International Federation of Digital Seismograph Networks

NP: United States National Strong-Motion Network

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FDSN Network Information

FDSN code NP Operated by U.S. Geological Survey
Network name United States National Strong-Motion Network (NSMP) Deployment region United States of America
Start year 1931 End year -
Network Website
Short description

The NSMP operates and maintains strong-motion instruments at more than 660 ground, free-field and reference sites, and more than 3200 channels of data from about 180 structural arrays.

Citation Information

Digital Object Identifier (DOI)
U.S. Geological Survey (1931): United States National Strong-Motion Network. International Federation of Digital Seismograph Networks. Dataset/Seismic Network. 10.7914/SN/NP

Data Access

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Additional Notes Data from the NP network are archived in several locations. Data in miniSEED are available from IRIS, the NCEDC, and SCEDC. Recordings of strong motions are available from the Center for Engineering Strong Motion Data ( in COSMOS format.

Stations in this Network