Over the wide frequency range of seismic waves transmitted through the Earth (hundreds of seconds to ten cycles per second), the sensors of the permanent and transportable arrays must be capable of resolving the smallest background motions at the quietest of sites, while remaining “on-scale” for all but the largest ground motions from regional earthquakes.
USArray Instrument Pages
Flexible Instrument Availability
Flexible Seismic Array Instrument Schedule
A transportable array of 400 portable, unmanned three-component broadband seismometers deployed on a uniform grid that will systematically cover the US.
More Info
For applications in which the flexible array is used for observations of artificial sources (explosions or vibrators) at short ranges, the longer periods (below 1 sec) are not as important, but higher frequencies (up to 100 hz) must be recoverable for high-resolution studies. more ›
Seismic Array Status
Operational Status Report
| Updated: 13 Mar 2010 |
| Instruments Deployed | Most Recent Data | Seismic: | 995 | 2010-02-24 |
Instrumentation Maps
EarthScope map systems display specific stations by instrument type, data latency, or geography.
Seismic Instruments on EIS
