Publication Date:
2021-06-07
Description:
On 8 June 2008 an Mw(NOA)=6.4 earthquake occurred in NW Peloponnesus, western
Greece. This event is the largest strike-slip earthquake to occur in western Greece
during the past 25 years. The hypocentre was determined at 18 km depth beneath village
Mihoi in SW Achaia. No surface rupture was observed. Many rock falls, slides and
liquefaction features have been found as is typical for an earthquake of this size.
Double-difference relocations of 370 aftershocks show a linear pattern of events and
define a clear NE-SW striking mainshock fault plane. The aftershock region extends
approximately 30 km in length, and the width of the surface projection of the
aftershocks is as large as 10 km. The depth of the aftershocks rarely exceeds 22 km.
Analysis of high-rate GPS data showed that station RLS (Riolos) which is located 12.8
km N5°W of the epicentre was displaced co-seismically 7 mm to the North in
agreement with right-lateral kinematics of the rupture. Static (Coulomb) stress transfer
analysis indicates loading of faults near the towns of Patras (north) and Amaliada
(south), respectively. The earthquake put more emphasis on the role of strike-slip fault
in the deformation of western Greece also indicating that seismic strain is partitioned
between strike-slip and normal-slip events due to obliquity of the Nubia (Africa)
subduction and the N-S extension of the overriding Aegean upper plate
Description:
Submitted
Description:
1.9. TTC - Rete GPS nazionale
Description:
JCR Journal
Description:
reserved
Keywords:
earthquake
;
strike-slip
;
aftershoks
;
stress modeling
;
Greece
;
double-difference
;
static displacement
;
active tectonics
;
04. Solid Earth::04.03. Geodesy::04.03.01. Crustal deformations
;
04. Solid Earth::04.03. Geodesy::04.03.06. Measurements and monitoring
;
04. Solid Earth::04.06. Seismology::04.06.04. Ground motion
;
04. Solid Earth::04.06. Seismology::04.06.06. Surveys, measurements, and monitoring
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
manuscript
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