T6 The Multidisciplinary Approach of the Seismotectonics as a Key Tool to Expand Horizons on Faulting Process Understanding and to Address Effective Seismic Hazard Assessment I

Monday, 26 October 2020
1:30 PM - 5:30 PM
Meeting Rooms

SHORT-TERM FAULTING BEHAVIOUR BY INCLUDING GREATER DETAIL IN EARTHQUAKE CATALOGUES: SOME CASE STUDIES IN NORTHERN AND CENTRAL APENNINES FAULT SYSTEMS (ITALY)

Paper number: T6-8
Program: Technical Sessions
Time: 3:05 PM – 3:20 PM

Authors

  • Alessandro Vuan Presenting Author
    National Institute of Oceanography and Applied Geophyiscs, Sgonico, Trieste

Abstract

Recent developments in seismic event detection techniques allow increasing the detail with which earthquakes are monitored, helping to improve the catalogues and to lower the completeness magnitude.

At the same time, for distinct fault systems and tectonic styles, disparate modes of short-term slip behaviour have been discovered, through steady aseismic creep, aseismic transients, clustered earthquakes, as well as regular earthquakes.

This improved knowledge has led to identifying analogies between laboratory experiments and observed earthquake sequences, where seismicity over time and space follows common and recurrent patterns.

The behaviour of microseismicity, as a proxy for identifying the degree of weakening material, clustering, changes in tectonic loading, and earthquake initiation, if integrated with geodetic observations and measurements of the geochemical parameters, could be promising in providing useful indications for the short-term hazard.

We discuss template matching results obtained for seismicity preceding the sequences in Central Italy (2009 and 2016), during the 2012 Emilia sequence and, as well as, on 5-years of a creeping low-angle normal fault.

Geological Society of America Abstracts with Programs. Vol. 52, No. 6

doi: 10.1130/abs/2020AM-355626

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