（东京8日综合电）日本熊本7月28日发生7.1级强震，截至8日已造成39人罹难，另有23人重伤。随着灾后调查持续进行，学者也发现一项令人忧心的现象。
《朝日新闻》报导，广岛大学教授熊原康博与福冈教育大学讲师岩佐佳哉率领研究团队，自强震隔天起展开为期5天的实地勘查，走访148个地点后确认，此次地震震源所在的“日奈久断层带”长达约38公里的裂缝露出地表，以7.1级地震而言，这样的长度仍属罕见。
研究发现，其中北侧约7公里的区段与2016年熊本地震时地表错动的位置恰好重合。此区段在10年前的前震、主震期间先后错动，此后更持续7年朝同一方向缓慢位移，如今又在相同位置发生错动。熊原康博直言，“这是与过去对活断层认知截然不同的现象。”
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