COMMONWEALTH OF AUSTRALIA PARTMENT OF NATIONAL DEVELOPMENT X. BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS GEOPHYSICAL OBSERVATORY REPORT VOL. 12 NO 7 JULY 1964 BMR S550 .389.5 AUS. S copy 2 Issued under the authority of the Hon. D.E. Fair^ Minister for National Deveiopment
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VOL. 12 NO 7 JULY 1964 · Unless otherwis statee d al l times are given in Greenwicli Mean Time The terminology used in this report is that accepted by international convention Shoul.
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COMMONWEALTH O F AUSTRALIA
PARTMENT OF NATIONAL DEVELOPMENT
X . BUREAU O F MINERAL RESOURCES,
GEOLOGY AND GEOPHYSICS
GEOPHYSICAL OBSERVATORY REPORT
VOL. 12 NO 7
JULY
1964
BMR S 5 5 0 . 3 8 9 . 5 AUS. S copy 2
Issued under the authority of the Hon. D.E. Fair^
Minister for National Deveiopment
DEPARTMENT OF NATIONAL DEVELOPMENT
Minister - Hon. D.E. Fairbairn, D.F.C, M.P.
Secretary - Sir HAROLD RAGGATT, C.B.E.
BUREAU OF MINERAL RESOURCES,
GEOLOGY AND GEOPHYSICS
J.M. RAYNER-Director
This Report was prepared in the Geophysical Branch;
L.S. PRIOR-Assistant Director
W.D. Parkinson - Supervising Geophysicist
C O H T E N T S
Page Contributing Observatories 2
Geomagnetic Data: Mawson 5 Wilkes 6 Macquarie Island 7 Toolangi 8 Gnangara 10 Port Moresby 12
Unless otherwise stated all times are given in Greenwicli Mean Time
The terminology used in this report is that accepted by international convention. Should further information be required, explanation can be obtained by applying to:-
Assistant Director (Geophysics), Bureau of Mineral Resources, Geology and Geophysics, 203 Collins Street, MELBOUEUE, C.1., A U S T R A L I A.
COHTEIBUTCTG 0BSER7AT0RIES
GNAM&ARA MAGNETIC OBSERVATORY P.M. McGregor, Observer in Charge
Geographic latitude 31°47'S longitude 115°57'E Geomagnetic latitude -43.2° Longitude 185.8°
Instruments Askania magnetometer No.508810 Askania earthinductor No.5111079 La Cour QHMs No.291, 292, 293 La Cour BMZ No.120 Eschenhagen D, H & Z recording variometers
MACQUARIE ISLAND MAGNETIC OBSERVATORY G.D. Lodwick, Observer in Charge
Geographic Latitude 54°30'S Longitude 158°57'E Geomagnetic Latitude -60.7° Longitude 243.0°
Instruments La Cour QHMs Nos.177, 178, 179 La Cour BMZ No.64 Kew pattern magnetometer No.158 La Cour D, H & Z recording variometers Standard instrument : Sensitivity : D 2.3 min/mm
MAWSON MAGNETIC OBSERVATORY R.J.S. Cooke, Observer in Charge
aeographic Latitude 67°36'S Geomagnetic latitude -73.2°
Longitude Longitude
62''53'E 103.1"
Instruments La Cour QHMs Nos.300, 301, 302 La Cour BMZ No.62 La Cour D, H & Z recording variometers
Normal sensitivity
Recording speed Low sensitivity
Recording speed Bar fluxmeter D magnetograph
Recording speed
D 0.9 mirymm H 9.4 y/rm Z 10.0 Y/mm 15 mm/hour D 2 .4 min/mm H 51 Y/mm Z 50 Y/mm 15 mm/hour 5 mm/minute
PORT MORESBY MAGNETIC OBSERVATORY J.A. Brooks, Observer in Charge
Geographic Latitude 9°24'S Geomagnetic Latitude -18.7°
Longitude Longitude
147°09'E 2 1 8 . 0 °
Instruments La Cour QHMs Nos.187, 188, 189 La Cour BMZ No.68 Askanla declinometer No.580333 Askania earthinductor No.5111081 La Cour D, H & Z recording variometers Standard instrument : Sensitivity
Recording speed Rapid-run Instrument: Sensitivity
Recording speed
D 0.4 min/mm H 2.9 Y/mm Z 3•1 Y/mm 15 mm/hour D 0.05 min/mm H 1.2 y/mm Z 0.3 Y/mm 180 mm/hour
CONTRIBUTING OBSEHyATORIES
TOOLARSI MAGNETIC OBSERVATORY C.A. van der Waal. Observer in Charge
Geographic Latitude 37°32'S Geomagnetic Latitude -46.7°
Longitude Longitude
145°28'E 220.8°
Instruments Ruska magnetometer No.4813 Schulze earthinductor No.49 La Cour QHMs Nos.288, 289, 290 La Cour BMZ No.119 La Cour D, H & Z recording variometers
Sensitivity-
Recording speed
D 1.16 min/mm H 4.6 Y/mm Z 4.4 y/mm 15 mm/hour
WILKES MAGNETIC OBSERVATORY G.R. Small, Observer in Charge
Geographic Latitude 66°15'S Geomagnetic Latitude -11.2°
Longitude Longitude
110°31'E 179.2°
Instruments C.I.W. field magnetometer and theodolite earthinductor No.28 La Cour QHMs Nos.492, 493, 494 La Cour BMZ No.236 Ruska D, H & Z recording variometers Standard instrument ; Sensitivity-
Recording speed Rapid-run instrument: Sensitivity
Recording speed
D 10.6 min/mm H 24 Y/mm Z 24 Y/mm 20 mm/hour D 1.3 min/mm H 5.3 Y/mm Z 6.3 Y/mm 240 mm/hour
PRELIMINARY MONTHLY MEM VALUES Based on 10 selected quiet days
1964 H D Y 0 , July 22566 10 29.5E
Z y
-56380
PRIHCIPAL MAGMETIC STORMS - JULY I964
sudden max .activity storm time commencements act- 0 to 3 Ranges
date begin end type amplitudes iv- 3-hr D E Z ity day per. K D H Z
17 h m 11..
d h 1912 17
18 6 5 22.7 63 25
SUDDEN COMMECTCEMEIirTS AJiTD OTHER PHEHOMEMA - JUL? 1964 Sense of Movement
Day Time Type, H D Z h m
01 02 50 Pi2 B 02 23 24 ssc* C + * +
07 12 50 hp B + - + 08 11 01 bp A + - + 08 12 01 pi2 A 09 07 40 pi2 B 09 16 42 pi2 B 10 08 20 bp B + - + 11 15 50 pi2 B 12 15 13 bp C + 14 13 33 pl2 B 18 10 59 pi2 A 18 11 15 bp B - + 19 09 55 bp B - - -
20 08 56 bp B -
22 17 39 bp B + 24 10 17 pi2 B 27 11 25 pi2 B 28 16 02 pi2 B 29 14 04 bp B + - + 29 19 35 bp B + + + 30 11 45 bp B -