USArray
A Continental-scale Seismic Observatory

Featured Deployments

Bighorns Mountains of Wyoming: Formation of Basement-involved Foreland Arches

Bighorns Mountains of Wyoming: Formation of Basement-involved Foreland Arches

This three year (2009-12) collaborative project will integrate arch-scale upper crustal geometries from surface exposures and petroleum industry subsurface data with the results of a hybrid seismic experiment. The passive component of this experiment consists of a 1.25 year (2009-10) deployment of 27 broadband seismometers that densify the EarthScope transportable array, a 6.5 month deployment of 220 short period seismometers, and a 9 day deployment of 800 high frequency "Texan" seismometers. Read More

Batholiths Onland 2009

Batholiths Onland 2009

In July 2009, several IRIS/PASSCAL scientists assisted with the Batholiths Onland project. This large group effort involved over 50 scientists and grad students, for the purpose of making "a seismic refraction and wide-angle reflection survey across the Coast Mountains batholith of British Columbia, Canada." Read More

Array of Arrays: Elusive ETS in the Cascadia Subduction Zone

Array of Arrays: Elusive ETS in the Cascadia Subduction Zone

The Array Operations Center supported research by the UW team, staging out of Sequim, Washington in June 2009. Eight arrays, each consisting of 10 Texan (single channel) and 10 RT130 (triple channel) data recorders were deployed across the northern Olympic Peninsula in hopes of catching the next Episodic Tremor event. Read More

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USArray Status

USArray Status

USArray News

Remembering Jim Fowler - Upcoming Events

Mon, 07 Apr 2014 11:33:17 -0400

Two events are being planned to remember our friend and colleague Jim Fowler. One will be held at the IRIS Workshop and the other at the PASSCAL Instrument Center.
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IRIS Bids Farewell to PASSCAL Program Manager James Gridley

Sat, 05 Apr 2014 21:57:37 -0400

James Gridley will be leaving IRIS to join Pinnacle, part of Halliburton, as the company’s Geophysics Adviser and Chief Technical Adviser in their largest production service line, Production Enhancement.
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Register for the 2014 IRIS Workshop, June 8-11, in Sunriver, Oregon

Wed, 05 Mar 2014 11:10:33 -0500

Make plans to attend the IRIS Workshop. Registration and program information are available on the Workshop web page.
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