SBRN - San Bruno Mtn., Brisbane, CA, USA

Location

SBRN is located on San Bruno Mountain, under the auspices of the city of Brisbane. This site is known as SFBSB in the USGS Low Frequency Network. 1.25" pipe bolted into borehole casing SBRB replaced retired GPS site SBRN. Monument is drilled and pinned into the roof of a single story concrete structure.

Network

Mini Plate Boundary Observatory Network (BK)
Bay Area Regional Deformation Network Network (BARD)

Geology

Upper Cretaceous, sandstone, shale, and conglomerate

Borehole Conditions

The MiniPBO borehole was installed on 08/06/2001. The strainmeter was installed at 551.5 ft and the seismometer package at 530.0 ft depth. This figure shows the location of equipment in the borehole.

GPS Monument Description

1.25" pipe bolted into borehole casing

Seismic Station Pictures

View of SBRN

No image

GPS Station SBRB Pictures

SBRB

SBRB

Retired GPS Station SBRN Pictures

SBRN

SBRN

GPS Station Timeseries

Time series processing at the BSL *

Last year	Clean	Clean & detrended	Raw	Raw & detrended
Lifetime	Clean	Clean & detrended	Raw	Raw & detrended
Text file (final results only)	Clean		Raw

• USGS Timeseries (GIPSY)
• UNR Timeseries (GIPSY)

*discontinued

Time series processing at the BSL *

Last year	Clean	Clean & detrended	Raw	Raw & detrended
Lifetime	Clean	Clean & detrended	Raw	Raw & detrended
Text file (final results only)	Clean		Raw

We are currently reprocessing older data and full lifetime time series are not yet available. Check back here or send an email to bard@seismo.berkeley.edu for information on older time series.

• USGS Timeseries (GIPSY)
• UNR Timeseries (GIPSY)

*discontinued

Table of Seismic Instrumentation

	Sensor	Datalogger	SEED Channels	Location
Geophone	Mark Products L-22 Horizontal Geophone	Q330-GFE	EP?,LP?,SP?	40
	Mark Products L-22 Vertical Geophone	Q330-GFE	EP?,LP?,SP?	40
	Sensor	Datalogger	SEED Channels	Location
Auxiliary	AntennaCurrent	Q330-GFE	VE?	40
	ClockPhase	Q330-GFE	LC?,VC?	40
	ClockQuality	Q330-GFE	LC?,VC?	40
	InputVoltage	Q330-GFE	VE?	40
	Paroscientific 8WD Digital Pressure Meter	Q330-GFE	LD?	40
	Sacks 3-component Tensor Strainmeter	Q330-GFE	BS?,HS?,LS?	40
	SystemCurrent	Q330-GFE	VE?	40
	SystemTemperature	Q330-GFE	VK?	40
	VCOValue	Q330-GFE	VC?	40
	CalibrationInput	QEP	LC?	EP
	Humidity	QEP	LI?	EP
	Pinnacle5000	QEP	BA?,LA?	EP
	Pressure	QEP	LD?	EP
	Setra Systems Model 270 Barometer	QEP	LD?	EP
	Temperature	QEP	LK?	EP

Waveforms and associated metadata, and GPS data, are available at the Northern California Earthquake Data Center (NCEDC).

Waveform Data

• 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

• Querying the archives
  • SeismiQuery at the NCEDC
• Download waveform data

GPS Data

• Site log: sbrb.log
  
  

  Data Type	From	To
  Low-rate raw	---	---
  Low-rate rinex	08/21/2008	present
  High-rate raw	08/21/2008	present
  High-rate rinex	05/1/2010	present

• Site log: Retired station sbrn.log
  
  

  Data Type	From	To
  Low-rate raw	03/05/2003	10/6/2003
  Low-rate rinex	03/05/2003	04/15/2011
  High-rate raw	10/6/2003	04/15/2011
  High-rate rinex	5/1/2010	04/15/2011

Noise Analysis

View more noise plots

GPS Data Quality

Completeness

Data completeness is defined both as "Completeness of observations" and "Cycle slips per observation". "Completeness of Obs." is the number of epochs in the final RINEX file normalized to the expected number. This percentage will go down if time is missing from the RINEX file. "Cycle slips per Obs." is the total number of detected cycle slip normalized to the total number of observations in the RINEX file. This number will increase as the receiver loses lock on satellites more frequently.

Previous Year

Lifetime

Multipath

The effects of multipath on the data are estimated by parameters for L1 and L2 (MP1 and MP2 respectively); see Estey and Meertens (GPS Solutions, 1999) for derivation. The daily value is the RMS of MP1 and MP2 throughout the day and for all satellites. Higher values indicate a greater prevalence and/or strength of multipathing, i.e. objects on the ground are providing multiple reflection pathways from the satellite to antenna.

Previous Year

Lifetime

Signal-to-Noise Ratio

The Signal-to-Noise ratios are the mean values above the QC elevation mask for L1 and L2 respectively.

Previous Year

Lifetime

Completeness

Data completeness is defined both as "Completeness of observations" and "Cycle slips per observation". "Completeness of Obs." is the number of epochs in the final RINEX file normalized to the expected number. This percentage will go down if time is missing from the RINEX file. "Cycle slips per Obs." is the total number of detected cycle slip normalized to the total number of observations in the RINEX file. This number will increase as the receiver loses lock on satellites more frequently.

Previous Year

Lifetime

Multipath

The effects of multipath on the data are estimated by parameters for L1 and L2 (MP1 and MP2 respectively); see Estey and Meertens (GPS Solutions, 1999) for derivation. The daily value is the RMS of MP1 and MP2 throughout the day and for all satellites. Higher values indicate a greater prevalence and/or strength of multipathing, i.e. objects on the ground are providing multiple reflection pathways from the satellite to antenna.

Previous Year

Lifetime