Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/4592
AuthorsPiccinini, D.* 
Saccorotti, G.* 
TitleFirst observations of non-volcanic, long-period seismicity in the Central Apennines, Italy
Issue Date20-Jun-2008
Series/Report no./35(2008)
DOI10.1029/2008GL034120
URIhttp://hdl.handle.net/2122/4592
KeywordsLong-period events
apennines
fluids
Subject Classification04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring 
AbstractWe report unprecedented observations of long-period (LP) seismicity in non-volcanic setting. Our data are from the Central-Northern sector of the Apennine chain, Italy. For this area, intense CO2 circulation of mantle origin has been documented by either groundwater composition and borehole measurements. We perform waveform correlation and stacking to obtain reliable epicenter estimates. Following Chouet's crack model, we find that both the quality factor and dominant frequency of LP oscillations are consistent with the sustained resonance of a wet crack filled by a water-CO2 mixture.
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