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

Sensitivity : D 1.07 min/mm H 2,2 Y/mm Z 5.0 Y/mm

Recording speed : 20 mm/hour Askania (Eschenhagen type)H variometer with visual recorder

Sensitivity : 3 Y/mm Recording speed : 20 mm/hour

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

H 24 Y/mm Z 21 Y/mm

Recording speed : 15 mm/hour Rapid-run instrument: Sensitivity : D 1.0 min/mm

H 5.4 Y/mm Z 6.8 Y/mm

Recording speed : 180 mm/hour

COHTRIBUTING OBSERVATORIES

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

M A W S 0 N

MAGNETIC K-IUPICES - JULY 1964

Range for lower limit of K=9 is 1500 gammas

Day K-•Indices K-Sum 1 3 2 1 2 1 0 2 3 14 2 1 0 0 0 0 1 1 1 04 3 3 3 4 3 3 3 6 6 31 4 5 4 5 3 3 1 2 5 28 5 5 2 2 2 1 1 3 6 22 6 5 3 3 2 2 1 2 4 22 7 3 5 3 4 3 2 6 7 33 8 3 6 5 4 4 3 7 6 38 9 5 5 6 4 4 4 7 5 40 10 5 4 5 4 3 3 2 2 28 11 6 4 2 3 4 2 4 4 29 12 3 3 4 3 3 2 3 4 25 13 5 4 2 3 3 2 2 5 26 14 2 2 2 2 0 0 0 2 10 15 2 2 1 1 1 0 1 1 09 16 1 3 2 1 1 1 1 4 14 17 5 3 4 2 3 5 4 4 30 18 6 5 4 5 4 4 5 4 37 19 3 5 5 4 3 3 3 7 33 20 5 4 4 4 3 2 4 4 30 21 4 3 2 3 1 2 4 5 24 22 3 4 5 4 4 5 5 6 36 23 4 3 3 3 3 1 5 4 26 24 2 2 1 2 2 1 1 5 16 25 4 3 2 3 3 1 2 4 22 26 4 3 2 1 2 1 1 1 15 27 3 1 0 0 1 0 3 4 12 28 4 2 0 0 1 0 1 3 11 29 2 2 3 2 5 3 6 3 26 30 5 5 5 4 4 3 7 6 39 31 4 4 4 4 2 2 5 5 30

PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days

1964 H D Z Y ° ' Y

July 18351 61 01.2W -48454

W I L K E S

MAGNETIC K-INDICES - JULY 1964

Range for lower limit of K=9 is 2500 gammas

Day K-Indices K-Sum 1 0 1 1 0 0 0 0 0 02 2 0 0 0 0 0 1 1 0 02 3 2 3 2 2 2 1 2 3 17 4 2 2 2 2 1 1 1 1 12 5 1 2 1 1 1 0 0 1 07 6 2 2 1 1 1 1 0 1 09 7 2 2 1 1 3 1 1 2 13 8 2 3 2 3 2 2 4 5 23 9 2 3 3 2 1 1 2 2 16 10 3 3 2 2 2 1 0 1 14 11 2 2 2 1 2 1 3 1 14 12 1 2 2 1 1 1 1 1 10 13 1 2 1 1 1 1 1 1 09 14 0 1 2 1 1 0 0 1 06 15 0 1 1 0 0 0 0 0 02 16 0 1 1 1 0 0 1 1 05 17 2 2 2 2 2 3 3 2 18 18 2 3 3 4 3 2 2 2 21 19 2 3 2 2 1 1 1 2 U 20 2 3 2 2 2 1 2 1 15 21 2 2 2 1 1 1 2 2 13 22 2 2 3 2 3 2 2 2 18 23 2 2 1 - - - - - 05 + 24 - 1 1 1 1 1 0 0 05 25 1 2 1 1 1 0 1 1 08 26 1 2 1 1 1 1 0 1 08 27 1 1 1 0 0 0 0 1 04 2-8 1 1 0 0 1 1 1 1 06 29 1 2 2 2 3 3 4 2 19 30 3 3 3 2 2 2 3 3 21 31 3 3 3 2 2 3 2 1 19

