TY - JOUR
T1 - The 8 june 2008 Mw6.5 Achaia-Elia, Greece earthquake
T2 - Source characteristics, ground motions, and ground failure
AU - Margaris, Basil
AU - Athanasopoulos, George
AU - Mylonakis, George
AU - Papaioannou, Christos
AU - Klimis, Nikolaos
AU - Theodulidis, Nikolaos
AU - Savvaidis, Alexandros
AU - Efthymiadou, Vicky
AU - Stewart, Jonathan P.
PY - 2010/5
Y1 - 2010/5
N2 - The Mw6.5 Achaia-Elia (Greece) earthquake on 8 June 2008 was a rightlateral strike-slip event on a nearly vertical faul. Moment tensor solutions coupled with geologic structure and aftershock distributions suggest a fault strike of approximately 210° on a previously unmapped fault. Rupture appears to have been concentrated over a 10-25 km depth range and did not break the surface. The northern rupture limit appears to correspond to a NW-striking normal fault near the Kato Achaia coastline. The mainshock was recorded by 27 accelerometers at distances from the surface projection of the fault ranging from approximately 15 to 350 km. The data demonstrate faster distance attenuation than predicted by contemporary Greek ground motion prediction equations (GMPEs). On the other hand, an NGA GMPE generally captures the distance attenuation but shows underprediction bias at short and long periods. Despite the presence of a range of site conditions at recording stations in the city of Patras, we find no obvious effect of sediment depth on response spectra. We show the possible presence of rupture directivity at the north end of this bilateral rupture, but no apparent effect at the southern end. We described several relatively well-documented incidents of nonground failure and ground failure associated with liquefaction/lateral spreading and landslides.
AB - The Mw6.5 Achaia-Elia (Greece) earthquake on 8 June 2008 was a rightlateral strike-slip event on a nearly vertical faul. Moment tensor solutions coupled with geologic structure and aftershock distributions suggest a fault strike of approximately 210° on a previously unmapped fault. Rupture appears to have been concentrated over a 10-25 km depth range and did not break the surface. The northern rupture limit appears to correspond to a NW-striking normal fault near the Kato Achaia coastline. The mainshock was recorded by 27 accelerometers at distances from the surface projection of the fault ranging from approximately 15 to 350 km. The data demonstrate faster distance attenuation than predicted by contemporary Greek ground motion prediction equations (GMPEs). On the other hand, an NGA GMPE generally captures the distance attenuation but shows underprediction bias at short and long periods. Despite the presence of a range of site conditions at recording stations in the city of Patras, we find no obvious effect of sediment depth on response spectra. We show the possible presence of rupture directivity at the north end of this bilateral rupture, but no apparent effect at the southern end. We described several relatively well-documented incidents of nonground failure and ground failure associated with liquefaction/lateral spreading and landslides.
UR - http://www.scopus.com/inward/record.url?scp=77958487357&partnerID=8YFLogxK
U2 - 10.1193/1.3353626
DO - 10.1193/1.3353626
M3 - Article
AN - SCOPUS:77958487357
SN - 8755-2930
VL - 26
SP - 399
EP - 424
JO - Earthquake Spectra
JF - Earthquake Spectra
IS - 2
ER -