Istituto nazionale di geofisica e vulcanologia
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Individual Seismogenic Sources

General information
HRIS002
Ston-Slano
Kastelic V.(1)
Kastelic V.(1)
1) Istituto Nazionale di Geofisica e Vulcanologia; Sismologia e Tettonofisica; Via di Vigna Murata, 605, 00143 Roma, Italy
17-Apr-2010
06-Nov-2013
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Parametric information
ParameterQualityEvidence
42.76 / 17.90 LD Based on data from Markusic et al. (1998).
11.0 LD Based on data from Markusic et al. (1998).
8.8 LD Based on data from Markusic et al. (1998).
5.8 LD Based on data from Markusic et al. (1998).
10.5 LD Based on data from Markusic et al. (1998).
328 LD Based on data of Global CMT catalogue.
32 LD Based on data of Global CMT catalogue.
92 LD Based on data of Global CMT catalogue.
0.4 ER Calculated from Mo using the relationship from Hanks and Kanamori (1979).
0.2…1.4 EJ Inferred from geodetic data.
286…2000 AR Inferred from slip rate and average displacement.
6.0 LD Based from data of Global CMT catalogue
LD=Literature Data; OD=Original Data; ER=Empirical Relationship; AR=Analytical Relationship;EJ=Expert Judgement;
 
Information about the associated Earthquakes
05 Sep 1996 Based on data from Markusic et al. (1998).
Unknown See "Commentary" for information.
 
 
Active Faults
Active Folds
Commentary

 

COMMENTS

Ston-Slano Source is a part of a NW-SE striking fault that runs offshore of the southern coast of the Mljet Island along the offshore Dubrovnik coastal area down to Boka Kotorska in Montenegro. The source is the location of the 1996 MW 6.0 earthquake, which is also the strongest instrumentally recorded earthquake in the coastal area of south Dalmatia and the strongest event after the destructive Mw 7.2 earthquake in 1667 (Papazachos and Papazachou, 1997; Markusic et al., 1998). The epicentre of the 1996 earthquake lies at the depth of 10 km, while the aftershock cluster is distributed in the depth interval between 5 and 20 km (Markuši? et al., 1998). The aftershock epicentres lie within a well-defined elongated ellipse with its major axis oriented in NE-SW direction (Markuši? et al., 1998). The main shock is located at the SW edge of the earthquake cluster. Focal mechanism solution (Global CMT) shows a dip slip thrust movements on shallow towards NE dipping thrust plane with NW-SE strike.

The parameters of the source agree with structural setting of the area. Active faults offshore and in the coastal zone of south Dalmatia between Pelješac peninsula and Montenegro display predominant thrust movements on NW-SE, NE dipping, fault planes (Ivanovi? et al., 1976; Herak, 1991; 1999). The faults within this area are characterized by medium dips (Kuk et al., 2000) with seismicity being concentrated in depths between 2 and 20 km (Markuši? & Herak, 1999). Slip rates for this area are higher compared to areas of northern part of the eastern Adriatic coast and give values of 2.2 mm/yr for seismic slip rates (Anderson & Jackson, 1987) and 4.5 mm/yr for geodetic slip rates respectively (Bennet et al., 2008; Caporali et al., 2009).

The source's slip rate value has been updated according to the findings of geodynamic model (Kastelic and Carafa, 2012) and considering available geodetic and geologic information. In such a way the slip rate value is in accordance with the hosting composite seismogenic fault's slip rate.

 
Pictures

 

Regional seismotectonic cross-section Details
Spatial distribution of the 1996 Ston-Slano earthquake sequence Details
Cross-sections through the 1996 Ston-Slano earthquake sequence Details
References

 

Anderson, H., and J. Jackson 1987 Active tectonics of the Adriatic Region. Geophys. J. R. Astr. Soc., 91, 937-983.
Bennett, R.A, S. Hreinsdóttir, G. Buble, T. Bašic, Ž. Bacic, M. Marjanovic, G. Casale, A. Gendaszek and D. Cowan 2008 Eocene to present subduction of southern Adria mantle lithosphere beneath the Dinarides. Geology, 36, 1, 3-6.
Caporali, A., C. Aichhorn, M. Barlik, M. Becker, I. Fejes, L. Gerhatova, D. Ghitau, G. Grenerczy, J. Hefty, S. Krauss, D. Medak, G. Milev, M. Mojzes, M. Mulic and other 10 Authors 2009 Surface kinematics in the Alpine-Carpathian-Dinaric and Balkan region inferred from a new multi-network GPS combination solution. Tectonophyics, 474, 1-2, 295-321, 10.1016/j.tecto.2009.04.035.
Ekström, G., and M. Nettles (Overseers) 2010 Global Centroid Moment Tensor Catalog. http://www.globalcmt.org/
Herak, M. 1991 Dinarides. Mobilistic view of the genesis and structure. Acta Geologica, 21, 35-117.
Herak, M., D. Herak and S. Markusic 1995 Fault plane solutions for earthquakes (1956-1995) in Croatia and neighbouring regions. Geofizica, 12, 43-56.
Herak, M. J. 1999 Tectonic interrelation of the Dinarides and the Southern Alps. Geologia Croatica, 52, 83-98.
Ivanovic, A., K. Sakac, B. Sokac, I. Vraslovic-Carevic and J. Zupanic 1976 Geology of the Obrovac sheet. Basic geological map 1:100.000, Inst. geol. istraž., Zagreb, Savezni geološki zavod, Beograd.
Kuk, V., E. Prelogovic and I. Dragicevic 2000 Seismotectonically active zones in the Dinarides. Geologia Croatica, 53, 2, 295-303.
Markušic, S., D. Herak, I. Ivancic and I. Sovic 1998 Seismicity of Croatia in the period 1993–1996 and the Ston-Slano earthquake of 1996. Geofizika, 15, 83-101.
Markusic, S., and M. Herak 1999 Seismic zoning of Croatia. Nat. Hazards, 18, 269-285.
Papazachos, B., and C. Papazachou 1997 The earthquakes of Greece. Editions Ziti, Thessaloniki, 304 pp.
Prelogovic, E., B. Pribicevic, Z. Ivkovic, I. Dragicevic, R. Buljan and B. Tomljenovic 2003 Recent structural fabric of the Dinarides and tectonically active zones important for petroleum-geological exploration in Croatia. Nafta, 55, 155-161.
Vannucci, G., S. Pondrelli, A. Argnani, A. Morelli, P. Gasperini and E. Boschi (eds) 2004 An atlas of Mediterranean seismicity. Ann. Geophys.-Italy, 47, 1, 334 pp., with CD-ROM.
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