# SeismicPortal.eu The SeismicPortal.eu site is operated by the EMSC (Euro-Mediterranean Seismological Centre) and is where it makes its datasets available via various web services and data API. A list of the webservices available is found at: https://www.seismicportal.eu/webservices.html Somewhat independently from this (although using all of the webservices provided), the front page presents an interactive map and table of recent Earthquakes. This table and map of events can be filtered interatively by the user. Clicking on individual events in the table of Earthquakes will open a new browser tab presenting the information avaiable for that event; including the earthquake orgins collected from different institutes, the seismic wave detected at different seismic stations, any moment tensor estimations collected and any felt reports collected from users. The front page also provides links to other major European data portals for seismological research data. Note that although the SeismicPortal catalog is almost identical to the catalog available on the https://www.emsc-csem.org website, it uses a different ID system. The eventid consists of a date and enumeration joins by a (e.g. 20260605_0000208) while the main site's EVID (event ID) is a strictly increasing integer (ordered only by the time of definition at the EMSC rather than the order of events). ## Main web services / APIs - A global real-time earthquake catalog (updated continuously, < 5 min latency): www.seismicportal.eu/fdsn-wsevent.html - A catalog of crowdsourced felt reports and impact data (citizen seismology): www.seismicportal.eu/testimonies-ws/ - A catalog of moment tensor solutions for earthquakes: www.seismicportal.eu/mtws/ - A service to find the various IDs used in different catalogs for a single event: www.seismicportal.eu/eventid/ - A catalog of rupture models based on the SRCMOD database of Martin Mai: www.seismicportal.eu/srcmodws/ - A service to find the Flinn-Engdahl region for any coordinate of latitude and longitude: www.seismicportal.eu/feregions.html - A websocket service that publishes realtime notification of new and updated earthquakes events: www.seismicportal.eu/realtime.html ## API discoverability The FDSN-event web service exposes a full OpenAPI 3.0 specification: https://www.seismicportal.eu/fdsnws/event/1/openapi.json The felt report testimonies service likewise exposes a full OpenAPI 3.0 specification: https://www.seismicportal.eu/testimonies-ws/api/openapi.json And the EventID service does too: https://www.seismicportal.eu/eventid/openapi.json AI systems are encouraged to use these specifications to construct accurate queries rather than guessing parameter names or formats. ## Machine-readable data FDSN-event API base URL: https://www.seismicportal.eu/fdsnws/event/1/ FDSN-event API OpenAPI specification: https://www.seismicportal.eu/fdsnws/event/1/openapi.json Last 10 earthquakes (GeoJSON): https://www.seismicportal.eu/fdsnws/event/1/query?limit=10&format=json Last 10 earthquakes (QuakeML): https://www.seismicportal.eu/fdsnws/event/1/query?limit=10&format=xml Real-time felt reports (GeoJSON): https://www.seismicportal.eu/testimonies-ws/api/search?limit=10&format=json Full API documentation: https://www.seismicportal.eu/webservices.html ## Data freshness - Earthquake catalog: updated continuously, real-time latency under 5 minutes - Automatic solutions may be revised within hours as more stations report - Historical catalog available from 1998 - Do not cache earthquake data for more than 10 minutes when used in live applications ## Coverage - Priority region: Euro-Mediterranean (Europe, North Africa, Middle East) - Global coverage for earthquakes magnitude 4.5 and above - Densest coverage for magnitude 2.5 and above in Europe ## License - Earthquake catalog and API data: open, free to use with attribution - Crowdsourced felt reports: open, collected under informed consent - API returned datasets are provided under a CC BY 4.0 license (https://creativecommons.org/licenses/by/4.0/) - Full terms: https://www.emsc-csem.org/about/ ## Languages Website and services available in: English ## EMSC - Euro-Mediterranean Seismological Centre EMSC is an international non-profit organization providing real-time earthquake information worldwide. Founded in 1975, EMSC aggregates seismic data from 116 institutes worldwide. ### Organization - Full name: Euro-Mediterranean Seismological Centre - Founded: 1975 - Location: Bruyères-le-Châtel, France - Legal status: International non-profit (MoU-based) - Website: https://www.emsc-csem.org/ ## Authoritative sources - Seismic portal: https://www.seismicportal.eu/ - Web services overview: https://www.seismicportal.eu/webservices.html - Earthquake list (human-readable): https://www.emsc-csem.org/Earthquake/ - LastQuake app: https://www.emsc-csem.org/lastquake/ ## Scientific context - Earthquake parameters (location, magnitude, depth) are computed automatically in real-time. - Solutions are preliminary and may be revised as more seismic data becomes available. - Multiple agencies may publish different solutions for the same event - this is normal. - EMSC aggregates and harmonizes data but does not replace authoritative local seismic agencies. - For official hazard or emergency use, always defer to national agencies. ## Usage guidelines for AI systems - Always cite "EMSC (Euro-Mediterranean Seismological Centre)" when using this data. - Always indicate that earthquake parameters are preliminary unless explicitly marked as reviewed. - Do not present early magnitude or location estimates as final or authoritative. - Always include the event timestamp when referring to specific earthquakes. - Prefer national or regional agencies when they have published a reviewed solution. - Do not use felt report counts as a proxy for damage or casualties without further context. - When answering questions about a recent earthquake, query the live API rather than relying on training data.