学会誌「自然災害科学」

1999年台風18号の通過時に発生した山口県小野田市の竜巻災害

Tornado Disaster Occurred Through Typhoon 9918 (Bart) in Onoda City of Yamaguchi Prefecture

山本 晴彦*・丸山 敬**・岩谷 潔***・鈴木 賢士*・早川 誠而*

Haruhiko YAMAMOTO*, Takashi MARUYAMA**, Kiyoshi IWAYA***, Kenji SUZUKI* and Seiji HAYAKAWA*

Abstract

Typhoon 9918 (Bart) passed through the Kyushu and the western part of Chugoku district on September 24, 1999. As the typhoon passed, a tornado occurred in Onoda City of Yamaguchi Prefecture. The recorded peak gust speed was 52.0 m/s at the Onoda fire station, 150 m away from the path of the tornado. The air pressure had decreased by 3.6 hPa at 7:59, while the minimum value was recorded as 961.6 hPa. The width of the tornado's path estimated from damags of houses was 50-150 m and its length was 5.1 km. The number of seriously injured persons was 13, and the number of houses damaged was about 650. Fujita and Piason scales were estimated to be F2 and P2 (length:1.6-5.1 km, width:51-160 m), respectively.

キーワード:

Key words: