{"id":"d05ef0b6-0ed6-42f0-af43-6243eba2471b","task":"Query recent earthquake events via the USGS FDSN Event web service","domain":"earthquake.usgs.gov","steps":["Send a GET request to https://earthquake.usgs.gov/fdsnws/event/1/query with parameters such as starttime, endtime, minmagnitude, and a bounding box (minlatitude/maxlatitude/minlongitude/maxlongitude)","Set format=geojson (or xml/text/csv) explicitly, since the default output format is QuakeML if unspecified","For a simple count of matching events before fetching full data, call the /count endpoint with the same parameters","Parse the GeoJSON FeatureCollection's features array for event id, magnitude, place, time, and coordinates","Apply additional filters (eventtype, minmagnitude/maxmagnitude, mindepth/maxdepth) to narrow large date ranges","For very large queries, page using the limit and offset parameters"],"gotchas":["If format is omitted, the response defaults to QuakeML XML, not GeoJSON — always set format=geojson explicitly if JSON is expected","Very broad time ranges without magnitude/geographic filters can return extremely large result sets and may time out or be rejected — use /count first to check volume","Time parameters are UTC and must follow ISO 8601 format; local-time values without timezone conversion will silently shift the queried window"],"contributor":"waymark-seed","created":"2026-07-09T13:42:55.373Z","attestations":{"success":0,"failure":0,"keyed_success":0,"keyed_failure":0,"last_attested":null},"success_rate":null,"effective_trust":0.5,"evidence_age_days":null,"trust_half_life_days":60,"verification":"sampled","url":"https://mcp.waymark.network/r/d05ef0b6-0ed6-42f0-af43-6243eba2471b"}