Cecic, Ina

Costa, Giovanni

Rupnik, Petra Jam\u161ek

Suhadolc, Peter

Tiberi, Lara

TIBERI, LARA

COSTA, GIOVANNI

SUHADOLC, PETER

Rupnik, Petra Jamšek

Archivio istituzionale della ricerca - Università di Trieste

ESC2016-264, 201635th General Assembly of the European Seismological Commission© Author(s) 2016. CC Attribution 3.0 License.The 1895 Ljubljana earthquake: can the intensity data pointsdiscriminate which one of the nearby faults was the causative one?Lara Tiberi (1), Giovanni Costa (1), Petra Jamšek Rupnik (2), Ina Cecic´ (3), and Peter Suhadolc (4)(1) University of Trieste, Dipartimento di Matematica e Geoscienze, trieste, Italy (lara.tiberi@gmail.com), (2) GeologicalSurvey of Slovenia, Department for Regional geology, Ljubljana, Slovenia, (3) Agencija RS za okolje, Ministry of theenvironment and spatial planning Slovenian Environment Agency, Ljubljana, Slovenia, (4) University of Trieste, Dipartimentodi Matematica e Geoscienze, trieste, Italy(Retired)The earthquake (Mw 6) that occurred in the central part of Slovenia on the 14th of April, 1895, affected a broadregion, causing deaths, injuries and destruction. This event was much studied but not fully explained, in particularits causative source model.The aim of this work is to contribute to the identification of the seismogenetic source of this destructive event, com-puting a series of ground motion scenarios based on various fault models and nucleation points in the surroundingsof Ljubljana: Vicˇ, Borovnica and Želimlje faults. The synthetic seismograms, at the basis of our computations, arecalculated using the multi-modal summation technique and a kinematic approach for extended sources. In partic-ular, we compute the maximum peak ground velocity value at 1 Hz.The qualitative and quantitative comparison of these simulations with the intensity field allows us to discriminatebetween various sources and configurations. The quantitative validation of the seismic source is done using an ap-propriate regression law, expressly calculated for this study. The main strong earthquakes used for this calculationare the two Bovec earthquakes (1998, 2004), the Aquila event of 2009 and the two Emilia ones of 20th and 29thof May, 2012.This study allows us to identify the most probable causative source model of this event, contributing to the im-provement of the seismotectonic knowledge of this region.

The 1895 Ljubljana earthquake: can the intensity data points discriminate which one of the nearby faults was the causative one?

The 1895 Ljubljana earthquake: can the intensity data points discriminate which one of the nearby faults was the causative one?

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Archivio istituzionale della ricerca - Università di Trieste