The USArray component of the NSF-funded EarthScope project ended its observational period in September 2021 and all remaining close-out tasks concluded in March 2022. Hundreds of seismic stations were transferred to other operators and continue to collect scientific observations. This USArray.org website is now in an archival state and will no longer be updated. To learn more about this project and the science it continues to enable, please view publications here: http://usarray.org/researchers/pubs and citations of the Transportable Array network DOI 10.7914/SN/TA.

To further advance geophysics support for the geophysics community, UNAVCO and IRIS are merging. The merged organization will be called EarthScope Consortium. As our science becomes more convergent, there is benefit to examining how we can support research and education as a single organization to conduct and advance cutting-edge geophysics. See our Joining Forces website for more information. The site earthscope.org will soon host the new EarthScope Consortium website.

Quick Links

Featured Station

O02D

Mt. Diablo Meridian, CA, USA

Station Photo

O02D

Flexible Array Deployments

Wabash Valley Seismic Experiment

Mid-Atlantic Geophysical Integrative Collaboration (MAGIC)

Quebec-Maine Transect

Imaging Magma Under St. Helens (iMUSH)

SUwanee Suture and GA Rift basin experiment (SUGAR)

Seismic Investigation of Edge-Driven Convection Associated with the Rio Grande Rift: (SIEDCAR)

The Southeastern Suture of the Appalachian Margin Experiment: (SESAME)

Sierra Nevada EarthScope Project (SNEP)

Parkfield Trapped Waves

Basin & Range

Origin of the Columbia River Basalts and Uplift of the Wallowa Mountains

Central Oregon Locked Zone Array: (COLZA)

Superior Province Rifting Earthscope Experiment: (SPREE)

Salton Seismic Imaging Project (SSIP)

West Idaho Shear: Passive and Active Studies

Northern Embayment Lithosphere Experiment: (NELE)

Seismic Tomography and Location Calibration Around the SAFOD Site: (PASO-TRES)

Making the San Andreas Fault at the Mendocino Triple Junction

Unlocking the Inner Life of Cascadia Tremor with an Array of Arrays

Structure and Dynamics of the North American Craton - An EarthScope Swath from the Ozarks to the Grenville Front: (OIINK)

Flexarray 3D Passive Seismic Imaging of Core-complex Extension in the Ruby Range, Nevada

Resolving structural control of episodic tremor and slip along the length of Cascadia