Publication Date:
2000-05-20
Description:
The pattern of ground motion for a magnitude 5.7 earthquake near Tokyo was captured by 384 strong ground motion instruments across the Kanto sedimentary basin and its surroundings. The records allow the visualization of the propagation of long-period ground motion in the basin and show the refraction of surface waves at the basin edge. The refracted wave does not travel directly from the earthquake epicenter, but traverses the basin obliquely to the edge. The surface wave inside the basin propagates more slowly than that outside such that the wavefronts separate from each other, and the refracted wave heals the discrepancy in the speed of advance of the wavefronts inside and outside the basin. The refracted arrival is dominant near the edge of the Kanto basin.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Koketsu, K -- Kikuchi, M -- New York, N.Y. -- Science. 2000 May 19;288(5469):1237-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Earthquake Research Institute, University of Tokyo, Tokyo 113-0032, Japan. inquiry@taro.eri.u-tokyo.ac.jp〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10817997" target="_blank"〉PubMed〈/a〉
Keywords:
*Disasters
;
Geography
;
Japan
;
Meteorological Concepts
;
Rescue Work
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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