Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/6902
AuthorsHerrmann, R.* 
Malagnini, L.* 
Munafo, I.* 
TitleRegional Moment Tensors of the 2009 L'Aquila Earthquake Sequence
Issue Date2011
Series/Report no.3/101(2011)
URIhttp://hdl.handle.net/2122/6902
KeywordsL'Aquila sequence
focal mechanisms
Subject Classification04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis 
AbstractBroadband waveform inversion of ground velocities in the 0.02 0.10 Hz frequency band is successfully applied to 181 earthquakes with ML ≥ 3 of the April, 2009, L'Aquila, Italy, earthquake sequence. This was made possible by the development of a new regional crustal velocity model constrained by deep crustal profiles, surfacewave dispersion and teleseismic Pwave receiver functions and tested through waveform fit. Although all earthquakes exhibit normal faulting, with the fault plane dipping southwest at about 55º for the majority of events, a subset of events had much shallower dips. The issue of confidence in the derived parameters was investigated by applying the same inversion procedure by two groups who subjectively selected different traces for inversion. The unexpected difficulty in modeling the regional broadband waveforms of the mainshock as a point source was investigated through an extensive finitefault modeling of broadband velocity and accelerometer data, which placed the location of major moment release updip and about 47 seconds after the initial firstarrival hypocentral parameters.
Appears in Collections:Papers Published / Papers in press

Files in This Item:
File Description SizeFormat 
Herrmann_Malagnini_Munaf_BSSA2011.pdfmain article1.29 MBAdobe PDFView/Open
Show full item record

Page view(s)

84
Last Week
0
Last month
0
checked on Aug 15, 2017

Download(s)

1,895
checked on Aug 15, 2017

Google ScholarTM

Check