Strain and other geophysical data
Geophysical data such as strain, creep, tilt, and water level from several networks or projects are archived at the NCEDC. Because the diversity of these experiments is large, they are listed by network, rather than by data type.
- USGS Fault Monitoring Network
The USGS has collected a diverse set of geophysical data over the last 25 years. The low-frequency geophysical data includes over 1300 channels of strain, creep, magnetic field, tilt, well water level, differential lake level, electric field, pore pressure and associated environmental measurements such as rainfall, barometric pressure, wind speed, snow depth and crustal temperature at various depths.
- Berkeley Digital Seismic Network
Most stations of the BDSN include pressure and temperature sensors, in addition to the seismic channels. The station BRIB also includes a dilatometer strainmeter. The stations of the "mini-Plate Boundary Observatory" project, which is part of the BDSN, are integrated observatories with tensor strainmeters, tiltmeters, pore-pressure sensors, seismometers, and GPS receivers.
In addition to these observatories, the BDSN collects data from the Parkfield-Hollister electro-magnetic experiment. This experiment consists of two sites with electric and magnetic field sensors and a third site with electric field sensors. Magnetic activity and Shumann resonance parameters are calculated from these data on a regular basis.
- Plate Boundary Observatory Network
As part of Earthscope, the Plate Boundary Observatory project is installing borehole and laser strainmeters in the western United States. Data from these instruments and other evironmental sensors will be available through the NCEDC as the stations are installed.