The Bible tells of earthquakes splitting open the hills of this holy city with apocalyptic fury, adding to the mayhem of battles and punctuating Jesus' crucifixion.Now, a geological survey says the heart of biblical narrative, Jerusalem's walled Old City, would be among the worst hit parts of the city in the event of another earthquake because it rests on layers of debris, not solid rock.A natural disaster in the Old City could also bring devastating political aftershocks because it is the fiery heart of the conflict between Israelis and Palestinians.The three-year study, conducted by the Geological Survey of Israel and released this week, found that the Old City is more at risk than modern neighborhoods because of its ancient construction and the underground layers of shifting debris left behind by ransacking armies, said Amos Bein, the center's director."The layer below is not made of solid rock, but rather a kind of rubble," Bein said. Those weak foundations could magnify an earthquake's seismic wave, he said.Researchers used computers to map Jerusalem's topography, geology, soil and the Old City's subterranean labyrinth of cisterns and tunnels.

Most at risk, the report says, is the Old City and the 11-acre elevated plaza housing two major mosques, including the gold-capped Dome of the Rock.The site is known to Muslims as the Al Aqsa Mosque compound and to Jews as the Temple Mount — once home to the biblical Temples. Jews pray at one of the compound's outer walls, a remnant of the Temple complex — the Western Wall.The report urges Jerusalem's municipal planners to identify and reinforce weak structures.


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