Strain & Seismic Data

The NOTA strainmeter network includes long-baseline above-ground laser strainmeters (LSMs) and Gladwin Tensor borehole strainmeters (BSMs). LSM and BSM data at at 1-Hz rate while BSMs also record at 20-Hz rate and at 10 minute intervals. Raw strain data are available in MiniSEED format from the NGF archive via the FDSN DataSelect service, while processed data are available in XML and ASCII format from the NGF archive.

Borehole

• Get BSM Data
  Borehole Strainmeter Data (BSM) are from over 70 Gladwin Tensor four-component deep-borehole tensor BSMs grouted in borehole casings at depths of up to 250 meters.
• Get Seismic Data
  Borehole Seismic data are collected by short-period, deep-borehole seismometers, most of which are co-located with borehole strainmeters.
• Get Pore Pressure Data
  Borehole Pore Pressure data at a 1-Hz sampling rate is available in ASCII-format files; there are no processed data products because the raw data can be used by users without modification.
• Get Tilt Data
  Borehole Tilt data are collected by shallow-borehole tiltmeters, co-located with GPS or borehole strainmeter and seismic stations.
• Get Creep Data
  Creep Data are from ~35 creepmeters located in California and Turkey.

Laser Strainmeter

• Get LSM Data
  Laser Strainmeter Data are from six above-ground, long-baseline laser strainmeters (LSMs) with baselines about 450 m in length.