三河地震における深溝断層の屈曲部について

坂部 和夫, 飯田 汲事

doi:10.4294/zisin1948.25.1_44

三河地震における深溝断層の屈曲部について

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坂部和夫

愛知県立碧南高等学校
飯田汲事

愛知工業大学

書誌事項

タイトル別名

The Turning of the Fukozu Fault Associated with the Mikawa Earthquake in 1945
三河地震における深溝断層の延長部について
ミカワジシンニオケルフカミゾダンソウノエンチョウブニツイテ
ミカワジシンニオケルフコウズダンソウノクッキョクブニツイテ
The Extension of the Fukozu Fault Associated with the Mikawa Earthquake in 1945

公開日: 1983

DOI

10.4294/zisin1948.36.3_351
10.4294/zisin1948.25.1_44

公開者: 公益社団法人日本地震学会

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説明

The turning of the Fukozu fault associated with the 1945 Mikawa earthquake was investigated by the present geological survey. It was ascertained that the fault had two continuous bends designated the first and third bend, and two discontinuous bends designated the second and fourth bend. Consequently the Fukozu fault is considered to be composed of three separated earthquake faults.<br>Judging from the formation of these faults, their major features may be explained as the results of an east-northeastward upthrusting of three land blocks on the west-southwestern sides of the faults.<br>These three faults are all active ones and the left-lateral displacement along the WSWENE course of the first fault (from Atsumi Bay to Maeno) has presumably accumulated in the same direction, a total distance being about 450m. Our survey, moreover, revealed that the west-southwestern extension of the WSW-ENE course of the first fault might be probably an active fault.