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  Deep Ocean Seismicity from Hydroacoustic Monitoring
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Earthquakes at Axial Volcano image Earthquakes from 1998 Axial Volcano eruption detected acoustically.

View latest NE Pacific seismicity as detected using SOSUS here.

 

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.

New->
Offshore Oregon Earthquakes, Juan de Fuca, April 2008
Gorda-Blanco-Southern Juan de Fuca, July 2007
Gorda Ridge, NE Pacific, March 2005
Endeavour Ridge, NE Pacific, February 2005

Popular Sites->
Endeavour Ridge, NE Pacific, October 2004
Hydrophone Data available (see lower left)

 
         
         
  General Seismicity- . Seismic/Volcanic Activity-  
 

Maps:NE Pacific map

 

Northeastern Pacific-
quarterly maps
most recent seismicity

Eastern equatorial Pacific-
regional maps

North Atlantic-
regional maps

  Northeastern Pacific (1993-present):
Eastern equatorial Pacific (1996-present):
North Atlantic (2001-present):
 
             
 

Get Data:

Epicenter positions: Epicenter Retrieval page

Hydrophone data: 1-day files (ftp)

 

High interest events:

Middle Valley Activity (9/2001)

Lucky Strike Activity (3/2001) Seismic swarm with characteristics of magmatic dike injection.

 
             
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