21年12月8日/【关注美国俄勒冈州附近区域的地震活动及后续】
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10.0 km 回,目前看美国俄勒冈州附近区域de地震活动是震群型地震吗?近期需要注意7以上地震吗?预计主震活动上限在多大左右? 5.2
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10.0 km 回,美国俄勒冈州附近区域的地震活动目前是否又在逐渐减弱的趋势? 美国俄勒冈海岸附近48小时内发生近100次地震
光明网
12/10 15:33
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海外网12月10日电
据美媒报道,美国俄勒冈海岸附近在48小时内发生了近100次地震。
美国有线电视新闻网12月9日报道,从7日凌晨至9日的48小时内,美国俄勒冈海岸附近发生了近100次地震,期间至少发生了9次震级达到5.0至5.8级的地震。不过,陆地上几乎感觉不到,也没有造成任何破坏。
美国地质调查局表示,地震群发生在布兰科断裂带,并不是会形成海啸的巨型逆冲断层。不过,布兰科断裂带的震动有可能持续数天甚至数周。地震学家露西·琼斯(Lucy Jones)表示,布兰科断裂带是北美地震最活跃的地区之一,但它很少导致破坏性地震。自1980年以来,布兰科断裂带上发生了超过133次5.0级或更大的地震,但是从未在地面上出现明显震感。(海外网-美国-乔珊珊/实习编译-孔天翊) 回,目前看美国俄勒冈州附近区域的地震活动属于什么类型?后续主震震级上限趋势在多大左右?
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