A lower-crustal event in the northeastern Mediterranean: The 1998 Adana Earthquake (Mw=6.2) and its aftershocks

Details A lower-crustal event in the northeastern Mediterranean: The 1998 Adana Earthquake (Mw=6.2) and its aftershocks A lower-crustal event in the northeastern Mediterranean: The 1998 Adana Earthquake (Mw=6.2) and its aftershocks

Aug 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.2361a&link_type=abstract

Geophysical Research Letters, Volume 27, Issue 16, p. 2361-2364

Physics

5

Seismology: Continental Crust, Seismology: Earthquake Parameters, Seismology: Seismicity And Seismotectonics, Tectonophysics: Continental Neotectonics

Scientific paper

We analyze the main and aftershocks of the June 27, 1998 Adana earthquake using data from the short-period Cilician seismograph network in order to investigate the seismotectonics of the northeastern Mediterranean region. The mainshock is found to have a pure left lateral strike-slip mechanism (strike=50°, dip=85°, rake=10°, M0=3.63×1018Nm). The inferred strike direction of 50°N closely aligns with the surface trend of the Göksun Fault Zone (GFZ). The depth and size of the mainshock and the distribution of the aftershocks indicate that the rupture nucleated within the lower crust, and did not extend to shallower zones. This seismicity pattern indicates that these events are associated with actively interacting African and Anatolian lithospheres in a strike-slip manner at depth. Thus, we propose that the southern segment of the GFZ belongs to the diffuse Africa-Anatolia plate boundary and plays a major role in the plate kinematics of the northeastern Mediterranean.

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