Edmonton Astrological Society Since 1977
On December 26, 2004 an undersea earthquake, magnitude 9.0 in the Indian Ocean, generated tsunamis that caused one of the deadliest natural disasters in modern history. This rare type of earthquake, known as a mega-thrust, struck at 07:58:53 (local time) just off the north-western coast of the island of Sumatra, Indonesia. It was the largest earthquake on Earth since the 9.2 magnitude Good Friday Earthquake off Alaska in 1964, and tied for fourth largest since the establishment of accurate global seismographic record keeping by 1900. These tsunamis were the deadliest by far in all of recorded history. They devastated the shores of Indonesia, Sri Lanka, India, Thailand and other countries with waves up to 15 meters (50 feet) in height. Even the east coast of Africa (especially Somalia) was hit, despite being located 4,500 km (2,800 miles) or more west of the epicentre. The plight of the many affected people prompted a widespread humanitarian response.