著者

藤井 陽一郎

出版者

日本測地学会

雑誌

測地学会誌 (ISSN:00380830)

巻号頁・発行日

vol.23, no.2, pp.74-81, 1977-09-25 (Released:2010-09-07)

参考文献数

9

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Most of abrupt coastal upheaval associated with earthquake are interpreted as result of reverse faulting with low dip angle. The results of levelling suggest a possibility that seismic crustal upheaval along the coast of Sanriku, northeast Japan, were associated with the 1933 Sanriku-oki earthquake with magnitude 8 .3, although the earthquake is normal faulting on the Japan trench. In order to test whether the earthquake could have given coastal upheaval or not, crustal movements are calculated with the following fault parameters for the 1933 Sanriku-oki earthquake;Strike of fault N3°ELength of fault 300 kmWidth of fault 100 kmDip angle 45°Normal slip 6.6 m The results show a 4-6 cm seismic upheaval along the Sanriku coast and horizontal crustal strain with 2-4×10-6 in the east and middle part of northeast Japan . This normal faulting of the 1933 earthquake gave additional crustal strain and would be a trigger of some geophysical phenomena such as earthquake swarms or occurrence of deep earthquakes.

著者

藤井 陽一郎

出版者

日刊工業新聞社

雑誌

原子力工業 (ISSN:04334035)

巻号頁・発行日

vol.28, no.1, pp.p29-32, 1982-01