Recent Earthquakes

In addition to displaying earthquakes by magnitude, this service also provide earthquake impact details. Impact is measured by population as well as models for economic and fatality loss. For more details, see: PAGER Alerts.Consumption Best Practices:As a service that is subject to very high usage, ensure peak performance and accessibility of your maps and apps by avoiding the use of non-cache-able relative Date/Time field filters. To accommodate filtering events by Date/Time, we suggest using the included "Age" fields that maintain the number of days or hours since a record was created or last modified, compared to the last service update. These queries fully support the ability to cache a response, allowing common query results to be efficiently provided to users in a high demand service environment.When ingesting this service in your applications, avoid using POST requests whenever possible. These requests can compromise performance and scalability during periods of high usage because they too are not cache-able.Update Frequency: Events are updated as frequently as every 5 minutes and are available up to 30 days with the following exceptions:Events with a Magnitude LESS than 4.5 are retained for 7 daysEvents with a Significance value, 'sig' field, of 600 or higher are retained for 90 daysIn addition to event points, ShakeMaps are also provided. These have been dissolved by Shake Intensity to reduce the Layer Complexity.The specific layers provided in this service have been Time Enabled and include:Events by Magnitude: The event’s seismic magnitude value.Contains PAGER Alert Level: USGS PAGER (Prompt Assessment of Global Earthquakes for Response) system provides an automated impact level assignment that estimates fatality and economic loss.Contains Significance Level: An event’s significance is determined by factors like magnitude, max MMI, ‘felt’ reports, and estimated impact.Shake Intensity: The Instrumental Intensity or Modified Mercalli Intensity (MMI) for available events.For field terms and technical details, see: ComCat DocumentationAlternate SymbologiesVisit the Classic USGS Feature Layer item for a Rainbow view of Shakemap features.RevisionsFeb 13, 2024: Updated feed logic to remove Superseded eventsThis map is provided for informational purposes and is not monitored 24/7 for accuracy and currency. Always refer to USGS source for official guidance.If you would like to be alerted to potential issues or simply see when this Service will update next, please visit our Live Feed Status Page.

除以震级展示地震事件外，本服务还提供地震影响细节。影响评估依据人口数量、经济损失和经济损失模型。欲获取更多详细信息，请参阅：PAGER警报。最佳实践：鉴于本服务使用频率极高，为确保地图和应用的峰值性能与可用性，请避免使用无法缓存的相对日期/时间字段过滤器。为适应按日期/时间过滤事件，我们建议使用包含的“年龄”字段，这些字段记录了自记录创建或最后修改以来至上次服务更新所经过的天数或小时数。这些查询完全支持缓存响应的能力，使得在需求旺盛的服务环境中，用户可以高效地获得常见查询结果。在将此服务集成到您的应用程序中时，尽可能避免使用POST请求，因为这些请求在高峰使用期间可能会损害性能和可扩展性。更新频率：事件更新频率最高可达每5分钟一次，可提供长达30天的数据，以下情况除外：震级小于4.5的事件保留7天；显著性值（'sig'字段）为600或以上的事件保留90天。此外，还提供震中图。这些图已根据震中强度进行溶解，以降低图层复杂性。本服务提供的特定图层已被时间启用，包括：按震级展示的事件：事件的地震震级值。包含PAGER警报等级：美国地质调查局PAGER（全球地震快速响应评估）系统提供自动化的影响等级分配，估算伤亡和经济损失。包含显著性等级：事件的重要性由震级、最大MMI、感觉报告和估计影响等因素确定。震中强度：可用事件的仪器强度或修正的麦卡利震级（MMI）。有关字段术语和技术细节，请参阅ComCat文档。备用符号学访问经典USGS特征层项以查看震中图特征的彩虹视图。修订：2024年2月13日：更新了馈送逻辑，以删除已替代的事件。本图提供信息参考，不进行24/7的准确性和时效性监控。请始终参考USGS来源以获取官方指导。如果您想收到潜在问题的警报或查看本服务下次更新的时间，请访问我们的实时流状态页面。