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Nonlinear Inversion of S-Wave Polarization for Constraining the Source Mechanism of Small Earthquakes

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Volcanic Seismology

Part of the book series: IAVCEI Proceedings in Volcanology ((VOLCANOLOGY,volume 3))


An accurate estimate of micro-earthquake source mechanisms in volcanic areas may be obtained by using three-component S waveforms from near source records. S-wave polarizations recorded at the earth’s surface are here used to infer the parameters of a point-source double couple fault model (strike, dip and slip angles of the fault plane) for an earthquake. We define an error function associated to polarization misfits, and a related probability density function which is computed in the whole model space. Because of the small number of parameters, the probability density function can be represented on plane view projections. This gives a global image of the resolution pf model parameters by actual data. This method has been applied to estimate the source mechanism of an ML = 2 earthquake which occurred at the Campi Flegrei caldera during the recent seismic crisis of (1983–1984).

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  • Aki K, Richards P (1980) Quantitative seismology. Freeman, San Francisco, 913 pp.

    Google Scholar 

  • Aster R, Meyer RP (1988) 3-Dimensional velocity structure and hypocenter distribution in the Phlegraean Field, Italy. Tectonophysics, 199:195–218.

    Article  Google Scholar 

  • Bernard P, Zollo A (1989) Inversion of near source S polarization for parameters of double couple point sources. Bull Seism Soc Am, 79:1779–1809.

    Google Scholar 

  • Bernard P, Zollo A (1988) Inversion of S polarization from near source accelerograms: application to the records of 1980 Irpinia earthquake (Italy). Bonnin J et al. (eds) In: Seisuric hazald in reditenulan regions. Kluwer, Dotdrecht, The Netherlands.

    Google Scholar 

  • CNR (1987) Phlegrean Fields. Rosi M, Sbrana A (ed) Pubbl CNR m. 114, 9.

    Google Scholar 

  • Del Re G, La Volpe G (1988) Lo sciame sismico del 1 Aprile 1984 ai Campi Flegrei: intrusione magmatica o rottura di asperitá? Tesi di Laurea in Fisica Terrestre, Univ Napoli, Italia.

    Google Scholar 

  • De Natale G, Iannaccone G, Martini M, Zollo A (1987) Seismic sources and attenuation properties at the Campi Flegrei volcanic area. Pageoph 125:884–917.

    Article  Google Scholar 

  • Farra V, Bernard P, Madariaga R (1986) Fast near source evaluation of strong ground motion for complex source models. Ewing Symp 6, AGU, Wash.

    Google Scholar 

  • Tarantola A, Valette B (1982) Inverse problem = quest for information. J Geophys 50:159–170.

    Google Scholar 

  • Zollo A, Bernard P (1989) Near source S wave polarization inversion of the 15 October 1979, 23:19 Imperial Valley aftershock records: evidence for anisotropy and for a single double-couple mechanism. Geophys Res Lett. 16:1047–1050.

    Article  Google Scholar 

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© 1992 Springer-Verlag Berlin Heidelberg

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Zollo, A., Bernard, P. (1992). Nonlinear Inversion of S-Wave Polarization for Constraining the Source Mechanism of Small Earthquakes. In: Gasparini, P., Scarpa, R., Aki, K. (eds) Volcanic Seismology. IAVCEI Proceedings in Volcanology, vol 3. Springer, Berlin, Heidelberg.

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  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-77010-4

  • Online ISBN: 978-3-642-77008-1

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