Scientific & Educational Activity Scientific Missions Αποστολή στην Ιαπωνία
Ιαπωνία – Μάρτιος 2011
Σεισμός στην Ιαπωνία – Μάρτιος 2011 Print
Tuesday, 03 May 2011 00:00


Ιαπωνία - Ένας χρόνος μετά Print

Earthquake Mw 9.0, Tsunami XII ITIS-2012, Fukushima Daiichi N.P.P. Mega-NaTech Accident INES 7


Παρουσίαση των αποτελεσμάτων του σεισμού Tohoku, Mw 9.0 (11 Μαρτίου 2011) της Ιαπωνίας Print


Seismotectonic Setting


Earthquake Damage


Secondary Geodynamic Phenomena - Fires
Fukushima Power Plant Failure


Search and Rescue Operations


Impact on Environment, Life Lines & Economy


Regional Impact - Part 1


Regional Impact - Part 2

Φωτογραφικό Υλικό Print

Επιλεγμένες εικόνες από το διαδίκτυο Print

Περίληψη της εργασίας με τίτλο "Critical Factors for Run-up and Impact of the Tohoku Earthquake Tsunami" Print

Lekkas E., Andreadakis E., Kostaki I., Kapourani E.

The earthquake of March 11 of magnitude 9 offshore Tohoku, Japan, was followed by a tsunami wave with particularly destructive impact, over a coastal area extending approx. 850km along the Pacific Coast of Honshu Island. First arrival times and measurements and maximum height were recorded by the Japanese monitoring system (wherever there was no failure of the equipment). The maximum run-up is well evident in satellite images available through USGS, Google and other institutes. Moreover, personal observations of Prof. Lekkas were made during a field survey in March 2011. The results of the study of the tsunami impact and run-up show the variety of factors affecting the run-up, creating zones with similar phenomena, but also specific locations where run-up exceeds by far the run-up zone maximum values. This differentiation, observed also in the past by other authors, is here attributed to the general orientation of the coast, the distance from the tsunami generation area, bathymetry offshore, the coastline morphology and land geomorphology. In certain cases that funnelling and reflection effects in narrow gulfs parallel to the tsunami propagation vector were combined with narrow valleys onshore, peak run-up exceeded 20m, or even 40m (Miyagi coastline, Ogatsu, Onagawa, etc).

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Περίληψη της εργασίας με τίτλο "The Mw=9.0 Tohoku Japan Earthquake (March 11, 2011) Tsunami impact on structures and infrastructure" Print

Lekkas E., Andreadakis, E., Alexoudi, V., Kapourani, E., Kostaki, I.

The March 9th 2011 earthquake of Mw=9, that occurred offshore NE Japan, triggered major tsunami waves that affected almost all of the NE coast of Japan and caused massive casualties and enormous disasters. On the affected areas great damages were observed on structures and infrastructure, not because of the earthquake, but mainly because of the tsunami waves that literally swept whole residential, industrial and rural areas. Below, preliminary field observations on the behaviour of different types of structures, ports and critical infrastructure in general are presented and the causes of disaster are analyzed. Finally, comparisons are made with the damage caused by the tsunami waves of Indian Ocean of December 26th, 2004.

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