USArray Consists of Four Observatories

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

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

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

Central Plains States Look Forward to Arrival of the Transportable Array

As EarthScope's seismometers move into the mid-continent region, they will significantly enhance earthquake detection capabilities in the Central Plains states and provide information about the Earth’s interior. Read More

Bids Invited to Provide MT Transportable Array Services

The EarthScope Magnetotelluric program is seeking proposals from interested parties to provide siting/permitting and/or field operations/data acquisition services for the 2010 field season. Read More

IRIS-Issued School Seismograph Helps Determine Location of Recent Illinois Earthquake

The classroom seismograph at the Da Vinci Academy, a participant in the IRIS Seismographs in Schools program, recorded the February 10 earthquake near Chicago and provided information to determine the location of this event. Seismologist Suzan van der Lee explains to viewers what scientists know about earthquakes, faults and the subsurface in Illinois. Read More