COMMONWEALTH OF AUSTRALIA DEPARTMENT OF NATIONAL DEVELOPMENT BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS -"T^EDPHYSTCM: OBSERVATORY REPORT

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1 itvor COMMONWEALTH OF AUSTRALIA DEPARTMENT OF NATIONAL DEVELOPMENT UREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS '-'iisati OF lyil -"T^EDPHYSTCM: OSERVATORY REPORT VOL 12 NO- 9 SEPTEMER 1964 Issued under the authority of the Hon, D.E. Fairbairn, Minister for National Development MR S5S AUS. S copy 2

2 DEPARTMENT OF NATIONAL DEVELOPMENT Minister - Hon. D.E. Fairbairn, D.F.C, M.P. Secretary - Sir HAROLD RAGGATT, C..E. UREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS J.M. RAYNER-Director This Report was prepared in the Geophysical ranch; L.S. PRIOR - Assistant Director W.D. Parkinson - Supervising Geophysicist

3 C O N T E N T S Page Contributing Observatories Geomagnetic Datas Mawson 5 Wilkes 6 Macquarie Island Toolangi 7 8 Gnangara 10 Port Moresby 12 2 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:- Assistant Director (Geophysics), ureau of Mineral Resources, Geology and Geophysics, 203 Collins Street, JMELODEE, C.I., ADS T A L I A.

4 COHTEIUTIMG OSERVATORIES WMQA.M. MAGITETIC OSERVATORY P.M. McGregor. Observer in Charge Geographic Latitude 31''47'S Geomagnetic Latitude 'E Instruments Askania magnetometer Ho La Cour QHMs No.291, 292, 293 La Cour MZ No.120 Eschenhagen D, H & Z recording variometers Sensitivity : D 1.07 min/mm H 2.2 Y/mm Z 5.0 Y/mm 20 mm/hour Askania (Eschenhagen type)h variometer with visual recorder Sensitivity : 3 Y/mm : 20 mm/hour MACQUARIE ISLAND MAGNETIC OSERVATORY G.D. Lodwiok, Observer in Charge Geographic Latitude 54 30'S Geomagnetic Latitude 'E Instruments La Cour QHMs Nos.177, 176, 179 La Cour MZ No. 64 Kew pattern magnetometer No.158 La Cour D, H & Z recording variometers Standard instrument : Sensitivity Rapid-run instrument: Sensitivity D 2.3 min/mm H 24 y/mm Z 21 Y/mm 15 mm/hour D 1.0 min/mm H 5.4 Y/mm Z 6.8 Y/mm 180 mm/hour

5 COKTRIUTING OSERVATORIES MAYJSOH MAGNETIC OSERVATORY R.J.S. Cooke. Observer in Charge Geographic Latitude 67 36'S Geomagnetic Latitude Instruments Askania declinometer No La Cour QHMs Nos.300, 301, 302 La Cour MZ No.62 La Cour D, H & Z recording variometers Normal sensitivity Low sensitivity ar fluxmeter D magnetograph D 0.9 min/mm H 9.4 Y/mm Z 10.0 Vnmi 15 mm/hour D 2.4 min/mm H 5 1 v/mm Z 50 Y/mm 15 mm/hour 5 mm/minute PORT MORESY MAGNETIC OSERVATORY J.A. rooks. Observer in Charge Geographic Latitude 9 24'S Geomagnetic Latitude 'E Instruments La Cour QHMs Nos.187, 188, 189 La Cour MZ No.68 Askania declinometer No La Cour D, H & Z recording variometers Standard instrument : Sensitivity Rapid-run instrument: Sensitivity 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 nan/hour

6 COMTRIDTING OSERVATOEIES TOOXAJJGI MAGMSTIC OSEVATORY C.A. van der Waal. Observer in Charge Geographic Latitude 37 32'S Geomagnetic Latitude 'E Instruments Huska magnetometer No.4813 La Cour QHMs Nos.288, 289, 290 La Cour MZ li[o.t19 La Cour D, H & Z recording variometers Sensitivity D 1.16 min/nmi H 4.6 Y/mm Z 4.4 y/mm 15 mm/hour WILKES MAGNETIC OSERVATORY G.R. Small, Observer In Charge Geographic Latitude 66''15'S Geomagnetic Latitude longitude 'E Instiruments C.I.W. field magnetometer and theodolite earthinductor No.28 La Cour QHMs Nos.492, 493, 494 La Cour MZ No.236 Ruska D, H & Z recording variometers Standard instrument : Sensitivity D 10.6 min/mm H 24 Y/mm Rapid-run instrument: Sensitivity Z 24 Y/mm 20 mm/hour D 1.3 min/nmi H 5.3 Y/mm Z 6.3 Y/mm 240 mm/hour

