Methoni Earthquake

On Thursday 14th of February 2008, 10:09 (GMT) an earthquake of magnitude M=6.7 occurred South of Methoni. The epicenter was located 230km south west of Athens. There is one long main source at the Northwestern part of the fault. The rupture has directivity to southeast.



Date Time Latitude(o)  Longitude(o)  Depth(km) Mw Source
14-02-2008 10:09:20.481 36.3029 N 21.6971 E 35.0 6.7 ATHU

                              
Seismicity Seismic Moment Teleseismic Modeling Regional Modeling
Focal Mechanisms Body Wave Inversion Slip Distribution ShakeMap

Seismicity 1964-2008 M>3.9
The location of the main event is presented by a star


 

Seismic Moment and Moment Magnitude Determination
by Spectral Analysis

Mo = 1.5 10**26 Dyne.cm         Mw=6.7


 

Source Papameters Determination
Teleseismic Body Wave Modeling (30 < Δ <90)




 

Source Papameters Determination
Local - Regional Distances




 

Fault Plane Solutions of Large Events (blue) and
Focal Mechanism of Main Event (green)


 

Map of stations and focal mechanism




 

Body Wave Inversion (30 < Δ < 90)
and slip distribution determination




 

Slip Distribution




 

ShakeMap
Peak Ground Velocity (cm/sec)




 

The slip model calculated by Agalos A. email: aagalos@geol.uoa.gr
Earthquake modeled by Moshou Alexandra email: amoshou@geol.uoa.gr

References:

Agalos A., Papadimitriou P. and Makropoulos K.,2007. Source Parameters Estimation from
Broadband Regional Seismograms for Earthquakes in the Aegean Region and the Gorda Plate.
Proceedings of the 11th International Congress Athens, May 2007

Agalos A., Papadimitriou P., Makropoulos K., 2008. Rupture Histories of Strong Earthquakes. 31st General
Assembly of the European Seismological Commission, held at the Creta Maris
Conference Center, Hersonissos, Crete Greece, Book of Short papers, p 9-16.

Bouchon Michel, 1981. A simple method to calculate Green s functions for elastic layered media.
BSSA, 71, 4, 959-971.

Hartzell S. H., and Heaton T. H., 1983. Inversion of strong ground motion and teleseismic waveform
data for the fault rupture history of the 1979 Imperial Valley, California, earthquake. BSSA, 73, 1553_1583.

Moshou A., Papadimitriou P. and Makropoulos K.,2007. Teleseismic Body Wave Inversion.
Proceedings of the 11th International Congress Athens, May 2007

Moshou A., Papadimitriou P., Makropoulos K., 2008. Waveform Inversion using Teleseismic and
Regional Data for Earthquakes that Occurred in Greece. 31st General Assembly of the European
Seismological Commission, held at the Creta Maris Conference Center, Hersonissos, Crete Greece,
Book of abstracts, p 95.

Wessel, P. and W. H. F. Smith., 1991. Free software helps map and display data, EOS Trans. AGU, 72, 441.