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Recent earthquakes in the CEUS, including the 2011 M5.8 Virginia earthquake, have raised awareness of the comparative lack of knowledge about seismicity, site response to ground shaking, and the basic geologic underpinnings in this densely populated region of the country. The mission of the CEUSN is to produce data that enables researchers and Federal agencies alike to better understand the basic geologic questions, background rates of earthquake occurrence and distribution, seismic hazard potential, and associated societal risks of this region. Read More

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MAGIC involves a collaborative effort among seismologists, geodynamicists, and geomorphologists. We are undertaking a two-year deployment of 28 broadband seismometers in a dense linear transect from the Atlantic coast to the continental interior. In combination with EarthScope USArray Transportable Array (TA) stations our experiment geometry will provide an opportunity to image isotropic and anisotropic crust and mantle structure from the coast to the continental interior in unprecedented detail, using techniques such as shear wave splitting, receiver function analysis, and tomographic inversions. Read More

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This project focuses on the Mount St. Helens volcanic edifice, (WA, USA), whose explosive eruption in 1980 attracted the world's attention, and was the first volcano to be thoroughly monitored with modern instruments. Mount St. Helens provides an ideal setting to apply state-of-the-art geophysical and geochemical techniques to image its subterranean roots: It is active, easily accessible, and has a well recorded past history. Read More

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Investigators are using travel-time tomography to create velocity models that reveal the distribution of igneous rocks, variations in the thickness of the crust and variations in crustal composition. Besides a better understanding of fundamental tectonic processes, other benefits of this program include training and education of students, and characterization of basins and igneous rocks that might be good targets for carbon sequestration. Read More

FAQs on the Merger of IRIS and UNAVCO

Thu, 09 Jul 2023 10:44:00 -0400

The IRIS-UNAVCO Negotiation Committee provides answers to the communities' most frequently asked questions. Read More

Update #4 on Joint IRIS/UNAVCO Negotiations

Tue, 30 Jun 2023 11:42:00 -0400

On June 16 and 17, the joint IRIS/UNAVCO negotiation committee held its 4th meeting. 手机火狐翻墙

RFI: Seeking Expressions of Interest from IRIS and UNAVCO Member Institutions for Hosting Future Geophysical Facilities

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IRIS and UNAVCO, both university consortia, are interested in identifying member institutions that may be willing to host one or more functions of a future (post-2023) merged IRIS-UNAVCO organization. Read More