地震详情：美国 蒙大拿州 Helena Valley Northeast 东北偏东 32 公里

地震信息自动汇总自下列官方地震监测机构。初步测量结果可能随机构复核而调整；涉及安全决策时请遵循当地应急管理部门的信息。 最近一次成功更新：2026年7月23日 UTC 20:01。

数据来源:

• USGS — Credit: U.S. Geological Survey.
• EMSC — Credit: EMSC/CSEM. Event catalogue data are provided under CC BY 4.0. CC BY 4.0
• 日本气象厅 — Source: Japan Meteorological Agency (JMA).
• 澳大利亚地球科学局 — Based on Australian Earthquakes data by Geoscience Australia. © Commonwealth of Australia. Licensed under CC BY 4.0; the section 5 disclaimer applies. CC BY 4.0
• 新西兰 GeoNet — We acknowledge the New Zealand GeoNet programme and its sponsors NHC, Earth Sciences NZ, LINZ, NEMA and MBIE for providing earthquake data.