SCEDC Web Services

The tables below describe the web services available at the SCEDC. FDSN web services follow the FDSN API - a standard followed by many seismic networks. In addition, many scientific programming frameworks such as ObsPy and MatLab provide libraries that use these APIs.


Service interface Version Summary Return options
station v1.1 metadata for waveform time series archived FDSN StationXML
dataselect v1.1 waveform time series miniSEED
event v1.1 event catalog webservice QuakeML
availability v1.1 waveform and seismi phase availability webservice text


Service interface Version Summary Return options
webstp v1.0 SCEDC earthquake catalog
SCEDC phase data
continuous waveform time series
triggered waveform time series
sacpz v1.0 Poles and zeros of instrument response in SAC ASCII format. SAC
resp v1.0 RESP


Web services can be accessed in a number of different ways:

  • Small requests can be handled through your browser
  • Dedicated clients are available for making more complex or larger queries:
    • IRIS Fetch scripts: Command line scripts for accessing data via web services. SCEDC specific info. and information on using the scripts with other data centers.
    • irisFetch.m: A MATLAB library created by IRIS that allows direct access to data.
    • ObsPy: The ObsPy project is dedicated to providing a Python framework for processing seismological data. Included in this framework is the capability to retrieve data from FDSN web services.
  • Automated or scripted requests can be made using programs such as wget or curl.
    Note: For POST users, there are known issues with wget v1.12 and https. This version does not correctly handle some properties in SSL certificates and may fail with the error ERROR: certificate common name doesn't match requested host name. We recommend upgrading to a higher version of wget or using curl instead.