HR: 0800h
AN: S51A-0215    [Abstracts]
TI: Implementation of the Near Real Time ShakeMap System in Romania
AU: * Ionescu, C
EM: viorel@infp.ro
AF: National Institute for Earth Physics, Magurele-Bucharest 12 Calugareni st., Bucharest, 077125, Romania
AU: Danet, A
EM: danet@infp.ro
AF: National Institute for Earth Physics, Magurele-Bucharest 12 Calugareni st., Bucharest, 077125, Romania
AU: Sorensen, M B
EM: sorensen@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Section 5.3, Telegrafenberg, Potsdam, 14473, Germany
AU: Zaharia, B
EM: bzaharia@infp.ro
AF: National Institute for Earth Physics, Magurele-Bucharest 12 Calugareni st., Bucharest, 077125, Romania
AU: Stromeyer, D
EM: stro@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Section 5.3, Telegrafenberg, Potsdam, 14473, Germany
AU: Grunthal, G
EM: ggrue@gfz-potsdam.de
AF: GeoForschungsZentrum Potsdam, Section 5.3, Telegrafenberg, Potsdam, 14473, Germany
AB: The USGS ShakeMap program is a tool for the near real-time generation of ground-shaking maps following data from seismic station sites equipped with accelerometers and velocity sensors. These maps provide vital information within minutes after an earthquake to emergency response agencies. ShakeMap data at the Romania National Data Center (RO_NDC) is based on input data from the Antelope system used for real-time seismic data acquisition and automatic detection. Shakemaps are produced on the basis of observed ground motion values (peak velocities, peak accelerations) and Intensity for the Vrancea region based on epicentral distance. Currently, the ShakeMap system is functional and is generating real-time shakemaps in test mode using data from more than 20 broadband and 20 strong motion stations. In the future about 35 strong motion stations will be added for real time acquisition in the Antelope system and in ShakeMap. The site corrections are based on the average shear-wave velocity values for the uppermost 30 meters (Vs30) estimated from the surface topography using the global Vs30 server (Wald et al., 2004 and Wald and Allen, 2007). However, research to utilize geologic information for the Vs30 calculations is in progress. Attenuation relations based on local data are included with the ShakeMap installation for interpolation of ground motions between the recording stations. Shakemaps generated based only on these relations for historical earthquakes leads to satisfactory estimates of the macroseismic intensity distribution due to these events. Inclusion of recorded data in such estimates, however, will lead to more reliable shakemaps.
DE: 7212 Earthquake ground motions and engineering seismology
SC: Seismology [S]
MN: 2007 Fall Meeting