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C O M M O N W E A L T H O F A U S T R A L I A

D E P A R T M E N T O F N A T I O N A L D E V E L O P M E N T

B U R E A U O F M I N E R A L R E S O U R C E S ,

G E O L O G Y A N D G E O P H Y S I C S

GEOPHYSICAL OBSERVATORY REPORT

VOL. 9 NO 7

JULY

1961

•""•"nJ under the authority of Senator The Hon. IV. H. Spooner,

Minister for National Deveiopment

- J J

y.. u J,

copy 2

DEPARTMENT OF NATIONAL DEVELOPMENT

Minister-SENATOR The HON. W . H. SPOONER

Secretary-H. G. RAGGATT

BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS

J. M. RAYNER - Director

This Report was prepared in the Geophysical Branch :

R. F. THYER - Chief Geophysicist

J. C. DOOLEY - Supervising Geophysicist

C O N T E N T S

Contrituting Observatories Page

2

Geomagnetic Data: Mawson 5 Wilkes 6 Macguarie Island 7 Toolangi 8 Gnangara 10 Port Moresby , 12

Unless otherwise stated all times are given in Greenwich 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

Chief Geophysicist, Bureau of Mineral Resources, Geology & Geophysics, 203 Collins Street, MELBOURNE, C.I,, A U S T R A L I A .

CONTRIBUTING OBSERVATOBIES

GNAHaASA MAGNETIC OBSEBVATORY P.M. McGregor. Observer in Charge

Geographic Latitude 31°i4-7'S Geomagnetic Latitude -43.2°

Lorigitude Longitude

115°57'E 185.8°

Instriiments G.I.W. field magnetometer and theodolite earthinductor No.7 Askania magnetometer No.508810 Askania earthinductor No. "S111079 La Cour QHMs No.291, 292, 293 La Cour BMZ No. 120 Eschenhagen D, H & Z recording variometers

Sensitivity : 1. 07 min/mm 2.2 Y/mm 5.0 Y/inm

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

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

La Cour rapid run variometers are "being installed

MACQUARIE ISLAND MAGNETIC OBSERVATORY P.J. Milne Ohserver in Charge

Geographic Latitude 54°30'S Geomagnetic Latitude -60.7°

Longitude Longitude

158°57'E 2i .3,0°

Instruments La Cour QHMs Nos.177, 178, 179 La Cour BMZ No.64 Kew pattern magnetometer No.158 La Cour D, H <4 Z recording variometers

Normal sensitivity

Recording speed Low sensitivity

Recording speed

D 0.9 min/mm H 12.5 Y/mm Z 1i+. 1 Y/mm 15 mm/hour D 2.3 min/mm H 63 Y/mm Z 59 Y/mm 15 mm/hour

CORTRIBUTIHG O^ESVATORIES

MAWSOK MAGNETIC OBSERVATORY R.J. Hollingsworth. Observer in Charge

Geographic Latitude 67°36'S Geomagnetic Latitude -73.2°

Lor^itude Longitude

62°53'E 103.1°

Instruments La Cour QHMs Nos.300, 301, 302 La Cour BMZ No.62 La Co\ir D, H & Z recording variometers

Normal sensitivity

Recording speed Low sensitivity

Recording speed : Bar fluxmeter magnetograph H, D, Z components

Recording speed :

D 0.8 min/mm H 9-9 Y/mm Z 10.3 Y/mm 15 mm/hour B 2.k min/mm H 52 Y/mtn Z 51 Y/ram 15 mm/hour 5 ram/minute

PORT MORESBY MAGMETIC OBSERVATORY J.A. BrooKs. Observer in Charge

Geographic Latitude 9°2U'S Geomagnetic Latitude -18.7°

Longitude Longitude

147°09'E 218.0°

Instruments La Cour QHMs Nos.187, 188, 189 La Cour BMZ No.68 Askania declinometer Ho.580333 Askania earthinductor No.5111081 C.I.W. field magnetometer and portable earthinductor No.18 La Coiir D,' H & Z recording variometers Standard instrument : Sensitivity

Rapid-run instrument: Recording speed Sensitivity

Recording speed

D 0.9 min/mm H 5.6 Y/mm Z 7.2 Y/mm 15 mm/hour D 0,6 miry'mm H 1.8 Y/mm Z 3.0 Y/mm 180 mm/hour

