[Forum SIS] avviso di seminario all'IAC il 6 dicembre 2017

[Sebastiani, Giovanni]

ANNUNCIO DI SEMINARIO

6 Dicembre 2017 - ore 11:00
Aula riunioni IAC - primo piano,
Istituto per le Applicazioni del Calcolo “M. Picone”- CNR, via dei Taurini
19, Roma
<https://maps.google.com/?q=via+dei+Taurini+19,+Roma&entry=gmail&source=g>

Giovanni Sebastiani
IAC-CNR

Analysis of seismic data from three recent earthquakes in the Appennines
(Italy)

Abstract: Some results of the statistical analysis of seismic data from the
earthquakes of Amatrice-Norcia-Campotosto (2016-17), L’Aquila (2009)
and Colfiorito (1997-98) are illustrated and discussed. The spatio-temporal
properties of seismic events following a mainshock (aftershocks) are
investigated.
Mathematical Morphology and non parametric statistics are used to reduce
the effect of spatial noise. Parametric analysis in time domain and spectral
analysis are performed. The probabilistic properties of inter-arrival times
of
aftershocks are also studied. The results obtained show evidence of two
different kinds of aftershock sequences. A possible interpretation of this
fact
in terms of the geological properties of the spatial regions involved is
discussed.
Furthermore, the evidence provided suggests the development of local
stochastic models based on non-stationary processes, e.g. the Hawkes
process.
This work is in collaboration with Dr. Aladino Govoni and Dr. Luca Pizzino
of
the Istituto Nazionale di Geofisica e Vulcanologia (INGV).


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