Model Update January 2013: Upper Mantle Heterogeneity beneath North America from Travel-Time Tomography with Global and USArray Transportable Array Data

摘要

As of January 2013, theTransportable Array (TA) of USArray (http://www.iris.edu/USArray/, last accessed September 2013), the seismological component of EarthScope (http://www.earthscope.org/, last accessed September 2013), has extended east of the Great Plains and into the Midwest and Gulf Coast regions, offering routinely processed data for travel-time inversions in regions where little data were previously available. In previous research notes (Burdick et al., 2008, 2009, 2010, 2012) we presented 3D tomographic models of mantle P-wavespeed from global and USArray-TA travel-time data recorded through November 2007, December 2008, January 2010, and March 2011, respectively. Here we present our global model updated with USArray-TA data through January 2013. As before, we make the new model, MITP_USA_2013JAN, ? available as an electronic supplement to this paper. Full interpretation of the 3D tomographic model is beyond the scope of this brief research note.