PfiELIMINARY MONTHLY MEAN VALUES Based on 10 selected q.uiet days

1964 H D Z y o < Y

July 9226 85 58.OW -64808

M A C Q U A R I E I S L A N D

MAGNETIC K-IMDICES - JULY 1964

Range for lower limit of K=9 is 1500 gammas

Day E-•Indices K-Sum 1 0 0 0 0 0 0 0 0 00 2 0 0 0 0 0 0 0 0 00 3 1 1 4 3 5 1 1 2 18 4 2 3 3 3 3 0 0 0 14 5 0 0 0 0 0 0 0 0 00 6 1 0 0 1 2 0 0 0 04 7 0 1 3 3 6 3 2 3 21 8 3 4 4 5 3 2 3 3 27 9 2 2 2 2 2 3 1 2 16 10 3 2 6 5 4 1 0 0 21 11 1 0 0 3 1 1 1 0 07 12 0 0 1 2 1 1 1 1 07 13 0 0 1 4 3 0 0 1 09 14 0 0 1 0 0 0 0 0 01 15 0 0 0 0 0 0 0 0 00 16 0 0 0 0 0 0 0 0 00 17 0 0 0 4 5 6 4 1 20 18 3 4 3 7 5 4 2 2 30 19 1 3 3 5 0 0 1 1 14 20 2 1 3 4 1 1 0 1 13 21 0 0 0 2 2 1 1 1 07 22 1 1 4 1 3 1 2 0 13 23 0 0 2 3 0 0 0 0 05 24 0 0 0 2 0 0 0 0 02 25 0 0 0 1 3 0 0 0 04 26 1 0 0 2 1 0 0 0 04 27 0 0 0 1 0 0 0 0 01 28 0 0 0 0 0 0 0 0 00 29 0 0 0 5 5 3 3 2 18 30 2 2 3 3 5 1 1 2 19 31 2 1 3 3 2 2 1 1 15

PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days

1964 H D Z y 0 , y

July 13175 26 16.5E -64289

T O O L A N G I

MAGHETIC K-IKDICES - JULY 1964

Range for lower limit of K=9 is 500 gammas

Day K-•Indices K-Sum 1 0 1 1 0 0 0 0 0 02 2 0 0 0 0 0 0 0 0 00 3 3 2 3 2 3 1 2 3 19 4 3 2 3 3 2 1 0 1 . 15 5 0 1 0 1 0 0 0 0 02 6 1 0 2 1 2 1 0 0 07 7 2 3 3 2 4 2 3 3 22 8 3 4 3 4 3 2 3 3 25 9 3 2 2 2 2 2 2 3 18 10 3 3 4 4 3 1 0 0 18 11 2 1 1 2 1 2 2 0 11 12 0 1 1 2 1 2 1 1 09 13 1 2 1 3 3 0 0 1 11 14 0 1 1 0 1 0 0 0 03 15 0 0 0 0 0 0 0 0 00 16 1 1 1 0 1 1 1 1 07 17 2 1 2 3 3 5 4 2 22 18 3 3 4 5 4 3 2 2 26 19 2 3 3 4 1 0 1 2 16 20 3 1 1 4 1 1 2 0 13 21 1 1 1 1 1 1 2 2 10 22 1 2 3 3 2 1 3 2 17 23 1 1 2 2 1 0 2 1 10 24 1 1 0 2 1 0 0 1 06 25 0 1 0 1 2 1 0 0 05 26 1 1 0 1 1 1 0 0 05 27 0 0 0 0 0 0 0 0 00 28 0 0 0 0 0 0 0 0 00 29 0 0 2 3 4 3 4 2 18 30 2 3 3 2 4 2 3 2 21 31 2 2 3 2 2 2 1 1 15

