Matthew 27:50-51 “And when Jesus had cried out again in a loud voice, he gave up his spirit. At that moment the curtain of the temple was torn in two from top to bottom. The earth shook, the rocks split and the tombs broke open.”
To analyze earthquake activity in the region, geologists studied three cores from the beach of the Ein Gedi Spa adjacent to the Dead Sea. "Varves, which are annual layers of deposition in the sediments, reveal that at least two major earthquakes affected the core: a widespread earthquake in 31 B.C. and a seismic event that happened sometime between the years 26 and 36."
You can find out more about the project and trailer here: http://www.christquake.com/
Interestingly many geologists do confirm a fault line that runs through the Mount of Olives in Jerusalem right next to the temple mount.
In fact when Christ returns the Mount of Olives will split into two sections.
Zechariah 14:4 says, “On that day his feet will stand on the Mount of Olives, east of Jerusalem, and the Mount of Olives will be split in two from east to west, forming a great valley, with half of the mountain moving north and half moving south.”
Also a fault line was discovered under the Seven Arches hotel on the top of the Mount of Olives during the time of it's construction. "Its presence prohibited the Intercontinental Hotel (now called the Seven Arches Hotel) from being built on the brow of the Mount of Olives overlooking Jerusalem as originally planned. It was re-located to the south and built on more stable ground where it stands today."
The Great Vally Rift fault line at the Dead sea runs very close to Jerusalem as shown here. This area is known for it's numerous earthquakes.
