However, the tiny red dots in the built-up areas are all collapsed buildings. The image is created by superimposing a photo from after the earthquake over a photograph taken beforehand. A total of , buildings were damaged in the earthquake and more than , of them either collapsed or became uninhabitable due to heavy damage.
An elderly Istanbulian man searches for whatever he can rescue from the remains of his five-story apartment building which was flattened by a powerful earthquake in Istanbul early August 17, Residents of Izmit search for survivors in a destroyed house after a heavy quake hit western Turkey in the early morning hours of August 17, Four people died in this building and three were rescued. Residents of Izmit, some 90 kilometers from Istanbul search for victims in a collapsed apartment building after a heavy quake hit western Turkey early morning, August 17, Turkey and Greece both sit on fault lines and earthquakes are common.
In Izmir, Turkey's third largest city with the population of nearly three million, many people were seen running out into the streets in panic and fear after the quake struck. At least 20 buildings collapsed. Videos have been posted on social media appearing to show the moment one multi-storey building went down, the BBC's Orla Guerin in Istanbul reports.
Other footage shows local people scrambling over rubble looking for survivors. There were reports of flooding in the city after the sea level rose, and some fishermen are said to be missing. Running out of the house with my children was like a drunken wobble," Chris Bedford, a retired British teacher who lives in Urla, west of Izmir, told the BBC. One of the 20 confirmed victims drowned, the Turkish emergencies agency said.
Yasar Keles, an official in Sigacik, near Izmir, told BBC Turkish that a person died after their wheelchair was hit and overturned by the rising water. Officials later said that 70 people had been rescued from under the rubble. Turkish President Recep Tayyip Erdogan said the government would help those affected by the quake "with all the means available to our state".
In Greece, two teenagers were killed when a wall collapsed on Samos. Eight people were injured across the island. A mini-tsunami flooded the port of Samos and a number of buildings were damaged.
Greek officials put the magnitude of the tremor at 6. He said it was the biggest tremor to have hit the island since Fareid Atta, another Samos-based journalist, told the BBC that the damage was "quite extensive along the seafront" of the island's main town.
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This phase, which was characterized by a distinctive seismic signal, corresponds to slow slip at depth along the fault. Detecting it in other earthquakes might make it possible to predict some types of earthquakes several tens of minutes before fault rupture.
A large earthquake has a magnitude of 7 or more on the Richter scale. In the twentieth century, nine earthquakes of this type occurred along the North Anatolian fault, one of the most active large faults in the world. The Izmit earthquake had a magnitude of 7. It was caused by a strike-slip fault that separates the Anatolian plate, which is moving westwards, from the eastward-moving Eurasian plate, and was one of the best-recorded large earthquakes in the world. Since , a team of CNRS researchers, in collaboration with Turkish seismologists, has been studying this earthquake-prone region.
The scientists recently analyzed seismic recordings obtained close to the epicenter of the Izmit earthquake. They detected a highly distinctive seismic signal that had never been previously observed, just before the fault ruptured. More specifically, the recordings revealed a succession of repeated similar vibrations that lasted for a period of 44 minutes. Although this ground motion was almost continuous, it was too faint to be felt by the population.
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