Tectonic Setting of the Andaman Sea The geography of the Andaman Sea and the orientation of the coastline played a significant role in amplifying the impact. However, the recurrence interval for such events is long, which can lead to complacency in regions that have not experienced a major tsunami in living memory.
Thailand Tsunami Trigger 2004: What Caused the Undersea Earthquake
Variability of the Impact It is important to note that the effects were not uniform along the Thai coast. The sudden vertical displacement of the seafloor displaced a massive volume of water, creating a series of waves that radiated across the ocean at high speed.
This variability explains why neighboring resorts could see drastically different levels of damage during the same event. Long-Term Geological Context While the 2004 event was rare in its magnitude, it was not entirely unexpected by geologists.
Thailand Tsunami Trigger 2004: What Caused the Underwater Earthquake
In contrast, locations with open, flat beaches saw the water race far inland, overwhelming hotels, roads, and entire communities. Resorts and villages in areas like Khao Lak and Phuket were directly in the path of these waves, which climbed over beaches and low-lying coastal land with little natural barrier to stop them.
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