Evolution of the stress field in the northern Aegean Sea (Greece)

Details Evolution of the stress field in the northern Aegean Sea (Greece) Evolution of the stress field in the northern Aegean Sea (Greece)

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001geoji.146..747p&link_type=abstract

Geophysical Journal International, Volume 146, Issue 3, pp. 747-759.

Astronomy and Astrophysics

Astronomy

15

North Aegean Sea, Stress Evolution, Strike-Slip Faulting

Scientific paper

The evolution of the stress field in the area of the northern Aegean Sea during the 20th century has been studied. The area is dominated by dextral strike-slip faulting and is characterized by frequent strong earthquakes. Coulomb stress changes (ΔCFF) were calculated assuming that earthquakes can be modelled as static dislocations in an elastic half-space, and taking into account both the coseismic slip in large (M>=7.0) earthquakes and the slow tectonic stress build-up along the major fault segments. The stress change calculations were performed for strike-slip faults of strike, dip, and rake appropriate to the large events. We evaluate whether these stress changes brought a given large earthquake closer to, or farther from, failure. It was found that each of the large events occurred in regions of increased calculated Coulomb stress. Moreover, the majority of smaller events for which reliable fault-plane solutions are available were also located in areas of positive ΔCFF. By extending the calculations to 2020, and assuming that no additional large (M>=7.0) earthquake occurs between 1999 and 2020, possible sites of future large earthquakes are identified.

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