Tsunami Science Four Years after the 2004 Indian Ocean Tsunami - Observation and Data Analysis


1. Introduction

During the years following the 2004 Sumatra-Andaman Earthquake and subsequent

Indian Ocean Tsunami (IOT), the world experienced a remarkable series of great

earthquakes. The 2004 event marked the beginning of a series of earthquakes off Sumatra

that included three of the ten largest earthquakes recorded since 1900 ().

During the period 2004–2007, nine earthquakes of magnitude 8 or greater

occurred in the Indian and Pacific Oceans; all of which generated tsunami’s, of which six

were large enough to cause damage. These events coincided with a period of rapid growth in

tsunami science spurred by the IOT disaster, including an expansion in earthquake and

tsunami observation platforms, as well as dramatic improvements in technology and field

techniques. Many observational studies of these and other events were presented in

the session: Tsunami Generation and Hazard, at the International Union of Geodesy

and Geophysics XXIV General Assembly in Perugia, Italy, held in July of 2007. Over





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