Alert Fishing Fleet of the Location of the Seismometer Instruments Off Part of Kodiak Island and the Alaska Peninsula

August 22, 2018 - 1:00 p.m.

Notice of a fishery management action.

Sustainable Fisheries
907-586-7228

The National Science Foundation funded the Alaska Amphibious Community Seismic Experiment which deployed 75 ocean bottom seismometers off the coast of part of Kodiak Island and the Alaska Peninsula in May and July of 2018.  This notice is to alert the fishing fleet of the locations of the seismometers instruments to avoid gear conflicts.  These instruments will sit on the sea bottom, record earthquakes, and be retrieved by about September 15, 2019.

These seismometers record thousands of previously undetectable earthquakes, and the data should help scientists better understand the processes that lead to large earthquakes and tsunamis off Alaska. Before deployment, the NOAA trawl-density maps helped guide placement of seismometer instruments.  However, some instruments may overlap with trawl areas.  Also, the type of instrument deployed in the waters less than 200 fathoms has a Trawl Resistant Mount (TRM).  The TRM has a clamshell like design that hopefully should deflect fishing gear on the bottom (see attached photo). Following is a map showing the location of some of the instruments, and the latitude and longitude of those in water less than 200 fathoms. 

More information about the Alaska Amphibious Community Seismic Experiment please contact Peter Haeussler, United States Geological Survey at pheuslr@usgs.gov or 907-786-7447.

Seismometer

Seismometer

Seismometer graphic

Location of some of the instruments, and the latitude and longitude of those in water less than 200 fathoms

 

 

 

Last updated by Alaska Regional Office on February 11, 2019