• Pasadena Analysis of Eastern Quake


    PASADENA (CNS) – The magnitude-5.8 earthquake that rattled the East
    Coast today is an unusual occurrence and the largest temblor to hit the region
    since the late 19th Century, but the area has had its share of quakes in the
    past, seismologists at the U.S. Geological Survey in Pasadena said today.
    The quake struck just before 2 p.m. Eastern time, centered 38 miles
    northwest of Richmond, Va. The quake was felt up and down the East Coast –
    most notably in Washington, D.C., but also as far south as Atlanta.
    “That’s a feature of earthquakes on the East Coast,’ USGS seismologist
    Lucy Jones said. “The rocks there are colder and older and harder than the
    rocks in California, do a better job of transmitting energy. So the same size
    earthquake is felt over a much wider area along the East Coast.
    “It does sound like there has been some damage,’ she said. “I would
    expect that most of the damage would be down in the area of the epicenter, east
    of Charlottesville and west of Richmond.’
    The quake came as a definite surprise to people up and down the East
    Coast, but the area does have a history of seismic activity.
    “This event happened within the Central Virginia Seismic Belt, and
    there have been over a couple hundred earthquakes within that belt since the
    late 70s when they started doing more detailed recording of earthquakes,’ USGS
    geophysicist Ken Hudnut said. “The largest in recent times was a four and a
    half in 2003, but there was one in the late 1800s that may have been a
    magnitude-4.8, so it’s not unprecedented to have earthquakes in this seismic
    belt between Charlottesville and Richmond, but this is the largest within that
    zone.’
    Kate Hutton, a seismologist at Caltech, said today’s quake was the
    largest on the East Coast since 1897, when a magnitude-5.9 quake struck in
    Virginia.
    Jones noted that the USGS headquarters in Reston, Va., was evacuated
    after the quake to be checked for damage.
    “One time, an earthquake there is quite unlikely,’ Jones said. “The
    fact that eventually there’s an earthquake there is not a surprise, because it
    is an area that’s had earthquakes in the past. This is a recognized seismic
    zone, meaning it has had more earthquakes than we normally see out on the East
    Coast.’

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