What caused the December 26 2004 earthquake?
What caused the December 26 2004 earthquake?
The tsunami from the 2004 M=9.1 Sumatra-Andaman earthquake was primarily caused by vertical displacement of the seafloor, in response to slip on the inter-plate thrust fault (see Tectonics section above).
How was the tsunami warning system created?
Official tsunami warning capability in the U.S. began in 1949 as a response to the 1946 tsunami generated in the Aleutian Islands that devastated Hilo. The U.S. federal government already had a sizable piece of property in ʻEwa Beach to house the Honolulu Geomagnetic Observatory.
When did India adopt tsunami warning?
India adopt the International Tsunami Warning System in 2006. India agreed to “Ocean Tsunami Warning System” in a United Nations Conference held in January 2005 in Kobe, Japan. As an initiation towards an International Early Warning Programme after the disastrous tsunami of 2004 due to Indian Oceean earthquake.
Why did the tsunami in 2004 happen?
It was a powerful megathrust quake, occurring where a heavy ocean plate slips under a lighter continental plate. The quake caused the ocean floor to suddenly rise by as much as 40 meters, triggering a massive tsunami.
Could Australia be hit by a tsunami?
Australia is relatively lucky when it comes to tsunamis. We sit in the middle of a tectonic plate, some distance from the nearest subduction zones. Tsunamis created by subduction zone earthquakes at these trenches have several hundred to several thousand kilometres of ocean to travel across before reaching our shores.
What it looks like before a tsunami?
As a tsunami approaches shorelines, water may recede from the coast, exposing the ocean floor, reefs and fish. 3. Abnormal ocean activity, a wall of water, and an approaching tsunami create a loud “roaring” sound similar to that of a train or jet aircraft.
Does the Indian Ocean now have a tsunami warning system?
The system became active in late June 2006 following the leadership of UNESCO. It consists of 25 seismographic stations relaying information to 26 national tsunami information centers, as well as six Deep-ocean Assessment and Reporting of Tsunami (DART) buoys.
