Map
of California & Nevada earthquakes
MIN - Mt. Lassen Park Hdqts, Mineral, CA, USA
View of Mt. Lassen |
1993/03/19 19:46:00 - 1999/12/08 18:10:00
Latitude: 40.3460
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Typical STS-1 installation |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
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Site is located in Lassen Volcanic
National Park, Mineral, California. The instruments were relocated
to station MOD in late 1999 due to increasing noise.
The MIN site was first occupied in 1938, with the installation of Wood-Anderson seismographs.
- Geology:
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Pliocene Volcanic Debris
- Vault/Borehole conditions:
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The instruments are sited in a wooden frame
building constructed as a WPA project (circa 1935) for
the installation of Wood-Anderson torsion
seismometers. The hillside building is partially
underground and unheated. The concrete pier is
located in the same room as the datalogger and
supporting equipment. The seismometers are thermally
insulated with 4" of polyurethane foam.
The instruments are sited in a wooden frame building constructed as a WPA project (circa 1935) for the installation of Wood-Anderson torsion seismometers. The hillside building is partially underground and unheated. The concrete pier is located in the same room as the datalogger and supporting equipment. The seismometers are thermally insulated with 4" of polyurethane foam.
- Instrumentation:
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Sensor Datalogger Start Date End Date SEED Channels Location Kinemetrics FBA-23 Accel. (2 g max 1.25 v/g) Q935 1993/03/19 1999/12/08 HL?,LL?,BL? Streckeisen STS-1 VBB Feedback Seismometer Q935 1993/03/19 1999/12/08 VH?,BH?,HH?,UH?,LH? - Network:
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BK (Berkeley Digital Seismic Network)
- Operation Notes: (may not be current)
- This section summarizes major changes in equipment or in instrumentation at MIN.
- 12/08/1999: Station closed.
- 07/16/1999: QTS1 GPS clock replaced with QTS2 GPS1 clock.
- 12/14/1997: Q980 software updated to newer version of USHEAR.
- 02/07/1996: Replaced EW STS-1
- 05/15/1995: Q980 software upgraded to USHEAR.
- 01/16/1994: Wood-Anderson seismometers removed.
- 05/24/1993: Replaced Z STS-1.
- 03/19/1993: Installed Streckeisen STS-1 and a Kinemetrics FBA-23 with a Quanterra Q980 digitizer.
- Noise Characteristics:
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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
- Instrument Response
- 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
- Requesting data
Help on using these tools is available.
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Berkeley Seismological Lab
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Copyright 1995-2005, The Regents of the University of California.
Last modified: Wed Jun 25 13:34:08 PDT 2008