Southern California Earthquake Data Center

The SCEDC Waveform AWS Public Dataset

The SCEDC archives and distributes continuous ground velocity and acceleration waveforms recorded by the Southern California Seismic Network (SCSN). Currently the SCSN records over 540 stations in the Southern California region. We are pleased to announce that these holdings are now also part of the AWS Public Dataset program. Continuous archive begins in 1999 with 1-20 sps broadband sensor recordings. Continuous archive of 100 sps broadband begins in 2008. Upload of strong motion and short period data is in progress.


Data Structure

    AWS Bucket Name and Region: s3://scedc-pds; us-west-2


        Data organization:
        • Each file is one day, starting 00:00:00 UTC. A single channel is uniquely represented by a network code, station code, channel code, location code. See "References" section below for more information on these codes.
        • Each file has key names for the year (4 digit) and the day of the year (3 digit). (ex: 2017/2017_010/
      • The data may contain gaps.
        File naming convention: [Network code][Station code][Channel code][Location code]_[year][day of year].ms
        (ex:, where:
        • [Network code] = 2 letter SEED network code
        • [Station code] = 5 letter SEED station code
        • [Channel code] = 3 letter SEED channel code
        • [Location code] = 2 letter SEED location code
        • [year] = 4 digit year
        • [day of the year] = 3 digit day of the year (aka ordinal date)
        File format: miniSEED


        Metadata Structure

          Data organization:
          • Each file contains metadata for a single station for all epochs. Key names are "FDSNstationXML" and the network code "CI". (ex: FDSNstationXML/CI/CI_GSC.xml)
          • Only CI network stations are hosted in the public dataset. Please see the authoritative network for stations that do not have a CI network code.
          File naming convention: [Network code]_[Station code].xml
          (ex: CI_GSC xml,CI_PASC.xml)
          File format: FDSN StationXML



    • Southern California Seismic Network Description of the network, its reporting region and typical station installations
    • Description of miniSEED and SEED Formats from IRIS website. Includes standards for network, station, channel, location codes.
    • Description of FDSN StationXML from FDSN (International Federation of Digital Seismograph Networks) website
    • List of FDSN Networks from FDSN (International Federation of Digital Seismograph Networks) website