日本近海发生6.0级深源地震：震源深度352公里、无海啸威胁
美国地质调查局（USGS）记录，日本三重县 Shima 市东南偏南约58公里的近海于世界时10月31日22时15分（日本时间11月1日7时15分）发生6.0级地震，震源深度约352.4公里，属于深源地震。USGS 地震事件编号为 us7000tuku，测定已经过复核。
USGS 的 PAGER 系统对这次地震发出绿色警报，意味着出现人员伤亡与经济损失的可能性较低。截至 USGS 更新时，共有16人通过其系统报告有震感，测得的最大烈度约为 III 度。由于震源极深，震动在传到地表时已大幅衰减。
这次地震没有引发海啸威胁，USGS 记录的海啸标志为零，太平洋海啸预警中心也没有发布相关警报。暂无人员伤亡或财产损失的报告。
深源地震发生在地表以下300公里以上的深度，震中一带位于太平洋板块向菲律宾海板块下方俯冲的区域。此类地震往往震感范围较广，但因能量在长距离传播中耗散，对地表的破坏通常远小于同震级的浅源地震。
Magnitude 6.0 Deep Earthquake Strikes Off Shima, Japan: 352 km Deep, No Tsunami Threat
A magnitude 6.0 earthquake struck off Japan at 22:15 UTC on October 31 (07:15 on November 1, Japan time), about 58 kilometres south-southeast of Shima in Mie Prefecture, at a depth of about 352.4 kilometres, according to the U.S. Geological Survey (USGS). The deep-focus event, catalogued by the USGS as event us7000tuku, has been reviewed by seismologists.
The USGS PAGER system issued a green alert for the quake, indicating a low likelihood of casualties and damage. Sixteen people reported feeling the shaking through the USGS system, and the maximum measured intensity was about III on the Modified Mercalli scale. Because the rupture began more than 350 kilometres underground, the shaking had weakened substantially by the time it reached the surface.
The earthquake posed no tsunami threat: the USGS recorded a tsunami flag of zero, and no warning, watch or advisory was issued. There were no immediate reports of casualties or damage.
Deep-focus earthquakes occur more than 300 kilometres below the surface. The epicentral area lies where the Pacific Plate subducts beneath the Philippine Sea Plate. Such quakes can be felt over a wide area, but their energy dissipates over the long path to the surface, so they typically cause far less damage than shallow earthquakes of the same magnitude.
来源：GSM·美国（原文链接）
图片来源：图：美国地质调查局（USGS）发布的本次地震烈度图，震中位于日本三重县 Shima 市东南偏南约58公里、震源深度约352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 58 km south-southeast of Shima, Mie Prefecture, Japan, at a depth of about 352 km. Image: USGS, public domain.
