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California Institute of Technology

SCEDC FDSN Web Services

The Southern California Earthquake Data Center, operated by the Caltech Seismological Laboratory, exposes FDSN-standard seismic web services — fdsnws-event, fdsnws-station and fdsnws-dataselect. Verified live 2026-08-19 with real queries returning SCEDC catalog earthquakes and CI-network station metadata, plus verified 204 no-data and structured 400 error behaviour. The best-versioned surface in Caltech's estate.

Documentation Provider Profile APIs.io OpenAPI GitHub

SCEDC FDSN Web Services is one of 11 APIs that California Institute of Technology publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

Tagged areas include Seismology, Earthquakes, FDSN, Open Data, and Research Data. The published artifact set on APIs.io includes an OpenAPI specification, sample payloads, and API documentation.

This API exposes 7 operations across 7 paths, organized into 3 resource areas. It is described by OpenAPI 3.1.0, at version 1.1.1.

Requests are made against a single base URL, https://service.scedc.caltech.edu/fdsnws.

7 operations 7 paths 0 schemas 7 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.1.0
API Version
1.1.1
Base URL
https://service.scedc.caltech.edu/fdsnws
Contact
Southern California Earthquake Data Center, Caltech Seismological Laboratory
Resource Areas
3

Paths & Operations 7

Across 7 paths, the API surfaces 7 operations — 7 GET. They span 3 resource areas: Event, Station, DataSelect. Each is listed below with its method, path, parameters, and response codes.

Event 2

Earthquake event catalog queries (fdsnws-event).

GET
/event/1/version
Service version for fdsnws-event
getEventServiceVersion → 200
GET
/event/1/query
Query the earthquake event catalog
queryEvents 5 params → 200204400
Station 2

Station and channel metadata queries (fdsnws-station).

GET
/station/1/version
Service version for fdsnws-station
getStationServiceVersion → 200
GET
/station/1/query
Query station and channel metadata
queryStations 5 params → 200204400
DataSelect 3

Time-series waveform retrieval (fdsnws-dataselect).

GET
/dataselect/1/version
Service version for fdsnws-dataselect
getDataSelectServiceVersion → 200
GET
/dataselect/1/application.wadl
WADL description of fdsnws-dataselect
getDataSelectWadl → 200
GET
/dataselect/1/query
Retrieve time-series waveform data
queryWaveforms 6 params → 200204400

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

caltech-scedc-fdsn-openapi.yml Raw ↑

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#Seismology#Earthquakes#FDSN#Open Data#Research Data#Time Series
← Back to S APIs
API Details
ID
caltech:scedc-fdsn
Base URL
https://service.scedc.caltech.edu/fdsnws
Docs
https://scedc.caltech.edu/
Provider
California Institute of Technology
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