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PACP - Pacheco Peak, CA, USA |
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View of Pacheco Peak |
2003/06/19 15:00:00 - Present
Latitude: 37.0080
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STS-2 & Episensor in PACP vault |
Location |
Geology |
Vault Conditions
Instrumentation |
Network |
Operation Notes
Noise Characteristics |
Data Availability
- Location:
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PACP is installed at Pacheco Peak in south
Santa Clara County. The site was established
under the auspices of the
CA Department of
Forestry and Fire Protection and
Santa Clara County. The
mountain top site has two existing concrete radio
vaults and 30 meter antenna towers. Police, fire,
and state, and county communication equipment are
housed there.
Support for PACP was provided by the Governor's Office of Emergency Services as part of the California Integrated Seismic Network.
- Geology:
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Miocene Volcanic Andesite
- Vault/Borehole conditions:
-
The PACP vault is a surface installation, constructed
on bedrock outcrops on Pacheco Peak. The pier is
surrounded by concrete bricks and 4" of insulation.
The entire vault is then surrounded and topped by bags of
concrete mix.
- Instrumentation:
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Sensor Datalogger Start Date End Date SEED Channels Location AntennaCurrent Q330HR-GFE 2010/04/19 Present VE? 00 ClockPhase Q330HR-GFE 2010/04/19 Present LC?,VC? 00 ClockQuality Q330HR-GFE 2010/04/19 Present LC?,VC? 00 InputVoltage Q330HR-GFE 2010/04/19 Present VE? 00 Kinemetrics FBA ES-T Accel. (2 g max 10 v/g) Q330HR-GFE 2010/04/19 Present HN? 00 Streckeisen STS-2 VBB Tri-Axial Seismometer Q330HR-GFE 2010/04/19 Present BH?,HH?,LH?,VH? 00 SystemCurrent Q330HR-GFE 2010/04/19 Present VE? 00 SystemTemperature Q330HR-GFE 2010/04/19 Present VK? 00 VCOValue Q330HR-GFE 2010/04/19 Present VC? 00 - 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 PACP.
- 2004/06/15: Changed BH channels from 20 Hz to 40 Hz sampling rate.
- 2003/09/11: Seismometers relocated to new pier.
- 2003/07/01: Changed HH channels to have causal filters.
- 2003/06/19: Equipment installed temporarily in the Santa Clara County communications facility while the vault is prepared.
- 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 by channel and time
- Requesting data by event
Help on using these tools is available.
