Comparison between reprocessed seismic profiles: Seismologic and geologic data - A case study of the Colfiorito earthquake area

摘要

Seismic reflection data are used to reconstruct the subsurface geologic Structures below the Umbria-Marche region in Italy, a highly seismogenic area with a recent history of seismic activity (the 1997-1998 Colliorito sequence). We reprocess three vibroseis seismic profiles (acquired in the early 1980s for hydrocarbon exploration) whose stacked sections were optimized for relatively deep oil targets. On the reprocessed seismic profile closest to the epicentral area, we construct the main reflectors to a depth of about 4 s (two-way time) and compare this interpretation with the available hypocenters of the 1997 earthquakes.