In February scientists revised the estimate of the magnitude to 9. A study estimated a magnitude of Mw 9. This quickly elevated the height and increased the speed of waves, destroying the nearby Indonesian town of Lhoknga. The Sumatra earthquake is believed to have been a foreshockpreceding the main event by over two years.
Tsunami SumatraAndaman Indonesia Sumatra-Andaman Earthquake and Tsunami The earthquake that generated the great Indian Ocean tsunami of was an undersea megathrust earthquake that occurred at 7: It was caused by subduction with an epicentre off the west coast of the Indonesian island of Sumatra.
The quake itself is known by the scientific community as the Sumatra-Andaman earthquake. The resulting tsunami is given various names, including the "Boxing Day tsunami". With a magnitude of Mw 9. The earthquake had the longest duration of faulting ever observed, between 8.
It caused the entire planet to vibrate as much as 1 centimetre 0.
On 26 December , a magnitude earthquake ( N, E, depth 30 km) occurred off the coast of northern Sumatra, Indonesia. The tsunami generated by the earthquake was recorded nearly world-wide and killed more people than any other tsunami in recorded history, almost , missing and presumed dead. The December 26, Sumatran Tsunami On th e morning of December 26, a magnitude earthquake struck off the Northwest coast of the Indonesian island of Sumatra. The earthquake resulted from complex slip on the fault where the oceanic portion of the Indian Plate slides under Sumatra, part of the Eurasian Plate. Analysis of seismograms from the December 26, Sumatra earthquake that generated the devastating tsunami shows that it was much bigger than previously thought and explains in part why the tsunami was so destructive.
According to the U. While Japan may have the longest recorded history of tsunamis, the sheer destruction caused by the Indian Ocean earthquake and tsunami event mark it as the most devastating of its kind in modern times.
Within hours of the earthquake, killer waves radiating from the epicentre slammed into the coastline of 11 Indian Ocean countries, damaging countries The sumatran tsunami of december 26 east Africa to Thailand, killing overpeople in fourteen countries, and inundating coastal communities with waves up to 30 meters 98 ft high.
It was one of the deadliest natural disasters in recorded history. Indonesia was the hardest-hit country, followed by Sri Lanka, India, and Thailand. Woman in a tsunami-damaged village in Tamil Nadu, India, waving for assistance from a hovering helicopter, Dec.
Despite a lag of up to several hours between the earthquake and the impact of the tsunami, nearly all of the victims were taken completely by surprise because there were no tsunami warning systems in the Indian Ocean to detect tsunamis or to warn the general populace living around the ocean.
The Sumatra-Andaman Islands Earthquake on December 26,happened in an area with high population densities along the coasts where it struck with maximal force see red colours in the simulated image below.
Yet some areas were more so affected than others.
Thus people lived dangerously close to the water and often on ships that would not be seaworthy in areas where tropical cyclones are common. But from scientific observations we know today that tides and hurricanes are able to modify the coast in ways that may reduce tsunami damage.
Combined with waves, and particularly those from storms, tides can erode the shoreline out, until a shore profile results that resists tsunamis. On such coasts, a tsunami won't be able to run inland as far as it did in Aceh, the region located on the northern tip of the island of Sumatra, where approximatelyIndonesians were killed or went missing in the disaster, and approximatelywere left homeless.
That is also the reason why the March tsunami in Japan caused predictably much damage where the coast had never experienced either substantial tides or storms. The aftermath of the December tsunami in Aceh, Indon. People running from the shore shouted that the sea was rising.
Mrs Rinaldiana and her family sought shelter in a crowded two-storey house, but it was soon destroyed. Mrs Rinaldiana was knocked unconscious. When she came to, the wave was carrying her and she was surrounded by debris. I thought it was the end of the world," she said.
Satellite image of Banda Aceh, Indon, showing the devastation caused by the tsunami of December The great M earthquake of December 26, , which produced a devastating tsunami, ruptured much of the boundary between Myanmar and Simeulue Island offshore Banda Aceh.
Immediately to the south of the great earthquake, the M Nias Island earthquake of March 28, ruptured a km section between Simeulue and the . The Sumatran earthquake and tsunami, which are feared to have caused more than , deaths, struck on December 26, The moment estimate (M0 = 5 dyne-cm), based on the measurement of split modes of free oscillations of Earth, is about three times larger than the 4 5 dyne-cm measured from traditional long-period surface waves.
The great Sumatran earthquake of December 26, is the largest earthquake to have occurred in the past 40 years and is the first magnitude 9 earthquake to have occurred during the satellite era of geophysical measurements, thereby providing an unprecedented.
On 30 December , four days after the tsunami, Terra Research notified the India government that its sensors indicated there was a possibility of to magnitude tectonic shift in the next 12 hours between[Sumatra and New Zealand.
82 Effects of the December 26, Sumatra Earthquake and Tsunami on Physical Infrastructure vary between m to m from the ground.
The building inventory in Patong Beach consisted of a. On the morning of December 26, a magnitude earthquake struck off the Northwest coast of the Indonesian island of Sumatra. The earthquake resulted from complex slip on the fault where the oceanic portion of the Indian Plate slides under Sumatra, part of the Eurasian Plate.