 10 70 09 05 4702 102 69 40. I 42 51 1636 11 IO 70 14 30 4758 112 69 50. 6 42 58 1736 11 11 70 08 19 4708 1 7 69 55. 9 43 03 1774 11 11 70 09 31 4723 122 70 01. I 43 06 1853 11 12 70 17 40 4715 48° 38'W -66° 33' -4325 150 70 30. 0 43 04 1971 01 16 71 15 26 4760 169 70 49. 4 43 07 2035 0 1 12 71 15 32 4778 Z 10 70 05. 8 43 14 1911 11 13 70 10 43 4738 x1o r N ...... .i::. -- -- - - - -- - - - - - ---- --- - - - - - - ------ - --- -- - - -- ----- - -- - - - - ----- · · · -- -.---------- ----- - ----- - -- - ------- - - ---Station No. Latitude Longitu de Elevation Da te Z 22 70° 11. 58 43° 241 E 1952 m 11m l 3d 70Y 30 70 15. 3 43 30 1997 11 13 70 35 70 17. 7 43 34 2012 11 13 70 41 70 20. 5 43 38 2018 11 14 70 51 70 23. 4 43 43 2020 11 14 70 70 70 27. 8 43 50 2059 11 14 70 80 70 32. 2 43 58 2091 11 14 70 90 70 36. 3 44 06 2111 11 14 70 100 70 40. 5 44 14 2138 11 14 70 Mizuho Camp 70 42. 1 44 18 2169 11 16 70 y 11 18 70 10 70 45. 6 44 30 2227 11 19 70 20 70 49. 2 44 44 2272 11 19 70 30 70 52. 7 44 57 2314 11 19 70 35 70 54. 2 45 05 2342 11 19 70 100 71 15. 9 46 32 2545 11 22 70 135 71 26. 8 47 22 2644 11 24 70 145 71 30. 0 47 36 2675 11 25 70 155 71 33. 1 47 50 2702 11 25 70 165 71 36. 2 48 04 2719 11 25 70 170 71 3 7. 4 48 12 2720 11 25 70 180 71 40. 5 48 26 2777 11 26 70 2 0 0 71 4 6. 2 4 8 5 6 2 81 9 11 2 6 7 0 210 71 41. 1 49 02 2807 11 29 70 190 71 43_ 4 48 41 2809 I 11 26 70 --- -�--- ----- - --- -- --- � - - - --- -- . GMT 14h 31m 16 13 17 32 09 36 11 01 13 46 16 34 10 17 13 16 13 50 13 35 09 21 12 08 14 13 17 22 14 54 18 32 08 48 16 20 12 20 15 17 08 41 10 27 14 28 10 00 ----- - ------ -F D x1or 4718 4732 4750 4764 4779 4771 4782 4789 4803 4805 49° 54W 4808 49 50 4811 4817 4822 4827 50 56 52 14 4893 52 46 4898 4910 4918 4936 53 31 4930 4943 4950 54 22 4957 - -�--I H z Xl07 x10' -66° 50' 1890 -4418 -66 49 1893 -4420 -67 05 1880 -4446 -67 08 -67 25 1879 -4518 -67 30 1890 -4560 -67 51 1866 -4584 N) -c.n Station No. Y225 235 245 255 265 270 280 290 300 305 315 335 345 360 370 380 390 400 405 415 425 435 440 450 460 Latitude 11 ° 33. 3's 71 28. 2 71 22. 9 71 1 7. 8 71 12. 5 71 10. 0 71 05. 2 71 00. 0 70 54. 9 70 52. 4 70 47. 3 70 36. 9 70 31. 6 70 24. 0 70 18. 8 70 13. 4 70 08. 2 70 02. 9 70 00. 3 69 55. l 69 49. 8 69 44. 5 69 41. 9 69 36. 7 69 31. 4 Longitude Elevation 49°09' E 2785m 49 14 2764 49 20 2746 49 26 2720 49 31 2679 49 34 2676 49 42 I 2666 49 48 2635 49 53 2629 49 56 2616 50 02 2601 50 13 2577 50 19 2555 50 28 2527 50 33 2503 50 36 2475 50 41 2433 50 44 2399 50 46 2388 50 50 2356 50 55 2335 50 59 2317 51 01 2306 51 05 2271 I 51 09 2219 Da te 11m29d 70y 11 29 70 11 30 70 11 30 70 11 30 70 11 30 70 12 01 70 12 01 70 12 01 70 12 01 70 12 02 70 12 02 70 12 03 70 12 03 70 12 04 70 12 06 