Home

News & Updates

Who we are

Research Activities

Geophysical Networks

Map of California & Nevada earthquakes

More Earthquake Information

Education and Outreach

Annual Report

BSL Directory

Site Index

Search

View of entrance to Wente wine cellars

1997/06/21 01:11:00 - Present Latitude: 37.6221 Longitude: -121.7570 Elevation: 138.90 meters

View down the tunnel

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

Location:

Site is located at the Wente Vineyards sparkling champagne cellars in Livermore, California.

Geology:

Miocene marine

Vault/Borehole conditions:

The sensors are installed on a pier in a winery tunnel. The equipment is set behind a wall separating actively used tunnels from an older, inactive, section.

Instrumentation:

Sensor	Datalogger	Start Date	End Date	SEED Channels	Location
Battery Voltage	Q4120	2003/06/30	Present	LE?,UE?
Internal Temperature	Q4120	2003/06/30	Present	UK?
Kinemetrics FBA ES-T Accel. (2 g max 10 v/g)	Q4120	2004/11/10	Present	LL?,BL?,HL?
Kinemetrics FBA-23 Accel. (2 g max 1.25 v/g)	Q4120	1997/06/21	2004/11/10	LL?,BL?,HL?
Motorola MPX201 Pressure	Q4120	1997/06/21	Present	LD?
Streckeisen STS-2 VBB Tri-Axial Seismometer	Q4120	1997/07/31	Present	BH?,HH?,LH?,UH?,VH?
Streckeisen STS-2 VBB Tri-Axial Seismometer	Q4120	2003/06/30	Present	UM?
YSI 44031 Thermistor	Q4120	1997/06/21	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 WENL.

• 06/15/2004: Changed BH channels sampling rate to 40 Hz.
• 07/01/2003: Changed HH channels to have causal filters.
• 03/06/2000: New MSHEAR software installed to replace older version.
• 12/15/1999: Q980 upgraded to MSHEAR software.
• 07/15/1998: New STS-2 installed, along with original FBA-23 and new pressure/temperature sensors.
• 02/06/1998: STS-2, FBA-23, and pressure/temperature sensors removed due to flooding of tunnel.
• 06/21/1997: Data archival begun.
• 06/18/1997: Streckeisen STS-2 broadband seismometer and Kinemetrics FBA-23 strong-motion accelerometer 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.