KNMI earthquakes

Base URL

https://api.dataplatform.knmi.nl/fdsnws

Endpoints 10

• GET/event/1/querySearch events by time, box or radius, depth, magnitude and type. QuakeML by default; format=text or json for a table or GeoJSON.
• GET/event/1/query?eventid={id}One event in detail (all magnitudes, origin, picks); id such as knmi2012qcdh (Huizinge).
• GET/event/1/versionService version (1.2.9 on 16 Oct 2026).
• GET/event/1/application.wadlMachine-readable list of parameters.
• GET/event/1/catalogs/Catalogues (KNMI only); mind the trailing slash, without it you get a 301.
• GET/event/1/contributors/Contributors (KNMI only).
• GET/station/1/queryNetworks and stations (level=network|station|channel|response): NL 903 stations since 1993, NA (Caribbean Netherlands) 12.
• GET/dataselect/1/queryWaveforms (miniSEED) per network, station, channel and time window.
• GET/shakemaps/7/listAll ShakeMaps with their files (66 earthquakes, 56 with grid.nc).
• GET/shakemaps/7/download/{eventid}/{bestand}One ShakeMap file: rrsm.json/rrsm.csv (acceleration per station), grid.nc (grid), event.xml.

Filtering platform

No query language: each condition is its own query parameter (FDSN). Combinations act as AND.

Parameters 13

Columns with format=text (json has the same data as GeoJSON properties) 9

Limits and pitfalls

• No documented limit; the whole catalogue (6,514 lines) comes in one text response of ~0.6 MB. tested
• /event/1/count (optional in FDSN) does not exist here: 404. Count the lines of format=text yourself. tested
• Nothing found returns HTTP 204 with no body, not an empty list. A JSON parser chokes on that; handle 204 or use nodata=404. tested
• The catalogue is not just the Netherlands: without a box you also get Caribbean Netherlands and beyond (orderby=magnitude returned a quake near the Leeward Islands); with a box also the Ruhr and Belgium. tested
• The catalog parameter does not work (according to the KNMI help page, not available in SeisComP). from the description
• format=text has numbers with many decimals (Magnitude 1.5031251973028663, coordinates 53.46530151367188): round them yourself. tested
• An error (400, 404) is plain text with the line 'Usage details are available from …', not JSON. tested

Try it HTTP 200 · 459 ms · 16 Oct

https://api.dataplatform.knmi.nl/fdsnws/event/1/query?starttime=2026-01-01&minlatitude=50.7&maxlatitude=53.7&minlongitude=3.2&maxlongitude=7.3&eventtype=induced or triggered event&limit=5&format=json

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "id": "knmi2026qmut",
      "properties": {
        "time": "2026-08-21T03:50:39.0000",
        "lat": 53.378,
        "lon": 6.667,
        "depth": 3,
        "mag": 2.75655436993489,
        "mag_type": "MLn",
        "catalog": null,
        "contributor": "KNMI",
        "location": "Zandeweer",
        "event_type": "induced or triggered event",
        "status": "reviewed",
        "mode": "manual"
      },
      "geometry": {
        "type": "Point",
        "coordinates": "…"
      }
    },
    {
      "type": "Feature",
      "id": "knmi2026pdho",
      "properties": {
        "time": "2026-08-01T22:26:50.399999",
        "lat": 53.117,
        "lon": 6.951,
        "depth": 3,
        "mag": 1.440433077332287,
        "mag_type": "MLn",
        "catalog": null,
        "contributor": "KNMI",
        "location": "Veendam",
        "event_type": "induced or triggered event",
        "status": "reviewed",

Shortened response, saved at harvest time. Click the URL for the real, current response.