联邦地质调查局(USGS)发表最新研究报告,表示100年内可能出现严重甚至灾难性地震,全国3/4地区面对威胁,其中包括纽约、首都华盛顿等中大西洋和东北部地区,加州、夏威夷、阿拉斯加也属于高危地区。
综合地质局官方公告与《今日美国》报道,部门首次以最新的地震灾害模型,绘制出50个州份的潜在风险图,并以由红至蓝等6种颜色列出风险级别。这次的地图覆盖75%国土面积,纽约、费城、波士顿、首都华盛顿等东北部城市都包括在内,向来是地震热点的加州和阿拉斯加,未来数十年受灾的风险也较高,夏威夷同样榜上有名。
在这次研究中,地质局率领超过50名科学家及工程师,整理了各地的数据、历年地震资料,参与撰写报告的地球物理学家彼得森(Mark
Petersen)表示,地震的具体时间和地点极难预测,但新的模型已让同行取得很大进步,希望可以增强公共安全意识。
团队希望,无论是建筑师、工程人员还是立法机关,都能参考信息继而应变,也反映地质学家与工程师可以协助基建,保障数以亿计民众安全。
报告表示,在过去200年全美37州曾发生里氏5级以上的地震,这次还发现近500处断层,不排除区内未来会有震动。报告内容已经发表于科学期刊《地震谱》(Earthquake
Spectra)。
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