CONTRIBUTING OBSEBVATQBIES

TOOLANGI MAGNETIC OBSEKVATORY C.A. van der Waal. Observer in Charge

Geographic Latitude 37°32'S Xongitude 1ij.5°28'E Geomagnetic Latitude +.6.7° Longitude 220.8°

Instruments Ruska magnetometer No. 1+813 Schulze earthinductor Ko.i<.9 La Cour QMHs Nos.288, 289, 290 La Cour BMZ Ho.119 La Cour D, H & Z'recording variometers

Sensitivity : D 1.l6 miiVmm H i+.6 Y/irnn Z U.'-). Y/mm

Recording speed : 15 nm/hour

WILKES MAGNETIC OBSERVATORY W.M. Burch. Observer in Charge

Geographic Latitude 66°15'S Longitude 110°35'E Geomagnetic Latitude -77.2° Longitude 179-2°

Instruments C.I.W. field magnetometer and theodolite earthinductor No.28 La Cour QHMs Nos.i4.92, 1+93, k9k La Cour BMZ No.236 Ruska D, H & Z recording variometers Standard instrument : Sensitivity : D 10.6 min/imn

H 21+ r/mm Z 21+ Y/mm

Recording sijeed : 20 mm/hour Rapid-run instrument: Sensitivity : D 1.3 miry'mm

H 5.3 Y/mm Z 6,3 Y/mm

Recording speed : 21+0 mm/hour

M A W S O N

MAGNETIC K-INDIOES - JULY 196-t

Range for lower limit of K=9 is-1500 gammas

Day K-•Indices K-Sua

5 5 k- 2 - :

2 3 3 5 ' 3 3 5 5 3 6 3: U it- 2 s 31

1+ 3 3 2 5 2 it: 7 30 5 7 7 6 5 U 3 6 6 i44 6 k 5 U U U 6' it- 3 3it 7r 6 5 5 3 3 it 3 33 8 5 5 k 3 2 it 6 33 9 U 5 5 k 3 3 1 : 1 26

10 5 6 5 5 ':- k it 2 6 37' 11 5 5 3 3 2 3 it 5 ^ 30' 12- 3 U 3 2 2 3 3c 1 2h 13 3 k 2 7 7 6 7 7- it3:

6 5: 7 6 5 it- 8 1 ' it8' IB::; 5 6 5 5 : U 3' 7 6- i it1 16 6 6 5 3 3 it 6 5 38 17 • 5 5 U 2 5 7 36 I8r 5 7 7 5 5 7. 7- 7 56: 19 6 6 3 2 2 2 3:, it:i ' 28' 20 3 5 6 3 2 3 6,: 6 c' 3I4: 21 7 7 6 5 k 3 6c 5c it3 22; it 5 5 k 3; 1 c 5 c 31 23 ij. 2 3 5 5 it: 7 - 34 2h 6 5 U 5 3 2 it: 5 3it 25 5 5 k k 3 2 3 ; 30 26. 6 6: k 5 3 2 5 6 35 21- 5 3 5 6 5 5 7 7- it3 28 ij. 5: 5 U 3 3 6. 3. 33 29: 3 5 U 3' 3 2 it 5: : 29. 30 U k 5 3i 2 3. 6 it 31 31 3 1 . 3: 1 U 2 5 5 2H\

PEELIMIHARY.-vEglSrEHIiY. MEAN .¥ALUES . Based on ;tQ selected q.ulet days s H B Z

