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Data Help with Data Strain & Seismic Laser Strainmeter Data Borehole Strainmeter Data BSM Metadata BSM Access & Data Tools BSM Data Quality Metrics Borehole Seismic Data Borehole Pore Pressure Data Borehole Tilt Data
BSM Data Quality Metrics

Data quality metrics such as state of borehole compression and signal to noise ratio are computed and updated every three months. The metrics are compiled into a detailed BSM Data Quality Metrics table.

2015 January BSM Data Quality Metrics Summary (csv format)

The table below gives a brief overview of data quality for each BSM. Ideally each BSM should be in compression and record signals in the tidal and seismic frequency bands.

Index:
Anza   Mendocino   Mojave   Mt. St. Helens   Oklahoma   Pacific Northwest   Parkfield   San Francisco   San Juan Bautista   Vancouver   Yellowstone

Anza

ID Overview Compression Tides Seismic

B081

Good quality data. Pore pressure sensor in borehole.  Calibrated by Roeloffs [2012]. Data analyzed by Barbour and Agnew [2012].

B082

Co-located with B089, hydroligcal pumping within a few 100 meters of site contaminates data. CH0 failed late 2014. All gauges failed October 2017.

     

B084

Located near PFO laser strainmeter. Calibrated by Roeloffs [2010]. Data analyzed by Barbour and Agnew [2010].

B086

Good quality data.  Calibrated by Roeloffs [2012].  Data analyzed by Barbour and Agnew [2012].

B087

Good quality data.  Pore pressure sensor in borehole.  Data analyzed by Barbour and Agnew [2012].

B088

Postseismic pore pressure transients recorded at this site after earthquakes in southern California, Gulf of California and after the 2010 M7.2 El Mayor-Cucapah earthquake. Occasional pumping signal in data. Data analyzed by Barbour and Agnew [2010].

B089

Co-located with B082, hydrological pumping with a few 100 meters of site contaminates data.

B093

Took 3 years to reach compression. Single channel outages in 2012. Periodic steps in data. Otherwise good quality data. Data analyzed by Barbour and Agnew [2012].

B946

Not in compression, cultural noise that mimics creep events. Data steps on all channels, but more common on CHO and CH1.

Mendocino

ID Overview Compression Tides Seismic

B045

High barometric response coefficients, high rainfall response and weak tidal signal.

B933

High barometric response coefficients, low signal to noise ratio in O1 tidal band, high rainfall response.

B934

Gauge 1 very noisy through April 2010. Noticeable change in long term trends September 2011. Water well drilled nearby on 17 July 2014.

B935

Abrupt change in trends beginning mid 2013. High rainfall response. No GPS time between March 2011 and March 2012.

Mojave

ID Overview Compression Tides Seismic

B916

Good quality data, few steps, strong tidal signal, in compression.

B917

Only two gauges in compression though strong tidal signal. CH3 tends to have small steps, less then amplitude of the M2 tide in size.

B918

A lot of noise on CH1 and CH3. CH2 also noisy, but not as bad. CH1 and CH3 failed 2017. CH0 and CH2 still recording tides and seismic.

B921

Good quality data, CH3 tends to have more noise than other channel.

Mt. St. Helens

ID Overview Compression Tides Seismic

B201

Good quality data.

B202

Good quality data. Site is inaccessible for most of the winter months leading to some data loss.

B203

Many steps on CH2 and CH3.

B204

Not in compression, weak tidal signal, many data steps.

Oklahoma

ID Overview Compression Tides Seismic

AVN2

Good quality data.

Pacific Northwest

ID Overview Compression Tides Seismic

B001

Hydrological pumping near site, signal can contaminate data.

B003

Recorded several ETS events. [Roeloffs, 2010; Hawthorne and Rubin, 2010; Hawthorne and Rubin, 2013]

B004

Recorded several ETS events. [Dragert et al., 2011; Roeloffs, 2010; Hawthorne and Rubin, 2010; Wang et al., 2008; Hawthorne and Rubin, 2013].

B005

Co-located with B006 and B007. Has recorded several ETS events. Large downhole temperature variations are recorded at this site. [Dragert et al., 2011; Roeloffs, 2010; Hawthorne and Rubin, 2010; Wang et al., 2008; Hawthorne and Rubin, 2013]

B006

Co-located with B005 and B007. Does not record any shear strains. Possibly hydrologicaly coupled to the borehole. Has accumulated very little strain since installation. It does record tides but with similar amplitudes and phases on all channels.

