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View of JCC

2001/04/11 21:27:00 - Present Latitude: 40.8175 Longitude: -124.0296 Elevation: 27.25 meters

STS-2 at JCC

Location | Geology | Vault Conditions
Instrumentation | Network | Operation Notes
Noise Characteristics | Data Availability

Location:

Site is located near Jacoby Creek in northwestern California. It sits in a decommissioned rock quarry on property now belonging to Barnum Timber. JCC is the replacement for station ARC.

Geology:

Quaternary Sandstone

Vault/Borehole conditions:

The sensors are located in an insulated shed built into the base of a hill.

Instrumentation:

Sensor	Datalogger	Start Date	End Date	SEED Channels	Location
Battery Voltage	Q935	2001/06/01	Present	LE?,UE?
Internal Temperature	Q935	2001/06/01	Present	UK?
Kinemetrics FBA ES-T Accel. (2 g max 10 v/g)	Q935	2004/09/02	Present	LL?,BL?,HL?
Kinemetrics FBA-23 Accel. (2 g max 1.25 v/g)	Q935	2001/04/11	2004/09/02	HL?,LL?,BL?
Motorola MPX201 Pressure	Q935	2001/04/11	Present	LD?
Streckeisen STS-2 VBB Tri-Axial Seismometer	Q935	2001/04/11	Present	BH?,HH?,LH?,UH?,VH?
Streckeisen STS-2 VBB Tri-Axial Seismometer	Q935	2001/06/01	Present	UM?
YSI 44031 Thermistor	Q935	2001/04/11	Present	LK?

Network:

BK (Berkeley Digital Seismic Network)

Operation Notes: (may not be current)

This section summarizes major changes in equipment or in instrumentation at JCC.

• 06/15/2004: Changed BH channels sampling rate to 40 Hz.
• 04/12/2001: Instrumentation installed.

Noise Characteristics:

The figures below are cumulative plots of power spectral density (psd) determined from the broadband channels. In each figure, the vertical component psd is plotted with blue diamonds, the north component psd with red squares, and the east component psd with green circles. The results are presented in the 5 different frequency bands, and the USGS/Albuquerque low noise model is plotted as a dashed line in each. The PSD units are in dB (decibel) relative to 1 (m/s**2)**2/Hz. The current annual plot is updated weekly.

Cumulative PSD results
1999	2000	2001	2002	2003	2004	2005

Data Availability:

BDSN waveforms and associated metadata are available at the Northern California Earthquake Data Center (NCEDC).

• Map of BDSN stations
• Table of BDSN stations
• BK Information Directory, including
  • List of station locations
  • List of available channels
    • Year/month/day format
    • Year,doy format
  • Instrument Response
    • SEED format
    • Simplified Responses
• Information on Quanterra Timing Errors
• Information on Quanterra 4120 FIR Filter changes - 6/30/2003
• Information on BH sampling rate change - 06/15/2004
• View digital seismograms

Several tools provide access to SEED format data at the NCEDC, both in terms of querying the archives and allowing data requests.

• Querying the archives
  • SeismiQuery at the NCEDC
  • NetDC Request Form
• Requesting data
  • NetDC Request Form

Help on using these tools is available.