Summer 2010 ETS

Deep Tremor in Cascadia - a continuation of Array of Array experiment
March, 2010- .... (Summer 2010)

Main Tremor Index   |     Interactive Tremor Map   |     ETS diagnostic Spectrograms   |     Compare Maps   |    
PGC TAMS/SSA   |     Summary Spectrograms   |    

We will update this page with information, observations and studies of Cascadia deep tremor expected during the summer of 2010. The Array of Array experiment is a follow up to the CAFE experiment of the previous few years that explicitly uses up to eight arrays of 20-40 seismometers each in the northern Olympic Peninsula to study the ETS tremor as it moves under this region. News will be posted on this page (latest at the top) and references to figures from time to time.

There is a map of AofA installed stations for operation during the expected ETS period.

NEWS (latest at the top)


The University of Washington seismic group began studying deep tremor associated with Episodic Tremor and Slip (ETS) events in 2003 using both the regional PNSN and small aperture arrays. With NSF funding we installed three small aperture arrays in the spring/summer of 2004 and then Cascadia Arrays for Earthscope (CAFE) for both structural and tremor studies in 2007-2008. The CAFE experiment captured the ETS of fall, 2007 and winter, 2008.

In the past using stations from the PNSN and the USArray Transportable Stations (TA) we used a semi-automated processing system to track the general occurence of where and when deep tremor takes place. Starting in the fall of 2009 a completely automated tremor detection and location systems was put on line by Aaron Wech with an Interactive tremor map web interface.

As in the past we collaborate closely with the seismologists and geodesists of the Pacific Geoscience Centre (Natural Resources Canada) and Central Washington University to follow the development of the next ETS.

Previous Studies of ETS by UW scientists

Other information about ETS


Financial Support