EarthScope in the Northern Rockies
EarthScope has three major components: USArray which operates the seismic observatory that includes the seismic reference network, the transportable array, the flex array, and the magnetotelluric array that is now operated and maintained by IRIS; the Plate Boundary Observatory, which is hosted by UNAVCO to study geodetics and active crustal deformation; and The San Andreas Fault Observatory at Depth (SAFOD) was a 3.1-kilometer deep borehole drilled directly into the San Andreas Fault midway between San Francisco and Los Angeles, near Parkfield, CA. More complete information about the EarthScope program can be found at the EarthScope National Office. Access to EarthScope Data is available for use by the geoscience research community and the general public.
The scientific goals of the EarthScope program include: (Defined in the EarthScope Science Plan 2010-2020)
- Imaging the Crust and Lithosphere Beneath North America,
- Active Deformation of the North American Continent (convergent margins; terrane boundaries and collisional margins; transcurrent, transpressional and transtensional margins; divergent and extensional regions; intraplate seismic zones),
- Continental Evolution Through Time--to develop a 4D model for the formation and evolution of the North American continent;
- Deep Earth Structure and Dynamics (subducted slabs and mantle drips, upwelling mantle, the lithosphere-aesthenosphere boundary, the 410 and 660km discontinuities, megapiles in the lower crust, structure of the core-mantle boundary)
- Earthquakes, Faults an Rheology of the lithosphere
- Magmas and Volatiles in the Crust and Mantle (subduction zones, extensional regions, continental transform faults, volcanic processes at crustal levels, synthesizing petrological, geochemical and geophysical observations, integrating electromagnetic and seismic methods for detecting fluids)
- Topography and Tectonics: Elucidating Time-Space Patterns of Lithospheric Deformation
- EarthScope and the Hydrosphere, Cryosphere, and Atmosphere
Pre- and Post- EarthScope Workshops in the Northern Rockies
To address the overarching EarthScope science goals, an interdisciplinary approach is needed that integrates data from geology, geophysics, geochemistry, geochronology, mineral physics, and related disciplines. To facilitate this integrated research, the EarthScope project sponsored a series of regional and topical workshops to develop community consensus on research priorities, opportunities and needs. In the Northern Rockies, two workshops were convened to a) plan for deployment of EarthScope instrumentation in 2005, and b) as a retrospective 14 years later to synthesize research advances made as an outcome of the EarthScope program:
Pre-EarthScope Workshop: EarthScope in the Northern Rockies was convened September 16-18, 2005, at Montana State University, Bozeman MT. The Workshop Program has posted all of the Powerpoint presentations at the workshop, and the final session has posted the summary recommendations from a number of working groups. You may also be interested in the Participant List. Take this opportunity to see what were the compelling research questions and research priorities in anticipation of deployment of EarthScope in the Northern Rockies. Download the Workshop Report and Recommendations (Acrobat (PDF) 1.1MB Dec19 06)
Post-EarthScope "Synthesis" Workshop: a second workshop was convened in January, 2019 (again at Montana State University): Life and Death of a Craton: A 4D EarthScope Perspective on the Role of the Wyoming Craton in the Evolution of North America. The Workshop Program has posted all of the Powerpoint presentations made by the participants, and you can download the Program and Abstracts (Acrobat (PDF) 9.1MB Feb22 19). Based on contributions from the participants, a comprehensive annotated bibliography has been developed, Wyoming Craton References that provides a place to start for future research initiatives, and for use in geoscience course work. Fourteen years later, how did we do? What are the key advances that have been realized as an outcome of the EarthScope program? What unexpected advances have been made? What research goals were not met, or what new research opportunities have been revealed?
See also the companion workshop, Develop a New Model for the 4-D Evolution of North America, convened by Steven Whitmeyer, John Hole, Terry Pavlis, Laura Webb, Mike Williams, Lara Wagner, at James Madison University, Harrisonburg, Virginia, November 18-20, 2016. Download the Workshop Summary Report (Acrobat (PDF) 109kB Mar18 19)