ShakeMap: Combinação de observações instrumentais e macrossísmicas

Abstract

Since 2008, the Portuguese seismological service, has implemented the ShakeMap software package provided by U.S. Geological Survey (USGS), in order to obtain reliable maps of peak ground motion parameters and seismic intensities for mainland Portugal. These maps identify the area affected by the earthquake and estimate the severity of ground shaking, thus providing important information for emergency response planning and for the general public. The maps are produced based on regional constraints from instrumental ground motions and site amplifications. In late 2009, USGS released a new version (V3.5) of ShakeMap software with added features. The new approach introduces several changes in the existing ShakeMap methodology, allowing the combination of direct observations (observed peak ground motion and seismic intensities), observations converted parameters and estimates. Some results are presented and discussed in this work.