Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/566
DC Field | Value | Language |
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dc.contributor.authorall | Michelini, A.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione CNT, Roma, Italia | en |
dc.contributor.authorall | Lomax, A.; Anthony Lomax Scientific Software, Mouans-Sartoux, France | en |
dc.date.accessioned | 2005-11-25T09:11:16Z | en |
dc.date.available | 2005-11-25T09:11:16Z | en |
dc.date.issued | 2004 | en |
dc.identifier.uri | http://hdl.handle.net/2122/566 | en |
dc.description.abstract | We show that relative earthquake location using double-difference methods requires an accurate knowledge of the velocity structure throughout the study region to prevent artifacts in the relative position of hypocenters. The velocity structure determines the ray paths between hypocenters and receivers. These ray paths, and the corresponding ray take-off angles at the hypocenters, determine the partial derivatives of travel time with respect to the hypocentral coordinates which form the inversion kernel that maps double-differences into hypocentral perturbations. Thus the large-scale velocity structure enters into the core of the double-difference technique. By employing a 1D layered model with sharp interfaces to perform double-difference inversion of synthetic data generated using a simple, 1D gradient model; we show that inappropriate choice of the velocity model, combined with unbalanced source-receiver distributions, can lead to significant distortion and bias in the relative hypocenter positions of closely spaced events. | en |
dc.format.extent | 167702 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.relation.ispartof | Geophysical Research Letters | en |
dc.relation.ispartofseries | /31(2004) | en |
dc.subject | earthquake location | en |
dc.subject | Theory and modeling; | en |
dc.title | The effect of velocity structure errors on double-difference earthquake location | en |
dc.type | article | en |
dc.description.status | Published | en |
dc.type.QualityControl | Peer-reviewed | en |
dc.description.pagenumber | L09602 | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.99. General or miscellaneous | en |
dc.identifier.doi | doi:10.1029/2004GL019682 | en |
dc.relation.references | Chiaraluce, L., W. L. Ellsworth, C. Chiarabba, and M. Cocco (2003), Imaging the complexity of an active normal fault system, J. Geophys. Res., 108(B6), 2294, doi:10.1029/2002JB002166. Got, J.-L., J. Fre`chet, and F. W. Klein (1994), Deep fault plane geometry inferred from multiplet relative location beneath the south flank of the Kilauea, J. Geophys. Res., 99(B8), 15,375– 15,386. Jordan, T. H., and K. A. Sverdrup (1981), Teleseismic location techniques and their application to earthquake clusters in the south. central Pacific, Bull. Seismol. Soc. Am., 71, 1105– 1130. Rubin, A. M. (2002), Aftershocks of microearthquakes as probes of the mechanics of rupture, J. Geophys. Res., 107(B7), 2142, doi:10.1029/ 2001JB000496. Rubin, A. M., D. Gillard, and J.-L. Got (1999), Streaks of microearthquakes along creeping faults, Nature, 400, 635– 641. Schaff, D. P., G. H. R. Bokelmann, G. C. Beroza, F. Waldhauser, and W. L. Ellsworth (2002), High-resolution image of Calaveras Fault seismicity, J. Geophys. Res., 107(B9), 2186, doi:10.1029/2001JB000633. Um, J., and C. H. Thurber (1987), A fast algorithm for two-point seismic ray tracing, Bull. Seismol. Soc. Am., 77, 972– 986. Waldhauser, F., and W. L. Ellsworth (2002), Fault structure and mechanics of the Hayward Fault, California, from double-difference earthquake locations, J. Geophys. Res., 107(B3), 2054, doi:10.1029/2000JB000084. Waldhauser, F., and W. L. Ellsworth (2000), A double-difference earthquake location algorithm: Method and application to the northern Hayward fault, Bull. Seismol. Soc. Am., 90, 1353– 1368. Waldhauser, F. (2001), hypoDD-A Program to Compute Double-Difference Hypocenter Locations, U.S. Geol. Surv. Open File Rep. 01-113, 25 p. Waldhauser, F., W. L. Ellsworth, and A. Cole (1999), Slip-parallel seismic lineations on the northern Hayward fault, California, Geophys. Res. Lett., 26(23), 3525–3528, doi:10.1029/1999GL010462. Wessel, P., and W. H. F. Smith (1991), Free software helps map and display data, EOS Trans. AGU, 72, 445– 446. Wolfe, C. J. (2002), On the Mathematics of Using Difference Operators to Relocate Earthquakes, Bull. Seismol. Soc. Am., 92, 2879–2892. Zhang, H., and C. H. Thurber (2003), Double-Difference Tomography: The method and its application to the Hayward fault, California, Bull. Seismol. Soc. Am., 93, 1875–1889. | en |
dc.description.fulltext | partially_open | en |
dc.contributor.author | Michelini, A. | en |
dc.contributor.author | Lomax, A. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | en |
item.openairetype | article | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | restricted | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione ONT, Roma, Italia | - |
crisitem.author.orcid | 0000-0001-6716-8551 | - |
crisitem.author.orcid | 0000-0002-7747-5990 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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