Earth-prints repository, logo   DSpace

About DSpace Software
|earth-prints home page | roma library | bologna library | catania library | milano library | napoli library | palermo library
Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/7799

Authors: Avallone, A.*
Marzario, M.*
Cirella, A.*
Piatanesi, A.*
Rovelli, A.
Di Alessandro, C.
D'Anastasio, E.
D'Agostino, N.*
Giuliani, R.*
Mattone, M.*
Title: Very high rate (10 Hz) GPS seismology for moderate-magnitude earthquakes: The case of theMw6.3 L'Aquila (central Italy) event
Title of journal: Journal of Geophysical Research
Series/Report no.: /116 (2011)
Issue Date: 2011
DOI: 10.1029/2010JB007834
Keywords: 10 Hz GPS seismology
Abstract: The 2009 April 6th Mw 6.3 L'Aquila destructive earthquake was successfully recorded by closely 23 spaced 10-Hz and 1-Hz recording GPS receivers and strong motion accelerometers located above or 24 close to the 50° dipping activated fault. We retrieved both static and dynamic displacements from 25 Very High-Rate GPS (VHRGPS) recordings by using Precise Point Positioning kinematic analysis. 26 We compared the GPS positions time series with the closest displacement time series obtained by 27 doubly-integrating strong motion data, first, to assess the GPS capability to detect the first seismic 28 arrivals (P waves) and, secondly, to evaluate the accelerometers capability to detect co-seismic 29 offsets up to ~45 s after the earthquake occurrence. By comparing seismic and VHRGPS frequency 30 contents, we inferred that GPS sampling rates greater than 2.5 Hz (i.e. 5 or 10 Hz) are required in 31 the near-field of moderate magnitude events to provide “alias-free” solutions of coseismic dynamic 32 displacements. Finally, we assessed the consistency of the dynamic VHRGPS results as a constraint 33 on the kinematic rupture history of the mainshock. These results suggested that the high-rate 34 sampling GPS sites in the near field can be as useful as strong motion station for earthquake source 35 studies.
Appears in Collections:04.06.06. Surveys, measurements, and monitoring
Papers Published / Papers in press

Files in This Item:

File SizeFormatVisibility
Avallone_etal_revised_def.pdf2.34 MBAdobe PDFView/Open


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.


Share this record
Del.icio.us

Citeulike

Connotea

Facebook

Stumble it!

reddit


 

Valid XHTML 1.0! ICT Support, development & maintenance are provided by CINECA. Powered on DSpace Software. CINECA