Query earthquake events from an FDSN datacenter with flexible parameters.

Returns a compact tabular result (columns + rows), one row per event, using the preferred origin and magnitude. Depth is in KILOMETERS. For the full detail of a single event (all origins/magnitudes, arrivals, focal mechanism) use the by-id tools.

Common usage examples:

• Recent events (today): {} (no parameters needed)

• Significant events: {"minmag": 4.0, "starttime": "YYYY-MM-DDTHH:MM:SS"}

• Geographic area: {"minlat": 41.0, "maxlat": 43.0, "minlon": 12.0, "maxlon": 15.0}

• Radial search: {"latitude": 41.9, "longitude": 12.5, "maxradiuskm": 50}

• Strongest first: {"orderby": "magnitude", "limit": 10}

• Next page: {"offset": 101} (offset + returned_count from the previous call)

Available datacenters: INGV (default), EMSC, GFZ, USGS, and others supported by ObsPy.

Get basic information about a specific earthquake event by event ID.

Returns the preferred origin, preferred magnitude, station magnitudes, and amplitudes. For detailed data (all alternative origins, all alternative magnitudes, or seismic arrivals/picks), use the specialized tools instead.

The eventid is an opaque, provider-specific string and MUST be copied verbatim from a prior fdsn_query_earthquakes result (EventID column). Never invent, guess, reformat, or use placeholder values.

Available datacenters: INGV (default), EMSC, GFZ, USGS, and others supported by ObsPy.

Get all seismic phase arrivals for an earthquake event, including linked pick data (station, time, phase). Use this when asked about recorded phases, station readings, or seismic wave arrivals.

The eventid is an opaque, provider-specific string and MUST be copied verbatim from a prior fdsn_query_earthquakes result (EventID column). Never invent, guess, reformat, or use placeholder values.

Available datacenters: INGV (default), EMSC, GFZ, USGS, and others supported by ObsPy.

Get all computed magnitude solutions for an earthquake event. Use this when asked about different magnitude types (ML, Mw, Mb, Md), magnitude comparisons across agencies, or station counts.

The eventid is an opaque, provider-specific string and MUST be copied verbatim from a prior fdsn_query_earthquakes result (EventID column). Never invent, guess, reformat, or use placeholder values.

Available datacenters: INGV (default), EMSC, GFZ, USGS, and others supported by ObsPy.

Get all computed origin solutions (hypocenter locations) for an earthquake event. Use this when asked about alternative locations, origin comparisons, or which agencies computed origins.

The eventid is an opaque, provider-specific string and MUST be copied verbatim from a prior fdsn_query_earthquakes result (EventID column). Never invent, guess, reformat, or use placeholder values.

Available datacenters: INGV (default), EMSC, GFZ, USGS, and others supported by ObsPy.

Get focal mechanism and moment tensor data for an earthquake event. Returns nodal planes (strike, dip, rake), principal axes (T, P, N), and moment tensor components when available. Use this for understanding the rupture geometry and seismic source characteristics.

The eventid is an opaque, provider-specific string and MUST be copied verbatim from a prior fdsn_query_earthquakes result (EventID column). Never invent, guess, reformat, or use placeholder values.

Available datacenters: INGV (default), EMSC, GFZ, USGS, and others supported by ObsPy.