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Quaternary Geology – An Essential Clue to Evaluating Seismicity

Allen, Clarence R. (1978) Quaternary Geology – An Essential Clue to Evaluating Seismicity. Earthquake Information Bulletin, 10 (1). pp. 4-11. ISSN 0046-0931.

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The geologic record, particularly that of the late Quaternary period, is a far more valuable tool in estimating seismicity and associated seismic hazard than has generally been recognized. This is simply because, by looking into the recent geologic past, the geologist is able to overcome many of the statistical inadequacies of the relatively short instrumental and historic records. These shortcomings are best illustrated in those parts of the world with the longest historic records of earthquakes—2000 years for Japan and the Middle East and 3000 years for China—where surprising variations in both the rates of recurrence and places of recurrence are evident. These long records show that earthquakes are by no means uniform in space and time, at least over intervals of only 1000 or 2000 years.

Item Type:Article
Additional Information:© 1978 USGS. This report is Contribution No. 2996 of the Division of Geological and Planetary Sciences, California Institute of Technology.
Group:Seismological Laboratory
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Caltech Division of Geological and Planetary Sciences2996
Issue or Number:1
Record Number:CaltechAUTHORS:20190910-160240515
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98562
Deposited By: Tony Diaz
Deposited On:10 Sep 2019 23:27
Last Modified:03 Oct 2019 21:42

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