Map
of California & Nevada earthquakes
Overview of the Hayward Fault Network
Station Information | Data access | Reports | Collaborations
The Northern Hayward Fault Network (NHFN) is one of several networks of seismic instrumentation in northern and central California operated by the Berkeley Seismological Laboratory. The NHFN is an array of borehole instrumentation deployed in the San Francisco Bay Area, with the goal of monitoring microseismicity on the Hayward fault. Data from these stations are transmitted to UC Berkeley using continuous telemetry and are analyzed for earthquakes. 7 sites are currently operational and additional stations are planned.
- Network Code
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BK
(also includes the
BDSN,
MPBO, and
MOBB)
- Typical Station Equipment
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3-component Oyo 4.5 Hz geophones
3-component Wilcoxon accelerometers
24-bit Quanterra digital data logger
GPS clock
Continuous telemetry to UC Berkeley
160 hour backup power supply - Typical Recorded Channels
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Sensor SEED Channels Rate (samples/sec) Sampling Mode FIR Filter Geophone EP1, EP2, EP3 100.0 Triggered Causal Geophone DP1, DP2, DP3? 500.0 Triggered Causal Accelerometer LL1, LL2, LL3 1.0 Continuous Acausal Accelerometer BL1, BL2, BL3 20.0 Continuous Acausal Accelerometer HL1, HL2, HL3 100.0 Continuous Causal Accelerometer CL1, CL2, CL3 500.0 Triggered Causal Normally, only 3 channels of acceleration and the vertical component geophone are recorded and archived. In some cases, sensor failure has led to different recording combinations.
- Network State of Health
-
No information at this time.
- Station and Channel Information
-
- Map of NHFN stations
- Table of NHFN stations
- BK Information Directory, including
- List of station locations
- List of available channels
- Instrument Response
- Information on Quanterra Timing Errors
- Data access
-
Waveform data from the BK network are available in
SEED format at the
Northern California Earthquake
Data Center.
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.
- Reports and Publications
-
- Reports on the NHFN from the Annual Report of the BSL:
- Collaborations
- The NHFN has been developed by the Berkeley Seismological Laboratory in collaboration with:
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Berkeley Seismological Lab
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Copyright 1995-2005, The Regents of the University of California.
Last modified: Tue Feb 5 14:24:04 PST 2008