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Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

Historical Seismograms - Evidence from the AD 2000 Izu Islands ...

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<strong>Seismograms</strong> Before 1963 in <strong>the</strong> South- West Pacific 461<strong>the</strong> station was destroyed by fire. The previous year’s records are believed to havebeen recovered after <strong>the</strong> fire, but lost in shipment. It is <strong>the</strong>refore just possible that<strong>the</strong>y still exist, perhaps in <strong>the</strong> U.S.A., but have not been identified. Preliminaryreadings had been sent to Wellington by radio, and have been published. Afterinterpretation in Wellington, <strong>the</strong> rest of <strong>the</strong> records were sent to Lamont Observatoryfor storage. The Wellington archive contains a file of full-sized copies of <strong>the</strong>long-period records of teleseisms in 1961 January and 1961 August.6.2. Adklie LandSome confusion exists with respect to recording in French Antarctica before 1955.In 1950 <strong>the</strong> privately organized Missions Paul-Emile Victor set up a base on a smallisland off <strong>the</strong> coast near Pointe Gkologie. It operated for three seasons, and was<strong>the</strong>n evacuated until 1955, when it was re-occupied. Earthquake recording beganin 1951 March, apparently with a short-period vertical seismometer. Details of <strong>the</strong>equipment and of <strong>the</strong> fate of <strong>the</strong> records are now uncertain. If <strong>the</strong>y still exist <strong>the</strong>yare presumably in France.The base at Dumont d’Urville (DRV) was established for <strong>the</strong> International GeophysicalYear, and operated three short-period APX instruments between 1957April 14 and 1962 December 12. The Institut de Physique du Globe in Strasbourghas records of 236 shocks made during this period. All are in good condition.ACKNOWLEDGEMENTSI wish to thank <strong>the</strong> many observatories who have answered enquiries, especiallythose who fruitfully re-directed <strong>the</strong> course of my search. In particular I must instanceDr. Robin Adams of <strong>the</strong> International Seismological Centre, M. R. Louatof ORSTOM, Noumka, and those members of <strong>the</strong> staff of <strong>the</strong> Lamont-DohertyObservatory who unear<strong>the</strong>d correspondence containing details of operations in Fiji,incidentally throwing light on obscure parts of <strong>the</strong> Pacific.REFERENCESAngenheister, G. (1922). List of <strong>the</strong> most important earthquakes registered at <strong>the</strong> Observatory,Apia, Samoa, <strong>from</strong> 1913 to 1920, Nachr. Ges. Wissensch. Gottingen, Math-phys.Klasse pp 1-3.Eiby, G. A. (1985). Documenting New Zealand earthquakes, this volume.Smith, W. D. (1981). A short history of New Zealand seismograph stations, N. 2. Dept.of Scientific and Industrial Research, Geophysics Division Report 171, 27 pp.Young, R. M., J. H. Ansell, and M. A. Hurst (1984). New Zealand’s first seismograph:<strong>the</strong> Hector seismograph 1884-1902, J . Roy. SOC. N. Z., 14, 159-173.

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