70 12 06 70 12 06 70 12 06 70 12 07 70 12 07 70 12 07 70 12 07 70 12 08 70 12 08 70 GMT 13h 4om 16 36 09 16 11 44 14 07 1 7 19 09 07 11 44 13 53 16 00 09 32 14 57 09 24 13 02 12 53 09 39 12 05 14 05 16 50 09 20 11 54 13 46 15 22 08 50 11 21 F xior 4944 4936 4920 4916 4921 4935 4924 4931 4935 4927 4925 4921 4921 4909 4891 4871 4905 4919 4921 4912 4911 4920 4917 4898 4907 D I H z x10' x10' 54° 58W -67° 581 1852 -4574 I 54 46 -67 34 I 1867 -4521 53 43 I -68 oo 1843 -4563 N � 0) Longitu de [Elev�t ion S ta t i on No. I La t i tu de c-----� ----j--- -Y 470 475 500 510 530 535 545 555 Sandercock Nuna t aks W 07 1 3 19 22 26 29 33 40 55 230 245 255 270 280 290 69° 26, i's 69 23. 5 6 9 10. 6 6 9 05. 3 68 58. 2 68 55. 5 6 8 50. 3 68 45. 0 68 37. 0 68 45. 1 68 51. 2 68 58. 7 69 01. 5 69 05. 9 69 09. 4 69 16. 5 69 23. 4 69 41. 4 6 9 53. 7 6 9 59. 7 70 03. 6 70 09. 4 70 13. 3 70 1 7. 0 51014' E 220 51 16 218 51 26 212 51 30 51 48 51 49 51 53 51 57 52 06 51 36 51 13 50 51 50 39 50 22 50 14 49 53 49 28 48 10 47 34 4 7 16 47 04 46 46 46 34 46 23 210 211 210 2099 2086 2056 2051 1962 1943 1909 1881 1856 1851 1840 210 7 2254 2298 2316 2339 2344 2337 Date I2m08d70y 12 08 70 12 09 70 12 09 70 I 1 0 1 1 7 (\ 12 12 70 12 12 12 12 12 12 12 12 12 12 12 01 01 01 01 01 01 01 12 70 13 70 17 70 18 70 19 70 23 70 23 70 25 70 2 5 70 26 70 31 70 02 H 0 6 71 06 71 06 71 06 71 07 71 07 71 I GMT 13h15m 17 3b 11 58 14 22 1 t:: (\ A 09 30 11 14 15 21 17 32 16 48 1 7 20 14 17 19 16 14 43 20 23 20 22 1 3 16 19 35 0 6 4 7 11 10 13 26 17 18 08 24 09 59 ··--"-·-- -�- -'" --- �-F D I x1or 4876 ! 53°59'W1 -67° 07' 4863 4865 ,1 QC:7 4837 4834 4851 54 53 -67 33 4828 54 48 -67 24 4830 54 11 -67 18 4831 i 54 06 -67 14 4833 4822 4826 4819 53 06 -66 54 4822 53 1 7 -66 52 52 13 -67 02 52 17 -66 48 4811 4812 4805 4827 4817 4823 H z x1 or x 1or 1853 -4483 1856 -4458 1864 -4455 1869 -4455 1891 -4433 1894 -4434 N ..... -:i Station No. W300 310 320 335 345 355 365 X 8 14 Latitude 70°20. 61S 70 24. 3 70 28. 0 70 32. 0 70 34. 8 70 37. 2 70 39. 8 70 44. 0 70 46. 4 Longitude Elevation Da te - -- ----46°11' E 2322m O lm07d 71Y 45 59 2301 01 07 71 45 47 2291 01 07 71 45 24 2288 01 08 71 45 09 2265 01 08 71 44 54 2246 101 08 71 44 38 2221 01 08 71 43 49 2097 01 12 71 43 27 2069 01 12 71 GMT F XI()T 11h57 m 4818 13 24 4828 15 40 4813 08 53 4803 10 34 4801 12 11 4808 13 26 I 4797 11 04 4796 13 08 4781 D O I I 51 14W I I I I I I -66°55' H XlO r x101 1887 -4427 I 

X. Geomagnetic Survey in the Mizuho Plateau-West Enderby Land Area, East Antarctica, 1969-1971

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X. Geomagnetic Survey in the Mizuho Plateau-West Enderby Land Area, East Antarctica, 1969-1971

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