by Jessica Dailey, 03/22/11
New
York City may appear to be an unlikely place for a major earthquake,
but according to history, we’re past due for a serious shake. Seismologists
at Columbia University’s Lamont-Doherty Earth Observatory say that
about once every 100 years, an earthquake of at least a magnitude of 5.0
rocks the Big Apple. The last one was a 5.3 tremor that hit in 1884 —
no one was killed, but buildings were damaged.
Any
tremor above a 6.0 magnitude can be catastrophic, but it is extremely
unlikely that New York would ever experience a quake like the recent 8.9
earthquake in Japan. A
study by the Earth Observatory found that a 6.0 quake hits the area
about every 670 years, and a 7.0 magnitude hits about every 3,400 years.
There
are several fault lines in New York’s metro area, including one along
125th Street, which may have caused two small tremors in 1981 and a 5.2
magnitude quake in 1737. There is also a fault line on Dyckman Street in Inwood, and another in Dobbs Ferry in Westchester County. The New York City Area Consortium for Earthquake Loss Mitigationrates the chance of an earthquake hitting the city as moderate.
John Armbruster, a seismologist at the Earth Observatory, said that if a 5.0 magnitude quake struck New York today, it would result in hundreds of millions, possibly billions of dollars in damages.
The city’s skyscrapers would not collapse, but older brick buildings
and chimneys would topple, likely resulting in casualities.
The
Earth Observatory is expanding its studies of potential earthquake
damage to the city. They currently have six seismometers at different
landmarks throughout the five boroughs, and this summer, they plan to
place one at the arch in Washington Square Park and another in Bryant
Park.
Won-Young
Kim, who works alongside Armbuster, says his biggest concern is that we
can’t predict when an earthquake might hit. “It can happen anytime
soon,” Kim told the Metro. If it happened tomorrow, he added, “I would not be surprised. We can expect it any minute, we just don’t know when and where.”
Armbuster voiced similar concerns to the Daily News.
“Will there be one in my lifetime or your lifetime? I don’t know,” he
said. “But this is the longest period we’ve gone without one.”
Images © Ed Yourdon
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