Premium
The 2001 Skyros, Northern Aegean, Greece, earthquake sequence: off ‐ fault aftershocks, tectonic implications, and seismicity triggering
Author(s) -
Karakostas V. G.,
Papadimitriou E. E.,
Karakaisis G. F.,
Papazachos C. B.,
Scordilis E. M.,
Vargemezis G.,
Aidona E.
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015814
Subject(s) - aftershock , seismology , geology , sinistral and dextral , foreshock , induced seismicity , tectonics , fault (geology) , strike slip tectonics , intraplate earthquake , seismic hazard , fault plane
The M w = 6.4 July 26, 2001 Skyros (North Aegean, Greece) earthquake struck the submarine western end of Northern Aegean Sea causing damage in the nearby Skyros Island. It occurred on a left‐lateral NW‐SE trending strike slip fault, oriented transverse to the dominant dextral strike‐slip faults that are present in the area, appearing to mark the boundary between them and the E‐W trending normal faults of the Greek mainland. Foreshock activity started 5 days before the mainshock, and intense aftershock activity followed on the main rupture plane and off fault. The seismogenic structure consists of three clusters with different orientation, independent from the known normal and dextral strike‐slip faults. Theoretical static stress changes from the main shock suggests off‐fault aftershock triggering, providing a tool for assessing the seismic hazard ensuing from strong aftershocks far from the main rupture.