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Coseismic Slip Distribution of the 12 June 2017 M w = 6.3 Lesvos Earthquake and Imparted Static Stress Changes to the Neighboring Crust
Author(s) -
Chousianitis Konstantinos,
Konca A. Ozgun
Publication year - 2018
Publication title -
journal of geophysical research: solid earth
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.983
H-Index - 232
eISSN - 2169-9356
pISSN - 2169-9313
DOI - 10.1029/2018jb015950
Subject(s) - geology , slip (aerodynamics) , seismology , aftershock , epicenter , induced seismicity , seismic moment , amplitude , geodesy , crust , geophysics , fault (geology) , physics , quantum mechanics , thermodynamics
We jointly inverted near‐source data consisting of static GPS displacement vectors and 1‐Hz global positioning system time series and inferred the slip model of the 12 June 2017 M w = 6.3 Lesvos earthquake. The slip distribution is characterized by one slip patch with peak amplitude 1 m that released the entire seismic moment and is located 12 km northwest of the epicenter. The unilateral rupture propagation along with the observed damage distribution implies source directivity. Coulomb stresses determined from the coseismic slip distribution highlighted that the entire aftershock sequence is explained by stress transfer and no further spatial migration of seismicity is justified. The results also underline a triggering relationship between pure extensional structures with smaller strike‐slip faults that coexist in the area. The main shock gave evidence for the presence of an active diffuse microplate boundary between Lesvos Island and Karaburun Peninsula and demonstrated that Coulomb stress calculations are reliable in such tectonic boundaries.