' Y ° ' Y July ; - - .18 30i+ 60 - W l O

W I L K E S

MAGMETIC K-IMDICES - JULY i961

Range for lower limit of K=9 is 2500 gammas

Day K-•Indices K-Sum 1 2 2 2 1 1 1 1 0 10 2 1 2 2 2 2 u 3 2 18 3 2 2 2 3 2 3 1 1 16 k 1 2 2 1 1 1 1 3 12 5 il- 3 3 2 3 2 1 2 20 6 3 3 3 1 2 6 4 2 24 7 3 3 3 2 2 2 4 1 20 8 2 3 3 1 2 2 4 2 19 9 3 3 3 2 1 3 1 1 17 10 2 3 1 2 3 2 1 1 15 11 3 2 3 2 1 1 2 1 15 12 3 3 2 2 1 1 1 2 15 13 3 2 3 6 7 6 6 5 38 14 5 5 5 5 k 4 4 36 15 3 k 2 3 3 2 4 4 25 16 3 3 M 2 3 2 5 2 24 17 3 3 3 3 3 2 4 5 26 18 k k 3 4 4 3 30 19 k k 3 3 2 2 2 3 23 20 k 5 5 3 2 3 3 4 29 21 3 3 3 3 2 2 3 2 21 22 3 2 3 3 3 1 0 19 23 3 2 3 2 3 3 2 3 21 2U 3 2 3 2 1 1 1 3 16 25 3 3 2 3 2 1 1 2 17 26 2 3 3 3 3 1 3 4 22 27 k if 5 k 4 5 6 36 28 k 3 2 2 2 3 5 3 24 29 3 3 2 2 2 1 1 1 15 30 3 3 3 2 1 1 2 2 17 31 3 2 3 2 0 0 3 2 15

PRELIMINARY MOMTHLY MEAN VALUES Based on 10 selected q.uiet days

1961 H D July

H Y 9 229

Z O f y

m 3 1 . - 6 k 9 6 k

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

MAGMETIC K-IMDICES - JKLY 1961

Range for lower limit of K=9 is 1500 gammas

Day K--Indices K-Sum 1 1 3 6 3 1 0 0 18 2 0 1 3 1 0 3 2 1 11 3 1 1 3 6 5 5 1 1 23

1 0 1 3 1 1 0 3 10 5 5 it 5 6 6 6 3 3 38 6 2 2 2 4 4 5 2 2 23 7 3 3 k 4 5 3 2 0 24 8 1 2 5 3 4 2 1 1 19 9 1 2 2 1 3 0 0 13 10 1 2 6 5 5 5 0 1 25 11 1 2 1 1 0 0 0 0 05 12 1 1 5 6 0 0 0 0 13 13 0 0 2 5 8 7 8 5 35

3 6 7 7 8 6 4 45 15 U 6 5 5 5 3 5 5 38 16 5 3 2 3 5 4 4 2 28 17 2 3 1 6 6 3 5 4 30 18 h 5 5 7 8 7 7 5 48 19 h 5 2 0 0 1 1 0 13 20 1 3 4 2 0 0 2 3 15 21 3 5 7 5 7 7 4 2 40 22 2 3 5 5 5 4 0 0 24 23 1 0 2 4 5 6 4 2 24 2h 2 h 6 5 3 1 1 26 25 3 h 4 4 4 2 1 1 23 26 3 2 1 3 5 0 3 3 20 27 3 3 8 9 6 5 6 6 46 28 ij. 3 3 3 2 4 3 4 26 29 1 2 2 2 1 1 0 1 10 30 1 1 3 3 1 2 2 1 14 31 0 1 0 4 4 0 3 1 13

PRELXMIHABY MOMTHLY MEAN VALUES Based on 10 selected quiet days

1961 H D Z Y o f y July 13 2U3 25 47.0E -64395

T 0 0 L A H G I

MAGi^TIC K-IHbiCES - "^Y 1961

Range for lower limit of K=9 is 500 gammas

Day K-•Indices K-Sum 1' 2 2 3 2 1' 1 1 . 16 2 1 2 3 1 1 3 3 2 16 3 1 2 3 U' 3 2 2 21 U 2 1 2 2 1 2 1 15 5 U 3 k- 5 5 3 2 3 29 6 1 3 2 3 2 h 2 1- 18 7 3 2 u 3 3 2: 2 1 20 8 1 3 3 3 3 1 2 1 17 9 2 2 3 2 1 2 1 0 13

10 1 3 k 3 3 1 2 21 11 2 2 1 1 1 1 0 1 09 1-2 1 2 3 3 0 1 1 1 12 13 1 1 2 5 6 5 5 29

