Ocean Seismicity Data - NOAA Vents Acoustic Monitoring Program

The Acoustic Monitoring Project of the VENTS Program began continuous monitoring of north Pacific Ocean seismicity in August 1991 using the U.S. Navy's SOund Surveillance System (SOSUS) In May, 1996, monitoring was extended to the eastern equatorial Pacific using moored autonomous hydrophones, with the North Atlantic added in March, 1999. The hydroacoustic method allows detection of low-magnitude seismicity and volcanic activity and provides more accurate source locations than land seismic networks. Hydrophone data from the North Eastern Pacific, Eastern Equatorial Pacific, and North Atlantic is available on this page.