Fukui earthquake

An earthquake occurred in the Fukui Plain at around 16:13 on June 28, 1948 (Showa 23). It was 7.3 on the Richter scale, with a very shallow epicenter at a depth of 0 km, 3,892 deaths, 35,420 houses completely destroyed, and 11,816 houses partially destroyed. Many areas in the central Fukui Plain had a 100% complete destruction rate, and the experience of this earthquake led to the creation of the Japan Meteorological Agency's seismic intensity scale of VII. The shaking was so intense that houses collapsed within 5 to 15 seconds. Fires broke out in various areas, destroying 3,851 houses. No visible faults were found, but precise surveys revealed a 25 km long fault (the east side is uplifted about 70 cm from the west side) running north-northwest to south-southeast on the eastern edge of the Fukui Plain.

[Usami Tatsuo]

Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend

1948年（昭和23）6月28日16時13分ごろ、福井平野に発生した地震。規模はM7.3、震源の深さはきわめて浅く、0キロメートル、死者3892人、家屋全壊3万5420、半壊1万1816、福井平野の中央部では家屋全壊率100％の所が多く、この地震の経験から気象庁震度階級にⅦが生まれた。震動は激しく、家屋は5～15秒くらいの間に倒壊した。各地で火災が発生し3851戸が焼失した。目に見える断層は生じなかったが、精密測量の結果、福井平野の東縁に北北西―南南東方向の長さ25キロメートルの断層（東側が西側に対し約70センチメートル隆起）がみいだされた。

［宇佐美龍夫］

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