Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/6044| DC Field | Value | Language |
|---|---|---|
| dc.contributor.authorall | Malagnini, L.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Nielsen, S.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.authorall | Mayeda, K.; Weston Geophysical Corporation, Lexington, MA, and University of California, Berkeley, CA | en |
| dc.contributor.authorall | Boschi, E.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione AC, Roma, Italia | en |
| dc.date.accessioned | 2010-06-21T07:03:10Z | en |
| dc.date.available | 2010-06-21T07:03:10Z | en |
| dc.date.issued | 2010-06-01 | en |
| dc.identifier.uri | http://hdl.handle.net/2122/6044 | en |
| dc.description.abstract | The amount of energy radiated from an earthquake can be measured using recent methods based on earthquake coda signals and spectral ratios. Such methods are not altered by either site or directivity effects, with the advantage of a greatly improved accuracy. Several studies of earthquake sequences based on the above measurements showed evidence of a breakdown in self-similarity in the moment to energy relation. Radiated energy can be also used as a gauge to estimate the average dynamic stress drop on the fault. Here we compute the dynamic stress drop, infer the co-seismic friction and estimate the co-seismic heating resulting from the frictional work during events from different main shock-aftershock earthquake sequences. We relate the dynamic friction to the maximum temperature rise estimated on the faults for each earthquake. Our results are strongly indicative that a thermally triggered dynamic frictional weakening is present, responsible for the breakdown in self-similarity. These observations from seismic data are compatible with recent laboratory evidence of thermal weakening in rock friction under seismic slip-rates, associated to various physical processes such as melting, decarbonation or dehydration. | en |
| dc.description.sponsorship | Kevin Mayeda was supported under Weston Geophysical subcontract No. GC19762NGD and AFRL contract No. FA8718-06-C-0024. Work by L. Malagnini was performed under the auspices of the Dipartimento della Protezione Civile, under contract S3 – INGV-DPC (2007-2009), project: “Valutazione rapida dei parametri e degli effetti dei forti terremoti in Italia e nel Mediterraneo”. | en |
| dc.language.iso | English | en |
| dc.publisher.name | American Geophysical Union | en |
| dc.relation.ispartof | Journal of Geophysical Research | en |
| dc.relation.ispartofseries | /115 (2010) | en |
| dc.subject | earthquake radiation | en |
| dc.subject | coda | en |
| dc.subject | friction | en |
| dc.subject | self-similarity | en |
| dc.subject | dynamic weakening | en |
| dc.title | Energy radiation from intermediate to large magnitude earthquakes: implications for dynamic fault weakening | en |
| dc.type | article | en |
| dc.description.status | Published | en |
| dc.type.QualityControl | Peer-reviewed | en |
| dc.description.pagenumber | B06319 | en |
| dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.03. Earthquake source and dynamics | en |
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Implications of hydrostatic pore pressures at high crustal strength for the deformation of intraplate lithosphere, Tectonophysics, 336, pp. 19-30. | en |
| dc.description.obiettivoSpecifico | 3.1. Fisica dei terremoti | en |
| dc.description.journalType | JCR Journal | en |
| dc.description.fulltext | open | en |
| dc.contributor.author | Malagnini, L. | en |
| dc.contributor.author | Nielsen, S. | en |
| dc.contributor.author | Mayeda, K. | en |
| dc.contributor.author | Boschi, E. | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Roma1, Roma, Italia | en |
| dc.contributor.department | Weston Geophysical Corporation, Lexington, MA, and University of California, Berkeley, CA | en |
| dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione AC, Roma, Italia | en |
| item.openairetype | article | - |
| item.cerifentitytype | Publications | - |
| item.languageiso639-1 | en | - |
| item.grantfulltext | open | - |
| 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 Roma1, Roma, Italia | - |
| crisitem.author.dept | Durham University, Durham, UK | - |
| crisitem.author.dept | UC Berkeley | - |
| crisitem.author.orcid | 0000-0001-5809-9945 | - |
| crisitem.author.orcid | 0000-0002-9214-2932 | - |
| crisitem.author.orcid | 0000-0003-0980-0605 | - |
| crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.classification.parent | 04. Solid Earth | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
| Appears in Collections: | Article published / in press | |
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| Malagnini_etAl_JGR_Final_Revised9.pdf | Main article & figures | 8.77 MB | Adobe PDF | View/Open |
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