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125 Years of Sound Science, serving society

ARC - Humboldt State University, Arcata, CA, USA

Station Name ARC
In Operation 1992/05/28 19:48:00 - 2001/08/02 00:36:00
Elevation: 30.10 meters
Instrumentation Broadband

  • Site


    ARC was located on the campus of Humboldt State University, in cooperation with the Geology Department. The site was established in 1948 with the installation of Sprengnether sensors. Wood-Anderson seismographs were installed in 1952 and operated until 1993. The digital broadband equipment was installed in 1992.

    The site was relocated in 2001 to station JCC.


    BK (Berkeley Digital Seismic Network)


    Quaternary Sandstone

    Vault/Borehole Conditions

    The instruments are sited on the ground floor of Founders Hall at Humboldt State University. The digital instrumentation is located on the same concrete pier as the Wood-Anderson seismometers, in a room at the northwest corner, which is isolated from the hallway via two doors. The seismometers are thermally insulated with 4" of polyurethane foam. An adjoining room contains the datalogger and supporting equipment.
  • Plots & Figures


    Founders Hall, HSU

    Founders Hall, HSU

    Typical STS-2 installation

    Typical STS-2 installation

  • Instrumentation

    Table of Seismic Instrumentation

    SensorDataloggerSEED ChannelsLocation
    BroadbandStreckeisen STS-2 VBB Tri-Axial SeismometerQ935BH?,HH?,LH?,UH?,VH?
    AccelerometerKinemetrics FBA-23 Accel. (2 g max 1.25 v/g)Q935BL?,HL?,LL?
    AuxiliaryBattery VoltageQ935LE?,UE?
    Internal TemperatureQ935UK?
  • Data & Metadata
  • Data Quality

    Noise Analysis

    View more noise plots