It was 04:17 local time when Erdem, asleep at his home in Gaziantep, southern Turkey, was shaken from his sleep by one of Turkey's biggest-ever earthquakes.
"I have never felt anything like it in the 40 years I've lived," he said. "We were shaken at least three times very strongly, like a baby in a crib."
People went to their cars to escape the damaged buildings. "I imagine not a single person in Gaziantep is in their homes now," Erdem said.
More than 130 miles west, in Adana, Nilüfer Aslan was convinced he and his family would die when the quake shook their fifth floor apartment.
"I have never seen anything like this in my life. We swayed for close to one minute," he said.
"[I said to my family] 'There is an earthquake, at least let's die together in the same place'... It was the only thing that crossed my mind."
When the quake paused, Aslan fled outside - "I couldn't take anything with me, I'm standing outside in slippers" - to find that four buildings surrounding his own had collapsed.
In Diyarbakir, 300 miles east, people rushed into the streets to help rescuers.
"There was screaming everywhere," one 30-year-old man told Reuters. "I started pulling rocks away with my hands. We pulled out the injured with friends, but the screaming didn't stop. Then the [rescue] teams came."
Elsewhere in the city, Muhittin Orakci said seven members of their family were buried in the rubble.
"My sister and her three children are there," he told AFP. "And also her husband, her father-in-law and her mother-in-law."
In Syria, a large number of buildings collapsed in Aleppo, around a two-hour drive from the epicentre. Health director Ziad Hage Taha said wounded people were "arriving in waves" following the disaster.
Özgül Konakçı, a 25-year-old who lives in Malatya, said the aftershocks - and freezing weather - made things worse.
"It's very cold and it's snowing right now," she told BBC Turkish. "Everyone is on the streets, people are confused about what to do. Just before our eyes, the windows of a building exploded due to aftershocks."
As a second earthquake occurred at 10:24 GMT, a cameraman for Turkish news channel A Haber could be seen running from a collapsing building inas screams were heard in the background.
"As we were heading to the rubbles to [film] search and rescue efforts, there were two consecutive aftershocks with a loud noise," reporter Yuksel Akalan said on air.
"The building you are seeing on my left was brought down to earth. There are a lot of dust. A local resident is coming and he is covered in dust. A mother is taking her children [away]."
Ozgul Konacki, 25 and from Malatya, spoke while waiting outside with her family, after seeing buildings around them collapse.
"Some people wanted to go back to their houses because it was too cold," she said. "But then we felt strong aftershocks and they were out again."
Ismail Al Abdullah - a rescuer from Syrian humanitarian group, White Helmets - has been working in Sarmada to rescue to survivors, a town near the border with Turkey.
"Many buildings in different cities and villages in north-western Syria collapsed, destroyed by this earthquake," he said.
"We need help. We need the international community to do something, to help us, to support us. North-western Syria is now a disaster area. We need help from everyone to save our people."
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