Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/8428
DC Field | Value | Language |
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dc.contributor.authorall | Caciagli, Marco; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia | en |
dc.contributor.authorall | Garcia-Aristizabal, Alexander; AMRA | en |
dc.contributor.authorall | Selva, Jacopo; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia | en |
dc.date.accessioned | 2012-12-11T15:16:30Z | en |
dc.date.available | 2012-12-11T15:16:30Z | en |
dc.date.issued | 2012-12-03 | en |
dc.identifier.uri | http://hdl.handle.net/2122/8428 | en |
dc.description.abstract | The estimation of seismic parameters from ground-motion records is subject to many uncertainties, such as: (i) parameterization, modeling procedures and underlying hypotheses, (ii) approximated input parameters, (iii) instrumental errors on records and their impact in data post-processing, (iv) procedures to estimate model’s parameters. However these uncertainties are rarely treated and propagated to the final results. For example, on one side, density of rocks, velocity model, geometrical spreading, radiation pattern are just some of the common parameters needed to estimate the main seismic parameters of an earthquake and are generally used as average values. On the other side, uncertainties derived from the acquisition system and processing of the data are often neglected. Nevertheless, in many cases these uncertainties may be particularly important, as for example in the analysis of historical earthquakes, where both instrumental response and treatment of analog records intrinsically imply non negligible sources of uncertainty. Here, we present a new Bayesian procedure to estimate seismic parameters that allows: (i) to obtain a robust estimation of the Brune’s model parameters (Brune 1970, 1971) and relatives uncertainties, (ii) to account for the uncertainty related to the Earth model, and (iii) to propagate such uncertainties on the estimation of seismological parameters (seismic moment, moment magnitude, radius of the circular source zone and static stress drop). It is important to highlight that this study does not want to discuss the validity or the physical significance of the Brune’s model, but it is focused on the details of how to fit it on a dataset in order to evaluate the seismological parameters, accounting and properly propagating a rather large range of uncertainties. These capabilities of the proposed procedure are finally demonstrated through an illustrative application analyzing seismic records from historical events. | en |
dc.language.iso | English | en |
dc.relation.ispartof | AGU - Fall meeting 2012 | en |
dc.subject | Brune's parameters | en |
dc.subject | Bayesian framework | en |
dc.subject | historical seismograms | en |
dc.subject | sismic parameters | en |
dc.title | On the uncertainties of seismic parameters: a Bayesian framework for their estimation using Brune's model | en |
dc.title.alternative | S43A-2470: On the uncertainties of seismic parameters: a Bayesian framework for their estimation using Brune's model | en |
dc.type | Poster session | en |
dc.description.status | Unpublished | en |
dc.identifier.URL | http://fallmeeting.agu.org/2012/eposters/eposter/s43a-2470/ | en |
dc.subject.INGV | 04. Solid Earth::04.06. Seismology::04.06.09. Waves and wave analysis | en |
dc.description.ConferenceLocation | San Francisco, USA. | en |
dc.relation.references | Batlló, J., D. Stich, R. Macià (2008). Quatitative Analysis of Early Seismograph Recordings. Historical Seismology: Interdisciplinary Studies of Past and recent earthquakes. J.M. Fréchet, M.; Stucchi, M. (eds). Berlin, Springer Verlag. XVIII; 379-396. Brune, J. N. (1970). Tectonic Stress and Spectra of Seismic Shear Waves from Earthquakes. Journal of Geophysical Research 75(26): 4997-5009. Brune, J. N. (1971). Correction. Journal of Geophysical Research 76(20): 5002. Dineva, S., J. Batlló, D. Mihaylov, T. van Eck, (2002). Source parameters of four strong earthquakes in Bulgaria and Portugal at the beginning of the 20th century. Journal of Seismology 6(1): 99-123. Hanks, T. C. and H. Kanamori (1979). Moment Magnitude Scale. Journal of Geophysical Research 84(Nb5): 2348-2350. Hastings, W. K., 1970. Monte Carlo sampling methods using Markov chains and their applications, Biometrika, 57(1), 97-109. Keilis-Borok, V. I. (1960). Investigation of the mechanism of earthquakes. Sov. Res. Geophys. (English trans.) 4, 29. Menke, W. (1989). Geophysical Data Analysis: Discrete Inverse Theory. Revised Edition, vol. 45 of International Geophysics Series, Academic Press, Inc., New York. Metropolis, N. and Ulam, S. (1949). The Monte Carlo method. J. Amer. Stat. Assoc., 44, 335-341. Metropolis, N., Rosenbluth, A., Rosenbluth, M., Teller, A., and Teller, E. (1953) Equation of state calculations by fast computing machines. J. Chem. Phys., 21, 1081-1092. Stich, D., J. Batllo, R. Macìa, P. Teves-Costa, J. Morales (2005) Moment tensor inversion with single-component historical seismograms: The 1909 Benavente (Portugal) and Lambesc (France) earthquakes. Geophysical Journal International 162(3): 850-858. Tarantola, A. (2005) Inverse problem theory and methods for model parameter estimation. SIAM (Society for industrial and applied mathematics), Philadelphia. Teves-Costa, P., J. F. Borges, I. Rio, R. Ribeiro, C. Marreiros, (1999). Source Parameters of Old Earthquakes: semi-Automatic Digitization of Analog Records and Seismic Moment Assessment. Natural Hazards 19(2): 205-220. | en |
dc.description.obiettivoSpecifico | 3.1. Fisica dei terremoti | en |
dc.description.fulltext | open | en |
dc.contributor.author | Caciagli, Marco | en |
dc.contributor.author | Garcia-Aristizabal, Alexander | en |
dc.contributor.author | Selva, Jacopo | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia | en |
dc.contributor.department | AMRA | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italia | en |
item.openairetype | Poster session | - |
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 Bologna, Bologna, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Bologna, Bologna, Italia | - |
crisitem.author.orcid | 0000-0002-7248-4118 | - |
crisitem.author.orcid | 0000-0001-9196-8452 | - |
crisitem.author.orcid | 0000-0001-6263-6934 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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 | - |
Appears in Collections: | Conference materials |
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AGU-Poster-2012-Caciagli-Garcia-Selva_Final.pdf | Poster | 1.21 MB | Adobe PDF | View/Open |
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