Source and short-distance propagation of the July 9, 1956 southern Aegean tsunami
1985; Elsevier BV; Volume: 65; Issue: 3-4 Linguagem: Inglês
10.1016/0025-3227(85)90064-7
ISSN1872-6151
AutoresB. C. Papazachos, C. Koutitas, P. M. Hatzidimitriou, B. G. Karacostas, Ch. A. Papaioannou,
Tópico(s)High-pressure geophysics and materials
ResumoProperties of the tsunamigenic source as well as the attenuation of the tsunami intensities of the large tsunami of July 9, 1956 in the southern Aegean are investigated. This tsunami was generated by a shallow earthquake with a surface wave magnitude of 7.5 which was caused by a normal fault. Fault-plane solution, isoseismal lines and bathymetric information indicate that the tsunamigenic source had an elliptical shape with the large axis equal to 110 km and oriented in an ENE—WSW direction. This is also the strike of the normal fault which produced the earthquake and it is probable that the southern block was downthrown. Linear relations between: (a) the tsunami intensity and the epicentral distance for distances up to 330 km; (b) the observed tsunami height and the epicentral distance; and (c) the tsunami height and intensity, have been determined. This information, concerning the source parameters of tsunamis and the attenuation of the tsunami intensity and tsunami height with distance, are of great importance for determining the tsunami hazard in this area.
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