Monday, March 14, 2011
By Bob Hennelly
The
Ramapo Fault is the longest fault in the Northeast that occasionally
makes local headlines when minor tremors cause rock the Tri-State
region. It begins in Pennsylvania, crosses the Delaware River and
continues through Hunterdon, Somerset, Morris, Passaic and Bergen
counties before crossing the Hudson River near Indian Point nuclear
facility.
In
the past, it has generated occasional activity that generated a 2.6
magnitude quake in New Jersey’s Peakpack/Gladstone area and 3.0
magnitude quake in Mendham.
But
the New Jersey-New York region is relatively seismically stable
according to Dr. Dave Robinson, Professor of Geography at Rutgers. Although it does have activity.
„There
is occasional seismic activity in New Jersey,“ said Robinson. „There
have been a few quakes locally that have been felt and done a little bit
of damage over the time since colonial settlement — some chimneys
knocked down in Manhattan with a quake back in the 18th century, but
nothing of a significant magnitude.“
Robinson said the Ramapo has on occasion registered a measurable quake but has not caused damage: „The
Ramapo fault is associated with geological activities back 200 million
years ago, but it’s still a little creaky now and again,“ he said.
„More
recently, in the 1970s and early 1980s, earthquake risk along the
Ramapo Fault received attention because of its proximity to Indian
Point,“ according to the New Jersey Geological Survey website.
Historically,
critics of the Indian Point Nuclear facility in Westchester County, New
York, did cite its proximity to the Ramapo fault line as a significant
risk.
„Subsequent
investigations have shown the 1884 Earthquake epicenter was actually
located in Brooklyn, New York, at least 25 miles from the Ramapo Fault,“
according to the New Jersey Geological Survey website.
No comments:
Post a Comment