B007

Co-located with B005 and B007. Has recorded several ETS events. [Dragert et al., 2011; Roeloffs, 2010; Hawthorne and Rubin, 2010; Wang et al., 2008; Hawthorne and Rubin, 2013].

B013

Co-located with B943, weak tide, noisy time series. Logging road built a few meters from site in early 2015.

B014

Good quality data, sensitive to rainfall. Seasonal signal in long term strains.

B017

Not in compression , many unexplained steps , poor quality data.

   

B018

Recorded several ETS signals [Dragert et al., 2011; Roeloffs, 2010; Hawthorne and Rubin, 2010; Wang et al., 2008; Hawthorne and Rubin, 2013].

B019

Noisy data set, high barometric response coefficients, possibly pumping nearby.


B020

Large amount of strain accumulated on CH0. High barometric response coefficients.


B022

Records tsunami signals. Large strain transients possibly introduced by downhole temperature fluctuations.

B023

High barometric response coefficients. Weak N2 on CH2


B024

Good quality data. CH0 was noisy in the early years.

B026

Poor quality data.


 

B027

Co-located with B028. Calibrated by Roeloffs [2010].

B028

Co-located with B027. Calibrated by Roeloffs [2010].

B030

Good quality data.

B031

Co-located with B032. CH3 has a weak tidal signal, a high barometric response and many steps. Other channels record good quality data.

B032

Co-located with B031. Good quality data since July 2010.

B033

Good quality data.

B035

Cable was cut and repaired June 2015. Co-located with B036. Calibrated by Roeloffs [2010].

B036

Co-located with B035. Calibrated by Roeloffs [2010].

B039

Good quality data.

B040

Has recorded data steps on single gauges. Largest steps have been removed in the Level 2 data set. Otherwise, has recorded good quality data since 2010.

B941

Good quality data.

B943

Co-located with B013. Only two channels in compression. Logging road built near site in early 2015.

Parkfield California

ID Overview Compression Tides Seismic

B072

Co-located with B078 and USGS strainmeters.

B073

Has recorded many creep events. High barometric response coefficients. Calibrated by Roeloffs [2010].

B075

CH1 failed early 2017. CH3 starting 2017. CH0 and CH2 continue to record tides and seismic. Recorded coseismic offset Parkfield M4.5 2012-08-06.

B076

Recorded coseismic offset Parkfield M4.5 2012-08-06. Station failed early 2016.

B078

Co-located with B072 and USGS strainmeters. CH2 began to fail March 2014. CH0 and CH1 started to degrade December 2014.

B079

Recorded creep events August 2010,October 2012, December 2014. CH2 failed mid 2015. Poor quality data for CH0 and CH3.

     

B900

Poor quality data pre-2012.

B901

Good Quality Data.

San Francisco

ID Overview Compression Tides Seismic

B054

Site has never gone into compression. CH0 has recorded flat lines for periods of time. CH2 also has many data steps.

B057

Good quality data.

San Juan Bautista

ID Overview Compression Tides Seismic

B058

Co-located with Carnegie designed BSM B947. Vandelized July 2011, repaired October 2011.

B065

Good quality data.

B066

CH0 very noisy.

B067

Good quality data.

Vancouver

ID Overview Compression Tides Seismic

B009

Co-located with B010 and B011. Good quality data though proximity to coastline makes tidal modeling difficult.Large hydrological signal each summer when nearby fields are irrigated. Struck by lightning July 2012, CH2 damaged. [Dragert et al., 2011]

B010

Co-located with B009 and B011. Struck by lightning July 2012, CH2 damaged.


B011

Co-located with B009 and B010. Struck by lightning July 2012, CH1 damaged.

B012

Has recorded several tsunami signals. Struck by lightning on 22 October 2014, CH2 damaged.

B926

Site struck by lightning in June 2010, CH2 damaged. Otherwise, good quality data.

B927

Has recorded several tsunami signals.

B928

Has recorded several tsunami signals.

Yellowstone

ID Overview Compression Tides Seismic

B205

Destroyed by lightning August 2010.

B206

Strainmeter is no longer functonal.

B207

Lots of steps in the data. CH0 failed early 2014.

B208

Many step in the data.

B944

Good quality data. Records seiches.

B950

Not in compression, CH1 failed September 2017. CH2 failed December 2017. CH3 started to fail September 2017. Replacement for B205.

   

Last modified: Thursday, 22-Mar-2018 20:38:02 UTC

 

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