SUPNAF project : Seismicity of the North Anatolian Fault, Turkey

Links between fault complexity, seismicity swarming and
failure rate : the importance of the study of the North Fault
Anatolian woman

Are there two types of fault : one with a simple structure (unbranched, linear segments), with little seismicity except in the vicinity of the nucleation zone (precursors) and a supershear propagation of the failure with the possibility of partitioning the displacement, the other with a complex structure (multi-scale), much seismicity (especially replicas) and a propagation of the sub-Rayleigh failure ?

This is the problem that is proposed to be addressed in this project by studying one of the best possible sites : the western part of the northern Anatolian fault (from the Marmara Sea to the Izmit-Duzce region, epicentres of the 1999 earthquakes). This site has been very extensively studied and therefore a lot of information is available. There is a very dense seismological network on land and OBS campaigns at sea either recently carried out or planned. Two very large events have occurred recently, providing unique datasets. The stakes remain high since the city of Istanbul is particularly threatened.

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