Data field · Event

Earthquake magnitude

The magnitude of a seismic event on the stated scale; unlike generic event magnitude, this is specifically searchable and modeled as earthquake severity.

Who carries it ↓

2Data sources

2Providers

2Free to access

Sources that carry it

2 sources

NOAA National Centers for Environment…

NCEI/WDS Global Historical Tsunami Database

Ongoing global historical database of related tsunami source-event and observed runup-location tables, spanning 2100 BC to the present. It emits event source/time/location, cause, validity, magnitude/intensity, maximum water height and historical effects plus runup observation location, arrival/travel time, measurement type, water height, horizontal inundation and location effects. Reporting is heterogeneous and is neither a completeness claim nor prospective hazard. Pin DOI 10.7289/V5PN93H7, retrieval date/query and API schema.

Free APIFull file Global 26 fields

U.S. Geological Survey

USGS ComCat and ShakeMap API

Open earthquake catalog API with per-event GeoJSON detail and downloadable ShakeMap grids containing event identity, time, magnitude, MMI, and map-version metadata.

Free APIFull file Global 3 fields

Questions it helps answer

Tsunami occurrence and runup history Historical catastrophe loss patterns Earthquake occurrence and magnitude history Earthquake shaking at the event location

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