T O O L A N G I

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 -

G N A N G A R A

MAGNETIC K-INDICES - JULY 1964

Eange for lower limit of K=9 is 3i50 gammaa

Day K-•Indices K-Sum 1 0 1 1 1 0 0 0 1 04 2 1 0 1 1 1 1 0 2 07 3 3 3 2 2 4 1 3 4 22 4 2 3 3 2 2 1 1 0 14 5 1 2 2 3 0 1 1 2 12 6 2 1 1 1 2 1 1 2 11 7 2 2 2 2 4 3 3 3 21 8 3 3 3 4 2 2 4 3 24 9 2 2 2 2 2 2 4 3 19 10 3 3 4 3 3 2 1 0 19 11 1 1 1 1 1 2 2 1 10 12 0 1 1 1 0 2 1 1 07 13 1 2 0 2 3 1 0 1 10 14 0 1 1 0 0 0 1 0 03 15 0 0 1 1 0 0 0 0 02 16 1 1 1 0 1 2 1 2 09 17 2 1 1 2 3 5 4 2 20 18 3 3 2 5 4 4 3 2 26 19 2 3 4 4 1 0 2 3 19 20 2 2 2 3 1 1 3 1 15 21 1 1 1 1 2 2 1 10 22 2 3 1 2 4 4 1 18 23 1 1 2 1 0 3 1 10 24 0 1 2 0 0 0 0 04 25 1 0 1 1 1 1 1 07 26 1 1 1 1 1 0 0 06 27 0 0 0 1 0 0 0 02 28 1 0 0 0 0 0 1 03 29 1 1 3 4 2 4 2 18 30 2 3 3 2 4 1 4 2 21 31 2 2 2 2 3 2 2 1 16

10

G N A U G A R A

PBELIMIMAEY MOUTHLY MEAH VALUES Based on 5 selected quiet days

1964 H D Z Y ° • y

July 23917 2 51.5W -53506

PBINCIPAli MAGMETIC STOBMS - JULY 1964 NIL

SUDDEN COMMEMCEMENTS AMD OTHER PHENOMENA - JULY 1964 Sense of Movement

Day Time Type H D Z h m

02 23 25 ssc C + 05 00 45 pc4 B 17 17 12 tps A + + + 19 09 55 b A - - -

20 05 20 pc4 B 20 18 52 bp B + + + 22 17 35 bp B + + + 23 19 30 bps B - + 26 00 .. po4 B 28 14 45 pi2 B 29 19 32 bps A + + + 30 18 37 bps B + + + 30 22 .. pc4 B

11

P O R T M O H E S B Y

MASNETIC K-INDICES - JULY 1964

Range for lower limit of K=9 is 300 gammas

Day E-Indices K-Sum 1 2 2 1 2 1 1 1 0 10 2 1 0 0 1 1 2 2 3 10 3 3 4 3 2 2 2 3 3 22 4 3 3 3 2 2 1 1 0 15 5 1 1 0 2 0 1 1 1 07 6 1 0 1 2 2 1 1 2 10 7 1 + 2 1 2 3 3 2 3 17 + 8 3 4 3 4 2 3 3 3 25 9 3 3 2 2 2 3 2 3 20 10 3 3 4 4 3 2 1 1 21 11 2 1 1 2 2 2 2 1 13 12 1 1 2 2 1 2 2 2 13 13 2 1 2 2 3 1 1 2 14 14 2 2 2 1 1 1 1 1 11 15 2 2 2 1 0 0 0 1 08 16 2 1 1 1 - - - - —

17 3 2 2 2 3 4 3 2 21 18 4 3 3 4 3 3 1 2 23 19 2 4 4 4 1 1 2 3 21 20 3 2 3 3 1 1 1 0 14 21 1 1 1 1 1 1 1 2 09 22 2 2 2 2 2 2 2 2 16 23 2 1 2 1 2 0 1 1 10 24 1 1 1 2 1 0 0 1 07 25 2 2 2 2 2 2 0 2 U 26 2 2 1 1 2 2 0 1 11 27 2 1 0 1 1 1 1 1 08 28 2 2 0 0 0 0 0 1 05 29 2 1 3 4 4 3 4 2 23 30 3 3 3 3 3 1 2 1 19 31 2 2 3 2 2 2 1 2 16

12

P O R T M O R E S B Y

PRELIMIMARY MOMTHLY MEM VALUES Based on 10 selected quiet days

1964 H D Z Y ° ' Y

July 36358 06 07.4E -22968

PRINCIPAL MAGNETIC STORMS - JULY 1964 NIL

SUDDEN COMMENCEMENTS AND OTHER PHENOMENA - JULY 1964 Sense of Movement

Day Time Type H D Z h m

02 16 25.2 ssc C + 0 + 02 23 23.6 ssc B + + +

13