Kim's CAT/SCAN Page
CAT/SCAN: Calabria-Apennine-Tyrrhenian/Subduction-Collision-Accretion Network

A Joint American-Italian Project to Monitor Earthquakes on the Most Active Seismic Belt in Italy

The Italian peninsula across the Mediterranean Sea is part of the tectonic plate boundary - the accommodation zone -- between the Eurasian and the African plates, which continue to move closer to each other. This motion controls the long-term evolution of the boundary, but recent geologic changes suggest a more rapid tectonic event superimposed on the slow motion of the big plates and localized to the Apennine arc. This signature event of the Italian peninsula is most dramatically manifested in the current deformation along the Calabrian portion of the arc and is the main focus of this project.

Researchers from the Lamont-Doherty Earth Observatory, Istituto Nazionale di Geofisica e Vulcanologia, and the Universita Della Calabria deployed 40 portable digital broadband seismographs throughout southern Italy during December 2003 and October 2005. Researchers from three organizations are working together to analyze waveform data acquired by these portable broadband seismographic stations. These instruments recorded both global and regional earthquakes for 22 months. Researchers also deployed an additional 10 digital broad-band ocean-bottom seismometers (OBS) offshore for a period of 12 months.

Researchers use signals from distant earthquakes to develop a catscan, or a three dimensional image, of the Earth's crust and mantle beneath the Italian Peninsula of the earth. Using seismic data from local and regional earthquakes in southern Italy, researchers are also studying seismic ground motions in the region for evaluating the earthquake hazards in southern Italy.


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Last Edited: January 2006