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CGS EQ Zapp - earthquake fault, liquefaction and landslide zones
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CGS Tsunami Hazard Area maps
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Last updated2019
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USGS earthquake feeds and catalogue (worldwide)
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USGS Earthquake Catalog (ComCat) FDSN event API
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ShakeAlert earthquake early warning
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USGS Water Data API: Monitoring locations and time-series metadata
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Legacy NWIS WaterServices (waterservices.usgs.gov) - retiring
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USGS Volcano Hazards (HANS) API
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U.S. Landslide Inventory and Susceptibility Map
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Last updated2025
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USGS gauge 11092450: Los Angeles River at Sepulveda Dam
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Last updated2026-08-25
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Smithsonian/USGS Weekly Volcanic Activity Report
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Last updated2026
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