Preliminary Analysis for Characteristics of Strong Ground Motion from Gigantic Earthquakes
نویسندگان
چکیده
The 2011 off the Pacific coast of Tohoku earthquake (Mw9.0), which produced many strong motion records, provides an opportunity to examine the characteristics of strong ground motion from a gigantic earthquake. In this paper, the preliminary analysis of the ground motion attenuation, spectral shape and duration was performed using the selected strong motion records of the earthquake. The results were compared with those from the other gigantic earthquakes such as the 2003 Tokachi-oki (Mw8.3), the 2010 Chile (Mw8.8), the 2001 Peru (Mw8.4) and the 2007 Sumatra (Mw8.4) earthquakes. The attenuation and spectral characteristics of the records from the Mw9.0 earthquake are similar to those from the other gigantic earthquakes. The duration of the records from the Mw9.0 earthquake, however, is much longer than that from the other gigantic earthquakes.
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