Rupture imaging for the 2016 August 24, Mw=6.0 central Italy earthquake, from back-projection of strong-motion array data

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Gilberto Saccorotti
Davide Piccinini
Carlo Giunchi

Abstract

By extending the conventional Beam-Forming frequency-wavenumber power spectral estimate to the case of arbitrarily-shaped wavefronts, we obtained images of rupture propagation during the 2016 August 24, Mw=6.0 central Italy earthquake. Using a set of strong-motion accelerometers, we evaluate the beam power along the travel time curves associated with synthetic sources spanning a model fault surface. This allows deriving time-dependent images of the distribution of energy radiation throughout the fault plane. Results indicate bi-lateral rupture propagation toward SE and NW, in rough agreement with surface co-seismic displacement and surface damage pattern. To a first order, our results are also consistent with those obtained from full-waveform inversion of strong-motion data.

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How to Cite
1.
Saccorotti G, Piccinini D, Giunchi C. Rupture imaging for the 2016 August 24, Mw=6.0 central Italy earthquake, from back-projection of strong-motion array data. Ann. Geophys. [Internet]. 2016Dec.28 [cited 2021Jun.12];59. Available from: https://www.annalsofgeophysics.eu/index.php/annals/article/view/7294
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Letters

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