The following highlights summarize research papers that have been recently published in Geophysical Research Letters (GRL), Journal of Geophysical Research-Solid Earth (JGR-B), and Journal of Geophysical Research-Oceans (JGR-C).
1. Active faults newly identified in Pacific Northwest
The Bellingham Basin, which lies north of Seattle and south of Vancouver, British Columbia, around the border between the United States and Canada in the northern part of the Cascadia subduction zone, is important for understanding the regional tectonic setting and current high rates of crustal deformation in the Pacific Northwest. Using a variety of new data, Kelsey et al. identify several active faults in the Bellingham Basin that have not been previously known. These faults lie more than 60 kilometers (37 miles) farther north of the previously recognized northern limit of active faulting in the area. The authors note that the newly recognized faults could produce earthquakes with magnitudes between 6 and 6.5 and thus should be considered in hazard assessments for the region.
Source: Journal of Geophysical Research-Solid Earth, doi:10.1029/2011JB008816, 2012 http://dx.doi.org/10.1029/2011JB008816
Title: Holocene faulting in the Bellingham forearc basin: Upper-plate deformation at the northern end of the Cascadia subduction zone
Authors: Harvey M. Kelsey: Department of Geology, Humboldt State University, Arcata, California, USA;
Brian L. Sherrod: U.S. Geological Survey, University of Washington, Seattle, Washington, USA;
Richard J. Blakely: U.S. Geological Survey, Menlo Park, California, USA;
Ralph A. Haugerud: U.S. Geological Survey, University of Washington, Seattle, Washington, USA.
2. In the Greek isles, a volcano has awakened
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American Geophysical Union