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.

USArray
A Continental-scale Seismic Observatory

Flexible Array Deployments

Wabash Valley Seismic Experiment

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Mid-Atlantic Geophysical Integrative Collaboration (MAGIC)

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Quebec-Maine Transect

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Imaging Magma Under St. Helens (iMUSH)

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SUwanee Suture and GA Rift basin experiment (SUGAR)

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

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

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Sierra Nevada EarthScope Project (SNEP)

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map thumbParkfield Trapped Waves

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map thumbBasin & Range

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map thumbOrigin of the Columbia River Basalts and Uplift of the Wallowa Mountains

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map thumbCentral Oregon Locked Zone Array: (COLZA)

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map thumbSuperior Province Rifting Earthscope Experiment: (SPREE)

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map thumbSalton Seismic Imaging Project (SSIP)

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map thumbWest Idaho Shear: Passive and Active Studies

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map thumbNorthern Embayment Lithosphere Experiment: (NELE)

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

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map thumbMaking the San Andreas Fault at the Mendocino Triple Junction

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map thumbUnlocking the Inner Life of Cascadia Tremor with an Array of Arrays

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

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

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

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