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NSMP STATIONS
Currently Active Stations
Click here to download an Excel version of the currently active Station List. (updated 10/02/2012). This is a large spreadsheet. Users might experience difficulty if using a browser to open the file. Downloading the file directly to a disk (right click on link and then "save target as") usually works better.The precision of the station latitude and longitude varies depending on the method used to obtain the coordinates (i.e. topographic map, GPS, differential GPS, Google Earth).
NSMP Google Earth Station Map (
updated 08/13/2012) In Google Earth, place cursor on icon to get station code and left-mouse-click on icon to get popup with station information and photo.(requires Google Earth, earth.google.com/)
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The NSMP currently operates over 1,000 strong-motion devices at over 700 permanent stations located in 33 States and the Caribbean (distribution of strong-motion stations by state; updated 07/02/2012). Recorders are currently installed at approximately 684 structures, which includes 604 buildings, 18 bridges and over crossings, and 69 dams. Over 70 instrumented buildings have 6 or more seismic sensors and over 10 have 36 or more seismic sensors (ex: Los Angeles, San Francisco Bay Region). The NSMP is primarily the result of cooperative efforts with many other federal, state, and local agencies, private companies, and academic institutions (LIST; updated 07/02/2012). Key participants for which the NSMP presently maintains instrumentation include the U.S. Army Corps of Engineers, the U.S. Department of Veterans Affairs, and the Metropolitan Water District of Southern California.
Instrumentation is currently comprised of approximately 90% digital recorders (distribution of strong-motion instruments by type; updated 07/02/2012). The NSMP has over 900 digital recorders, located primarily in California, Hawaii, Puerto Rico, and the Pacific northwest. Instrumentation is similar to the analog recorders but records in solid state or flash-card memory rather than on film; operates in a triggered mode but contains a pre-event memory; and provides timing via a GPS receiver. Ground stations may contain 3-6 channels while structure stations may contain 12-72 remote channels. The 106 analog ground stations generally contain Kinemetrics, Inc. optical-mechanical model SMA-1 recorders with internal triaxial force-balance accelerometers.
Five hundred seventy-nine digital recorders (477 dial-up and 102 real-time; total updated 07/03/2012) are hooked up to telephone or internet connections for rapid retrieval and interpretation of on-scale (strong-motion) measurements in urbanized areas for near-real time damage assessments and emergency response evaluation and deployment. The NSMP Near-Real-Time Acquisition System has been in operation since 1999.
The NSMP General Earthquake Observation System (GEOS) project maintains 95 high-fidelity, wide-dynamic range recorders for operation of arrays and for critical post earthquake response studies. Tables of station locations, event locations, ordered arrival lists, and trigger are available via the GEOS Home Page.
This page was last modified on 10/03/2012.
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