2006
DOI: 10.1111/j.1365-246x.2006.03045.x
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Fault slip and rupture velocity inversion by isochrone backprojection

Abstract: International audienceA new technique is proposed here for the retrieval of slip images from the backprojection of high-frequency displacement records. When direct S waves are seen to be dominant in the near-source data, Green functions can be approximated by the far-field terms, as described by ray theory. Assuming that the slip rapidly reaches the final value (i.e. short slip duration), the measured displacement can be ascribed to the slip contributions lying on the corresponding isochrone on the fault plane… Show more

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Cited by 22 publications
(45 citation statements)
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References 34 publications
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“…The most striking feature of the inverted rupture model is the large coseismic slip at very shallow depth, in agreement with the results obtained by other investigators ( Iwata and Sekiguchi , 2002; Semmane et al , 2005; Festa and Zollo , 2006). Also, the slip distribution from the main shallow patch to the south‐east and downdip direction has been observed by the above investigators.…”
Section: The Application To the 2000 Western Tottori (Japan) Earthquakesupporting
confidence: 91%
“…The most striking feature of the inverted rupture model is the large coseismic slip at very shallow depth, in agreement with the results obtained by other investigators ( Iwata and Sekiguchi , 2002; Semmane et al , 2005; Festa and Zollo , 2006). Also, the slip distribution from the main shallow patch to the south‐east and downdip direction has been observed by the above investigators.…”
Section: The Application To the 2000 Western Tottori (Japan) Earthquakesupporting
confidence: 91%
“…The seismic moments of the maximum likelihood models for σ sm M and σ sm,gps M are 1.9 × 10 19 and 1.6 × 10 19 N m, respectively. Semmane et al (2005) inferred values of seismic moment of 1.5– 1.7 × 10 19 N m, Festa & Zollo (2006), 2.6 × 10 19 N m and Piatanesi et al (2007)1.7 × 10 19 N m.…”
Section: Resultsmentioning
confidence: 99%
“…All these proposed images are similar in their general features—they all show a high slip patch near the surface. However, the presence of slip at the bottom of the fault is ambiguous: it has been recognized by Festa & Zollo (2006) and Piatanesi et al (2007) but not by Semmane et al (2005). Also the Peyrat & Olsen (2004) model does not require any slip at depth to fit the data, even though they consider a fault with a smaller depth extent compared with the ones used to obtain kinematic images.…”
Section: Introductionmentioning
confidence: 99%
“…Since the velocity at which a dynamic rupture advances on a fault c r is comparable with the velocities at which the information travels in an elastic medium (c p or c s for P and S waves respectively), the image that an observer has of an advancing rupture is deformed and stretched in the direction of the observer. Moreover, different observers look at the fault from different views, giving an overall image that relates to the envelope of the scanned areas [Festa and Zollo, 2006]. Since c s < c p , the fault region spanned by the P waves is smaller than the one imaged by the S waves, for the same time window on seismograms after the initial P-and S-arrivals.…”
Section: Discussionmentioning
confidence: 99%