著者
関谷 溥
出版者
Tokyo Geographical Society
雑誌
地学雑誌 (ISSN:0022135X)
巻号頁・発行日
vol.79, no.3, pp.175-180, 1970-06-25 (Released:2009-11-12)
参考文献数
7

September 1, 1923, southern Kanto was devastated by a severe earthquake. The main shock of the events, which occurred at 11 h 58 m (JST), was felt all over Japan. The highest seismic intensity is 7 in JMA scale at the southern part of Kanagawa, Tokyo and Chiba prefectures. The epicenter is located on the Sagami-nada. Parameters of the main shock given by the Japan Meteorological Agency are as follows ;origin time : 11 h 58 m, September 1, 1923.epicenter : 35° 20' N, 139° 20' Emagnitude : 7.9The earthquake was accompanied by many fore- and after-shocks. The foreshocks occurred in Kashima-nada. It seems that the foreshock activities began in May 1923 and became vigorous in June 1923 before the occurrence of the main shock.The aftershocks occurred in Kanagawa, Yamanashi, Saitama, Chiba, Ibaraki prefectures and near seas, and the general trend in decrease of daily number of the aftershocks can be explained by Omori's generalized formula.

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関東大震災の2ヶ月前に銚子付近で地震があったらしい… #備えよう https://t.co/U2NEIPfBE7
#千葉の地震 最大震度5弱で、5月に記録的な高温や、かなりの前兆現象のわりに少し揺れが小さいような気がします。関東大震災の前震は、数100回の群発地震も起きています。 文献↓ 1923年関東震災の前震と余震について(関谷博) https://t.co/i6QwTH1i9P

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