7 M A W S 0 N MAGMETIC K-INDICES - SEPTEMER 1964 Range for lower limit of K=9 is 1500 gammas Day E- Indices K-Sum PELIMIHARY MOMTHLY MEAN YALUES ased on 10 selected quiet days 1964 H Y, D 0 I Z Y September W

8 W I L K E S MAGNETIC K-INDICES - SEPTEMER 1964 Range for lower limit of K=9 is 2500 gammas Day K- Indices K-Sum b PRELIMINARY MONTHLY MEAU VALUES ased on 10 selected q.uiet days 1964 September H y 9229 D O t OW Z Y

9 M A C Q U A R I E ISLAND MASNETIC E-INDICES - SEPTEMER 1964 Range for lower limit of K=9 is 1500 gammas Day K- Indices K-Sum PRELIMIHARY MOTHLT MEAM VALUES ased on 10 selected quiet days 1964 H D Z Y o ' y September IE

10 T O O L A U a i MAGNETIC K-IKDIGES - SEPTEME 1964 Range fox lower limit of K=9 is 500 gammas Day K-Indices K-Sum _ H

11 T O O L A N G I PRELIMINARY MONTHLY MEAU VALUES ased on 10 selected quiet days 1964 H D Y X. 0 1 September ' E Z y PRINCIPAL MAGNETIC STORMS - SEPTEMER 1964 sudden max.activity storm time commencements act- 0 to 9 Ranges date begin end type amplitudes iv- ity day per. K D H Z 3-lir D H Z h m d h ' Y ssc* * SUDDEN COMMENCEMENTS ATO OTHER PHENOMENA - SEPTEMER 1964 Sense of Movement Day Time Type H D Z h m bp C pi bp pi pi2 C ssc* Pi pi pi bp C pi pi2 C pi si A bp pi bp bp bp C + +

12 G N A N G A R A MAGMSTIC K-INDICES - SEPTEMER 1964 Range for lower limit of K=9 is 350 gammas Lay K- Indices K-Sum H

13 G H A N G A R A PELIMIMARY MONTHLY MEAM VALUES ased on 5 selected quiet days 1964 H D y o» September W Z y PRINCIPAL MAGNETIC STORMS - SEPTEMER 1964 sudden max.activity storm time cominencements act- 0 to 9 Ranges date begin end type amplitudes IVity day per. K D H D H Z Z ssc ms m , SUDDEN COMMENCEMENTS AND OTHER PHENOMENA - SEPTEMER 1964 Day Time h m n U Type pc4 bp asc pi2 pi2 pi2 pc4 pi2 pi2 pi2 pi2 pc4 si si bps bp pi2 bps A A A Sense of MoYement H D Z + 11

14 P O R T M O R E S Y MAGHETIC K-IITPICES - SEPTMER 1964 Range for lo^er limit of K=9 is 300 gammas Day K-Indices K-Sum

15 POR T M O R E S Y PEELIMIMARY MOHTHLY MEM VALUES ased on 10 selected (juiet days 1964 H Y September D Z O I Y E PRIMCIPAL MA.GMETIC STORMS - SEPTEMER 1964 sudden max.activity storm time commencements a.ct- 0 to 9 Ranges date begin end type amplitudes iv- ity day per. K D H Z 3-lir D H Z h m d h. Y Y 1 Y Y ssc m ssc m 22 1,2 5, m SUDDEN COMMECEMEHTS AUD 1 OTEEE PHKNOMEHA SPimER 1964 Sense of Movement Day Time Type H D Z h m bp bps bp C bp C bp bp C 05 H 35 bp C ssc ssc ssc bp bp

16 6 is'jaeal! V,J 1