3 3; 5: 6 6 5 U 3 35 15' 3 3 2 3 3 2 k U 2k 16 3 3 2 2 3 3 3 2 21 17 2 2 2 U 3 2 23 18 u 5 k 5 7 5 6 h 1+0 19 U 1 0 0 0 1 1 11 20 1 3 3 1 2 2 3 19 21 k 3 5 3 3 k 2 28 22 2 2 i4. 3 2 3 0 1 17 23 1 1 2 3 3 k 2 2 ia 2h 3 3 3 U 3 2 1 . 1 20 25 3 3 3 3 2 2 1 1 . 18 26 2 3 1 3 3 1 3- u 20 27 h 5 7 5 U 6 39 28.! 3 3 3- 3 2 2 3 3. 22 29 1 2 2 2 1 1 1 11. • 30- 2 2 3 3 1 0 2 1 31 1 2 1 2 3 0 3 1 13

T O O L A H a i

PRELIMINARY MbHTHLY MEAM VALUES

Based on 10 selected, quiet, days

1961 H D Y ° '

July 22 625 10 20.1E

Z Y

-56407

PRIHCIPAL MAGMETIO STORMS - JULY 1961

sudden max.activity storm time commencements act- C to Ranges

late begin end type amplitudes • .iv-- 3-hr D H z ity day per. K D H Z

h m d h J Y Y ' Y Y

0 4 2 0 . . 0 5 2 4 ... • • • • • • m 5 . 5 1 9 1 2 8 4 0 1 3 1 1 1 5 1 5 1 5 ssc - 3 + 1 1 + 0 ms 1 3 : 5 6 2 7 2 7 6 1 0 0

1 4 U - . 5 6 6 6 1 7 1 8 2 7 1 9 0 9 ssc + 2 + 0 ms 1 8 5 7 4 6 1 7 8 6 6

2 6 1 9 5 1 2 8 1 2 ssc* + 6 » + 3 1 +4. ms 2 7 7 6 4 2 8 6 1 3 6

SUDBEN COMMEHGEMEMTS AMI OTHER PHENOMKKA - JULY 1961

Day

01 10

17 20 2h 26

Time h m 11 0/j.

07 35 11 15 13 13 18 27 22 29 10 01 19 51

Type bps bp BSC Si SSO si

ssc"

A B A A A A A A

Sense of Movement

H D : Z

/- + + 0 0

Remarks

10

G M A N S A R A

MAGMETIC K-INDICES - JULY 1961

Range for lower limit of K=9 is 350 gammas

Day K-Indices K-S\im 1 - 2 2 2 3 2 1 0 1 13 2 1 2 3 2 1 i 3 2 18 3 2 2 3 1+ 3 3 2 1 20 U 2 1 2 2 2 2 1 h 16 5 5 3 it. 3 5 - 3 2 2 27 6 1 2 2 2 2 U 2 1 16 7 2 2 3 3 k 3 3 1 21 8 1 2 2 3 2 2 2 1 15 9 1 2 3 2 1 3 0 0 12 10 1 3 3 3 3 2 1 1 17 11 1 2 1 1 1 1 0 1 08 12 1 2 3 2 0 0 1 1 10 13 0 0 1 5 6 5 6 5 28 14 U 3 5 6 7 6 3 38 15 3 3 2 3 i 2 3 5 25 16 2 2 3 2 3 2 22 17 2 3 2 it. U 2 5 if 26 18 u 6 5 5 7 i+ 5 5 in 19 5 h 1 0 0 1 0 0 11 20 1 2 3 2 1 1 3 3 16 21 5 h 5 2 2 i+ it 2 28 22 2 3 3 3 3 1 0 0 15 23 1 1 2 3 3 5 3 2 20 2U 1 3 2 U 3 1 2 1 25 2 2 3 2 2 2 1 (1) (15) 26 3 3 1 2 3 1 if if 21 27 k 3 7 7 5 R 6 in 28 3 2 2 3 1 2 k 2 19 29 1 3 2 1 2 1 1 2 13 30 2 2 2 2 1 1 3 1 lif 31 1 1 1 2 2 0 3 2 12

11

Q N A M G A R A

PRELIMINABY MOMTHLY MEAN VALUES

Based on 5 selected quiet days

1961 H D Y ° '

July 2 3 93U -2 53.3W

Z Y

-53U-90

PRINCIPAL MAGKETIC STORMS - JUIY 1961

date storm time

sudden commencements act-

iv-ity

max. activity 0 to 9 Range s

date tegln end type amplitudes D H Z

act-iv-ity

13-hr davl per. K D H Z

13 17 26

h m 1115 19.. 1951

<1 h 1i4.21 ssc* 1905 2811 ssc +9*

Y +13 -26'' 14 5

.. ms 18 5 + 3 2 +i+0* ms 27 3,it

Z maximum off record 0930-09U5 on 27th.

