
日本氣象廳提醒未來一週仍可能發生震度5強地震,需留意落石與土石崩落風險
日本愛知縣凌晨發生規模5.7地震,最大震度5強,震央位於靜岡縣西部。氣象廳研判不會對南海海槽板塊交界造成明顯影響,但提醒未來一週仍可能發生震度5強地震,需留意落石與土石崩落風險。
AI-generated summary
愛知縣上一次觀測到震度5強已是1997年3月,當時愛知縣東部發生規模5.9地震,豐橋市觀測到震度5強。這次是自1919年開始統計以來,首次出現以靜岡縣西部為震央、最大震度達到5強的地震。
日本愛知縣今天凌晨發生規模5.7地震,由於震央位於南海海槽巨大地震的預估震源區內,引發外界關注。日本氣象廳表示,從這次地震的規模及發生機制來看,研判不會對南海海槽的板塊交界造成明顯影響,不過未來一週要留意可能再次發生震度5強的地震。
NHK報導,根據日本氣象廳觀測,這起地震發生在今天凌晨1時4分左右,震央位於靜岡縣西部,地震規模5.7,震源深度41公里。
其中,愛知縣知多市觀測到最大震度5強;豐田市、刈谷市、東海市,以及靜岡縣濱松市、岐阜縣惠那市、長野縣賣木村等地,也出現震度5弱的搖晃。地震影響範圍相當廣,從關東到中國、四國地區都能感受到搖晃,所幸沒有引發海嘯的疑慮。
主震發生後,當地仍持續出現餘震;凌晨2時過後,愛知縣東部又發生規模3.3地震,最大震度2。氣象廳提醒,受到強烈搖晃影響的地區,未來一週左右仍可能發生震度5強的地震,尤其山區發生落石、土石崩落的風險也可能升高,民眾應特別留意。
這次地震也讓外界擔心,是否與未來可能發生的南海海槽巨大地震有關。
對此,氣象廳說明,這次地震雖然發生在南海海槽巨大地震的預估震源區內,但震源深度及發生機制不同,加上地震規模不大,研判不會對板塊交界的狀態造成特殊影響。
東京科學大學地震學教授中島淳一指出,這次地震發生在隱沒中的菲律賓海板塊內部,可能因此產生較強烈的短週期震動,導致玻璃破裂、物品傾倒等災情,未來仍須留意同等程度的強烈搖晃。
他認為,從震源位置及規模來看,這次地震不太可能誘發南海海槽巨大地震,但未來一週仍要注意同等規模的地震再次發生。
值得注意的是,愛知縣上一次觀測到震度5強,已經是1997年3月,當時愛知縣東部發生規模5.9地震,豐橋市觀測到震度5強。這次則是自1919年開始統計以來,首次出現以靜岡縣西部為震央、最大震度達到5強的地震。(編輯:楊昇儒)
AI outlook — possibilities, not facts
未來一週愛知縣及鄰近地區仍可能發生震度5強的地震
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