日本茨城县波崎东南144公里海域发生6.1级地震：震源深度29公里、无海啸威胁
日本关东地区东部近海11月6日发生6.1级地震。据美国地质调查局测定，地震发生于协调世界时6日10时39分（日本时间19时39分，美西时间凌晨2时39分），震中位于茨城县波崎东南约144公里海域（北纬34.97度、东经142.12度），震源深度约29公里。
日本气象厅表示，这次地震发生在关东地区东部近海，未发布海啸预警，美国地质调查局亦确认无海啸威胁。该局的灾害评估系统（PAGER）给出绿色警报，意味着造成人员伤亡与经济损失的可能性很低；该局收到22份有感报告。截至发稿，未见人员伤亡或重大财产损失的报告。
日本地处环太平洋火山带，太平洋板块在其东侧海域俯冲，近海浅源强震时有发生。本站将继续关注日本气象厅与美国地质调查局的后续测定。
（来源：美国地质调查局）
Magnitude 6.1 Earthquake Strikes 144 Kilometers Southeast of Hasaki, Japan: 29 Kilometers Deep, No Tsunami Threat
A magnitude 6.1 earthquake struck off Japan's eastern Kanto coast on November 6. According to the U.S. Geological Survey, the quake occurred at 10:39 UTC (7:39 p.m. Japan time, 2:39 a.m. Pacific time), with its epicentre about 144 kilometers southeast of Hasaki, Ibaraki Prefecture (34.97 degrees north, 142.12 degrees east), at a depth of about 29 kilometers.
The Japan Meteorological Agency said the quake occurred in the sea off the eastern Kanto region and issued no tsunami warning; the U.S. Geological Survey likewise confirmed there was no tsunami threat. The agency's PAGER assessment system issued a green alert, indicating a low likelihood of casualties or economic damage, and 22 people reported feeling the quake. As of publication, there were no reports of casualties or major property damage.
Japan sits on the Pacific Ring of Fire, where the Pacific Plate subducts east of the archipelago and shallow offshore earthquakes are frequent. GSM will continue to follow updated measurements from the Japan Meteorological Agency and the U.S. Geological Survey.
(Source: U.S. Geological Survey)
来源：美国地质调查局
发布：GSM·美国（发布链接）
图片来源：图：美国地质调查局（USGS）发布的本次地震烈度图，震中位于日本茨城县波崎东南约144公里、震源深度约29公里。图片：USGS，公共领域。 / ShakeMap intensity map for this earthquake, released by the U.S. Geological Survey (USGS): epicentre about 144 km southeast of Hasaki, Ibaraki Prefecture, Japan, at a depth of about 29 km. Image: USGS, public domain.
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