GEOPHYSICAL OBSERVATORY REPORT

Transcription

1 / ^ ^Commonwealth of australia DE^RTMENT OF NATIONAL DEVELOPMENT ^ ^feureau OF MINERAL RESOURCES, ^ ^ GEOLOGY AND GEOPHYSICS GEOPHYSICAL OBSERVATORY REPORT VOL 14 NO 2 FEBRUARY 1966 Issued under the authority of the Hon. David Fair bairn, g fj Minister for National Development S AUS. 6 copy 2

2 DEPARTMENT OF NATIONAL DEVELOPMENT Minister - Hon. David Fairbairn, D.F.C., M.P. Secretary - R.W. BOSWELL BUREAU OF MINERAL RESOURCES, GEOLOGY AND GEOPHYSICS Director - J.M. RAYNER This Report was prepared in the Geophysical Branch; Assistant - Director L.5. PRIOR Supervising - Geophysicist W.D. Parl<inson

3 CONTENTS Page Contributing Observatories 2 Geomagnetic Data : Mawson Wilkes Macquarle Island Toolangl Gnangara Port Moresby 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) Bureau of Mineral Resources, P.O. Box 37&, CANBERRA CITY, A.C.T.

4 CONTRIBUTING OBSERVATORIES GNANGARA MAGNETIC OBSERVATORY P. M. McGregor, Observer In Charge Geographic Latitude 31 ^7'S Geomagnetic Latitude Longitude 'E Longitude Instruments Askania magnetometer No La Cour QHMs No. 292, 293 La Cour BMZ No. 120 Eschenhagen D, H & Z recording variometers Sensitivity : D l.i mln/mm H 2.5 r/nrn Z 5.2 y/mm ": 20 mm/hour Askania (Eschenhagen type)h variometer with visual recorder Sensitivity : 3 y/mm : 20 mm/hour MACQUARIE ISLAND MAGNETIC OBSERVATORY E. J. Mulr, Observer in Charge Geographic Latitude 54 30'S Geomagnetic Latitude Longitude ISS^ST'E Longitude Instruments Askania declinometer No La Cour BMZ No. 64 La Cour QHMs Nos. 177, 178, 179 La Cour D, H & Z recording variometers Standard Instrument Sensitivity Rapid-run Instrument Sensitivity D 2.4mi H 25 r/mm Z 21 rvmm 15 mm/hour D 1.0 min/mm- H 5.4 r /mm Z 9 y /mm 180 mm/hour

5 CONTRIBUTING OBSERVATORIES MAWSON MAGNETIC OBSERVATORY P. Towson, Observer in Charge Geographic Latitude 67 36'S Geomagnetic Latitude Longitude 62 53'E Longitude 103.I Instruments Askanla declinometer No La Cour BMZ No. 62 La Cour QHMs Nos. 300, 301, 302 La Cour D, H & Z recording variometers Normal sensitivity Low sensitivity Bar fluxmeter D magnetograph D 0.9 mln/mm H 9.6 r/mm Z 10.0 r/mm 15 mm/hour D 2.4 mln/mm H 51 '' /mm Z 50 y/mm 13 mm/hour 5 mm/mlnute PORT MORESBY MAGNETIC OBSERVATORY D. Denham, Observer In Charge Geographic Latitude 9 24'S Geomagnetic Latitude -I8.7 Longitude l47 09'E Longitude Instruments Askanla declinometer No La Cour QHMs Nos. I87, I88, 189 La Cour BMZ No. 68 La Cour D, H & Z recording variometers Standard Instrument : Sensitivity Rapid-run Instrument Sensitivity D 0.44 mln/mm H 2.8 y/mm Z 3.3 y/mm 15 mm/hour D 0.05 mln/mm H 1.2 y/mm Z 0.3 y/mm 180 mm/hour

6 CONTRIBUTING OBSERVATORIES TOOLANGI MAGNETIC OBSERVATORY C. A. van der Waal, Observer in Charge Geographic Latitude 37 32'S Geomagnetic Latitude Longitude Longitude 'E Instruments Ruska magnetometer No La Cour QHMs Nos. 288, 289, 290 La Cour BMZ No. 119 La Cour D, H & Z recording variometers Sensitivity D 1.2 H 4.5 Z 4.4 mln/mm r /mm Y /mm : 15 mm/hour WILKES MAGNETIC OBSERVATORY F. J. Taylor, Observer In Charge Geographic Latitude 66 15'S Geomagnetic Latitude Longitude 'E Longitude Instruments Askanla declinometer No La Cour QHMs Nos. 492, 493, 494 La Cour BMZ No. 236 Ruska D, H & Z recording variometers Standard Instrument : Sensitivity Rapid-run Instrument :Sensitivity D 10 mln/mm H 25 r/mm Z 21 r/mm 20 mm/hour D 1.1 mln/mm H 5.1 y/mm Z 7 y/mm 240 mm/iiour

7 M A W S 0 N MAGNETIC K-INDICES - FEBRUARY 1966 Will tie published when available. PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days 1966 H D Z r r February I836O 6l 2ll4W

8 WILKES MAGNETIC K-INDICES - FEBRUARY I966 Range for lower limit of K=9 Is 2500 gammas Day K- Indices K-Sum PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days 1966 H D Z y r February '.2W

9 M A C Q U A R I E ISLAND MAGNETIC K-INDICES - FEBRUARY I966 Range for lower limit of K=9 Is I5OO gammas Day K- Indices K-Sum ' _ PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days 1966 H D Z r, y February E

10 TOOLANGI MAGNETIC K-INDICES - FEBRUARY 1966 Range for lower limit of K=9 is 500 gammas Day K- Indices K-Sum

11 TOOLANGI PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days 1966 H D Z y Y February io 33:iE PRINCIPAL MAGNETIC STORMS - FEBRUARY 1966 NIL SUDDEN COMMENCEMENTS AND OTHER PHENOMENA - FEBRUARY I966 Sense of Movement Day Time Type H D Z h m Pl2 B pl2 B bp B bp B t bp B bp B Pl2 B bp B Pl2 B l pl2 B pi2 B bp E t -f bp C si B

12 GNANGARA MAGNETIC K-INDICES - FEBRUARY 1966 Range for lower limit of K-9 is 350 gammas Day K-Indlcea K-Sum

13 GNANGARA PKELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days 1966 H D Z r y February 'lW -53^96 PRINCIPAL MAGNETIC STORMS - FEBRUARY I966 NIL SUDDEN COMMENCEMENTS AND OTHER PHENOMENA - FEBRUARY I966 Sense of Movement Day Time Type H D Z h m pl2 B bp B pi2 B bp B + -f bp B ssc B pl2 B NOTE : No record 24th, 25th 11

14 PORT MORESBY MAGNETIC K-INDICES - FEBRUARY I966 Range for lower limit of K=9 Is 300 gammas Day K-Indlces K-Sum r _ X > J i *

15 PORT MORESBY PRELIMINARY MONTHLY MEAN VALUES Based on 10 selected quiet days 1966 H D r February !2E PRINCIPAL MAGNETIC STORMS - FEBRUARY I966 sudden max.activltj/ storm time commencements act- 0 to 9 Ranges date begin end type amplitudes iv- ity day per. 3-hr K D H Z D H Z h m d h y y SUDDEN COMMENCEMENTS AND OTHER PHENOMENA - FEBRUARY I966 Sense of Movement Day Time Type H D Z h m bp B bp B bp C + -f bp B bps B 4- -f bps C T + + SOLAR FLARE EFFECTS - FEBRUARY I966 Amplitude Day Begin Max. End H D Z