BSL logo



MNRC - McLaughlin Mine, CA, USA

View of the MNRC vault at McLaughlin Reserve

View of the MNRC vault at McLaughlin Reserve

2003/06/19 15:00:00 - Present

Latitude: 38.8787
Longitude: -122.4428
Elevation: 709.87 meters

STS-2 and Episensor installation at MNRC

STS-2 and Episensor installation at MNRC

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

Location:
The MNRC site is on property owned and formerly operated by Homestake Mining Company as a surface gold mine. The geology of the area is extremely varied and complex. With the conclusion of mining operations, the property will be managed by UC Davis as the McLaughlin Reserve (part of the University of California Natural Reserve System. The seismographic vault is the first new research project on the reserve. The site is located approximately 20 kilometers east of the town of Lower Lake, California in an area of Franciscan sandstone.

Support for MNRC was provided by the Governor's Office of Emergency Services as part of the California Integrated Seismic Network.

Geology:
Franciscan sandstone

Vault/Borehole conditions:
A steel and concrete vault from a shipping container similar to those found at stations JCC, PKD, and HOPS was constructed. Power and telephone lines were trenched approximately 300 meters to the site. Because of the remoteness of the site, digital telephone data circuits are not available. Telemetry was established in spring 2004 using a radio network that brings the data down to Napa and into the frame-relay network.

Instrumentation:
SensorDataloggerStart DateEnd DateSEED ChannelsLocation
Battery VoltageQ41202003/07/01PresentUE?,LE?
Internal TemperatureQ41202003/07/01PresentUK?
Kinemetrics FBA ES-T Accel. (2 g max 10 v/g)Q41202003/06/19PresentLL?,BL?,HL?
Motorola MPX201 PressureQ41202003/06/19PresentLD?
Streckeisen STS-2 VBB Tri-Axial SeismometerQ41202003/06/19PresentHH?,VH?,LH?,UH?,BH?
Streckeisen STS-2 VBB Tri-Axial SeismometerQ41202003/07/01PresentUM?
YSI 44031 ThermistorQ41202003/06/19PresentLK?

Network:
BK (Berkeley Digital Seismic Network)

Operation Notes: (may not be current)
This section summarizes major changes in equipment or in instrumentation at MNRC.

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
1999 PSD 2000 PSD 2001 PSD 2002 PSD 2003 PSD 2004 PSD 2005 PSD

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

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

Help on using these tools is available.

BDSN Overview | Map | Table



Berkeley Seismological Lab
215 McCone Hall, UC Berkeley
Berkeley CA 94720-4760
www@seismo.berkeley.edu

UC Berkeley seal

Copyright 1995-2005, The Regents of the University of California.
Last modified: Wed Jun 25 13:34:08 PDT 2008