Options
Source Parameters of the 2004 Kobarid (Western Slovenia) Seismic Sequence.
Type
Conference paper
Language
English
Obiettivo Specifico
3.3. Geodinamica e struttura dell'interno della Terra
Editor(s)
Status
Published
Issued date
November 20, 2012
Conference Location
Potenza, Italy.
Sponsors
MSP, EAGE, CODEVINTEC
Publisher
OGS, Universita' degli studi della Basilicata
Abstract
The Kobarid area (western Slovenia) was struck by two seismic sequences in
1998 and 2004. Corresponding mainshocks, occurred on April 12, 1998 and July 12, 2004, had
magnitude MW =5.7 and MW =5.2, respectively and were located 2.6 km away from each other. Both
of them were recorded by the Friuli-Venezia Giulia Seismometric Network, managed by the Istituto
Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), installed in north-eastern Italy
(http://www.crs.inogs.it). During the sequences, the network recorded hundreds of aftershocks and
both standard locations and duration magnitude (MD) estimations were performed. The seismic
activity lasted 198 and 135 days, respectively and consisted of 700 events with MD in the range [1.5,
4.6] and 300 events with MD in the range [1.1, 3.6], respectively (Bressan et al., 2009). In this work, we estimate the seismic moment, M0, the corner frequency, fC, the Brune stress
drop, ΔσB, the apparent stress, σa and the radiated energy, ES, of the mainshock and of 164
aftershocks of the Kobarid (2004) seismic sequence. The obtained results are compared with two
previous analysis performed in the same region, concerning the source parameter scaling of the
background seismicity (Franceschina et al., 2006) and of other seismic sequences (Bressan et al.,
2007) occurred in the area.
1998 and 2004. Corresponding mainshocks, occurred on April 12, 1998 and July 12, 2004, had
magnitude MW =5.7 and MW =5.2, respectively and were located 2.6 km away from each other. Both
of them were recorded by the Friuli-Venezia Giulia Seismometric Network, managed by the Istituto
Nazionale di Oceanografia e di Geofisica Sperimentale (OGS), installed in north-eastern Italy
(http://www.crs.inogs.it). During the sequences, the network recorded hundreds of aftershocks and
both standard locations and duration magnitude (MD) estimations were performed. The seismic
activity lasted 198 and 135 days, respectively and consisted of 700 events with MD in the range [1.5,
4.6] and 300 events with MD in the range [1.1, 3.6], respectively (Bressan et al., 2009). In this work, we estimate the seismic moment, M0, the corner frequency, fC, the Brune stress
drop, ΔσB, the apparent stress, σa and the radiated energy, ES, of the mainshock and of 164
aftershocks of the Kobarid (2004) seismic sequence. The obtained results are compared with two
previous analysis performed in the same region, concerning the source parameter scaling of the
background seismicity (Franceschina et al., 2006) and of other seismic sequences (Bressan et al.,
2007) occurred in the area.
File(s)
Loading...
Name
GNGTS2012_pro-p54-60.pdf
Description
Main article
Size
384.51 KB
Format
Adobe PDF
Checksum (MD5)
60bea885f69d7674d8ddddfecdd959af