29 38 46

Y Y 251+ 18k tkl 242 30k 311

SUDDEN COMMENCEMENTS AND OTHER PHENOMENA - JULY 1961

Sense of Movement

Daz Time Type, H D Z Daz h m

10 16 03 bps B + + + 11 16 i+3 Pt ^ B 13 11 15 ssc* A + -K -K 18 11 U5 "b A + - -20 02 1+9 ssc* B 26 19 51 ssc* A + +«

Remarks

12

P 0 R T M 0 R E S B Y

MAGiqETIC K-INDICES - JULY 1961

Range for lower limit of K=9 is 300 gammas

Day K-Indices 1 3 3 3 3 Q Q Q Q 2 Q 3 3 Q Q Q 3 Q 3 Q 3 3 k 3 3 Q 3 i+ 3 3 3 3 3 3 Q 6 5 3 U 5 5 3 Q 3 6 3 3 3 3 3 3 Q Q 7 3 3 3 3 3 Q Q Q 8 3 3 3 3 3 Q Q 3 9 3 3 3 Q Q Q Q Q

10 3 3 U h 3 3 Q Q 11 3 3 Q Q Q Q Q Q 12 Q Q 3 3 Q Q Q Q 13 Q Q Q 6 7 5 k 3

k 3 6 6 6 k k 3 15 3 3 Q 3 Q 5 k 16 U h 3 Q 3 Q 3 3 17 3 3 3 3 3 Q k k 18 6 5 6 5 U k 19 Q 3 Q Q Q Q Q Q 20 3 h 3 Q Q 5 21 5 k k 3 3 3 3 22 3 3 k h 3 Q Q 3 23 Q Q 3 3 k k 3 Q 2k Q 3 3 h 3 Q Q 3 25 k 3 3 k Q Q Q Q 26 3 3 Q Q Q Q 5 21 5 7 7 6 5 k 5 28 3 3 3 k 3 3 3 3 29 Q Q 3 Q, Q Q Q Q 30 3 3 3 Q Q Q 3 Q 31 3 3 3 Q Q Q 3 3

13

P O R T M O R E S B Y

PBINCIPAL MASNETIC STORMS - JULY 196-1

sudden max. activity storm time commencements act- 0 to 9 Ranges

iate begin end type amplitudes iv- 3-hr D H Z ity day per. K D H Z

h m a h 1 Y Y r r T 13 11(05) 15(00) ms 13 5 7 6 300 144 17 1825 1904 sc 1 15 16 m 18 2,5 6 10 131 49 20 0248 22(10) sc«? 6 6 m 20 8 5 6 15U 58

26 1950 28(10) sc* 1 1/2* 33 29 ms fill 27 3,i+ 7 12 393 135

SUDDEH COMMEMOEMEMTS AITO OTHER PHENOMENA - JULY 1961

Sense of Movement

Day Time Type H D z h m

01 11 04 bp C + _ + 01 16 36 pt C 02 15 52 pt 0 02 16 54 pt C 03 11 15 pt B 05 00(47) bp C + + 07 13 31 bp 0 + •

08 12 44 bp C + 0 + 09 16 19 bp 0 + ( + ) + 10 07(34) bp C + + 10 11 40 bp C + 1 + 10 16 13 pt B 11 16 41 pt C 12 08 45 bp B + - + 13 09 44 pt 0 13 11 11 si B + + 13 11 51 si B + + 14 10 45 bps A + + 14 13 00 bps A + + 15 13 46 bp C + • + 16 00 52 bp B + (-) + 16 13 10 bps B + 0 + 16 17 39 pt B 17 18 25 ssc B + + + 20 02 48 ssc^ B + + 20 22 28 si B - _ -21 07 36 b A + - ? + 22 14 35 bp B + 0 + 24 09 56 bp B + 0 + 25 15 14 pt 0 26 19 50 ssc* A + +H +

Remarks