Map of California & Nevada earthquakes

HELL - Private Property, Miramonte, CA, USA

The vault at HELL. (Photo: H. Rademacher)

2005/04/09 00:00:00 - Present Latitude: 36.6801 Longitude: -119.0228 Elevation: 1140.00 meters

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

Location:

Site is located on private property in the Sierra Nevada foothills east of Fresno, CA.

This station was installed in March 2005 by USArray personnel as a collaboration with the Berkeley Seismological Laboratory, and was part of the USArray component of the Earthscope program. When the Travelling Array left California in 2007, the BSL adopted this station. It has been operating as a BDSN station since March 2008.

Geology:

TBD

Vault/Borehole conditions:

The HELL installation is based on the USArray vault design.

Instrumentation:

Sensor	Datalogger	Start Date	End Date	SEED Channels	Location
AntennaCurrent	Q330	2010/04/20	Present	VE?	00
ClockPhase	Q330	2010/04/20	Present	LC?,VC?	00
ClockQuality	Q330	2010/04/20	Present	LC?,VC?	00
InputVoltage	Q330	2010/04/20	Present	VE?	00
Kinemetrics FBA ES-T Accel. (2 g max 10 v/g)	Q330	2010/04/20	Present	HN?	00
Streckeisen STS-2 VBB Tri-Axial Seismometer	Q330	2010/04/20	Present	BH?,HH?,LH?,VH?	00
SystemCurrent	Q330	2010/04/20	Present	VE?	00
SystemTemperature	Q330	2010/04/20	Present	VK?	00
VCOValue	Q330	2010/04/20	Present	VC?	00

Previous Instrumentation

Network:

TA,BK (US Array and Berkeley Digital Seismic Network)

Operation Notes: (may not be current)

This section summarizes major changes in equipment or in instrumentation at HELL.

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 by channel and time
  • NetDC Request Form
• Requesting data by event
  • EVT_FAST request for NC data

Help on using these tools is available.