Abstract
A Global Slope Dataset for Calculation of Peak-Ground Acceleration Track: Mining and Geosciences Author(s): Kristine Verdin, Diego Pedreros, Jonathan Godt, James Verdin, Bruce Worstell, Chris Funk Ground shaking from strong earthquakes causes significant damage, injuries, and fatalities and may trigger widespread landsliding in mountainous regions. The USGS PAGER (Prompt Assessment of Global Earthquakes for Response) system is designed to provide real-time estimates of human impacts anywhere in the world. Critical peak-ground acceleration is a function of geologic, soil, and topographic parameters. The main driving parameter is slope, the first derivative of elevation. ArcGIS was used to meet the need for a global slope dataset for calculation of PAGER critical peak-ground acceleration at 30-arcsecond resolution. Zonal functions were used to summarize slopes from 1-arcsecond (90 meter) data acquired by the Shuttle Radar Topography Mission (SRTM). Slope estimates in SRTM data void areas posed a significant challenge that was met by statistical methods referencing GTOPO30 elevations. The resulting dataset consists of a 30-arcsecond framework with slope values available for 10th, 30th, 50th, 70th, and 90th percentile ranks. Kristine Verdin SAIC Mundt Federal Building Sioux Falls , SD 57198 US Phone: 605-594-6002 E-mail: kverdin@usgs.gov Diego Pedreros University of California-Santa Barbara Department of Geography University of California Santa Barbara , CA 93106 US Phone: 805-893-8322 E-mail: pedreros@usgs.gov Jonathan Godt USGS 1711 Illinois Golden , CO 80401 US Phone: 303-273-8626 E-mail: jgodt@usgs.gov James Verdin USGS Mundt Federal Building Sioux Falls , SD 57198 US Phone: 605-594-6111 E-mail: verdin@usgs.gov Bruce Worstell SAIC EROS Data Center Sioux Falls , SD 57198 US Phone: 605-594-6047 E-mail: worstell@usgs.gov Chris Funk UC-Santa Barbara Dept of Geography Santa Barbara , CA 93106 US Phone: 805-893-8322 E-mail: chris@geog.ucsb.edu |
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