Map of California & Nevada earthquakes

MOBB - Monterey Bay Ocean Bottom, CA, USA

ROV being deployed to MOBB

2002/04/10 18:43:00 - Present Latitude: 36.6906 Longitude: -122.1660 Elevation: -1036.50 meters

Filling the MOBB seismometer with glass beads (c)2002 MBARI

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

Location:

Site is located on the Monterey Bay ocean floor, Monterey, CA. The station is operated as a collaborative effort with Monterey Bay Aquarium Research Institute (MBARI). As of 2/27/09, there is an umbilical connecting MOBB to the MARS research node. Data is sent from the node to MBARI via the MARS cable and is then sent back to the Berkeley Seismological Laboratory through the Internet in real time.

• Monterey Ocean Bottom Broadband (MOBB) Project
• Seismo blog entries on the MOBB installation
• Catching Seismic Waves Underwater
• Technological Marvels
• An Umbilical From The Abyss

Geology:

Vault/Borehole conditions:

Instrumentation:

Sensor	Datalogger	Start Date	End Date	SEED Channels	Location
Guralp CMG-1T Triaxial Seismometer	DM24	2009/02/26	Present	BH?	00
12V Monitor	Q330	2009/02/26	Present	LE?	10
BufferUsage	Q330	2009/02/26	Present	VF?	10
ClockPhase	Q330	2009/02/26	Present	LC?	10
ClockQuality	Q330	2009/02/26	Present	LC?	10
Deep-Sea Differential Pressure Gauge	Q330	2009/02/26	Present	LD?	10
InputVoltage	Q330	2009/02/26	Present	VE?	10
SystemCurrent	Q330	2009/02/26	Present	VE?	10
SystemTemperature	Q330	2009/02/26	Present	VK?	10
VCOValue	Q330	2009/02/26	Present	VC?	10
Falmouth Scientific Inc. 2D Acoustic Current Meter	FSI2DACM	2009/02/26	Present	LO?	20

Previous Instrumentation

Network:

BK (Berkeley Digital Seismic Network)

Operation Notes: (may not be current)

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

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.