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November 30, 2010

Mag. 3.9 quake reported off Delmarva

New quake mapThe U.S. Geological Survey is reporting a Mag. 3.9 undersea earthquake at about 10:45 a.m. Tuesday, centered off the continental shelf 181 miles southeast of New York City. That's roughly 200 miles east northeast of Ocean City, MD.

The tremor occured an estimated 5 km beneath the ocean bottom. It was reportedly felt by residents of Long Island. Anyone on Delmarva feel this one? Leave a comment and let us know.

UPDATE: The USGA has revised the initial report. Geologists now say the quake was 122 miles east southeast of New York City, and 189 miles northeast of Ocean City, Md., at the edge of the continental shelf and 6 km beneath the surface.

(USGS map)

Posted by Frank Roylance at 11:17 AM | | Comments (12)
Categories: Earthquakes


Was sitting in my office when my chair started to rock back and forth on its wheels. Thought there was an explosion in the building at first, lasted 3 or 4 seconds. I was in Bay Shore Long Island in New York.

I live in dix hills long island and i was sitting on my computer chair watching sportscenter when all of a sudden my monitor started shaking and the empty poland spring bottle shook right off my desk, i knew it was an earthquake and a first for me..pretty exciting since it was not anything to big at all

I thought it was my wife running thru the house again. Sorry honey for yelling at you!

I am in Smithtown, Long Island and I felt my house vibrate and shudder for about 10 0r 15 seconds. Not sure about these other people with water bottles and chairs rolling....come wasn't THAT strong!!

We heard a large unexplained explosion type sound at 10:45 this morning. it sounded as it came out of the East. We are located in Forest Hill, Maryland. Several large murmerations of Starlings and a large skein of Geese took flight immediately after the noise. Geese are not currently in season, so it left us here at work wondering.
is it possible this is more than a concidence?

FR: Seems unlikely. We're a long way from what was a relatively small undersea tremor to hear anything. More likely some kind of testing at Aberdeen Proving Ground.

I am in Forest Hill, and we heard (and felt) what was a big boom, are you sure that these cannot be related....i just heard it again...that was strange. Maybe not, unless there was another earthquake.

How well do you suppose off shore turbines and under sea tremors will mix?

FR: No worse than those on shore, I suppose. Lots of wind turbines in California. And these seem to be pretty rare events. I can't remember another one off the US east coast.

@ Ajax eastman........if they can withstand 60 ft waves during a nor' easter they can surly withstand a measly little tremor.

I was kneeling on the floor, writing on a table in Virginia near the coast when I mentioned to a co-worker that that table and floor were vibrating. Who would have thought it was a small earthquake?

We were at the Nabb Research Center and felt the whole building begin to roll back and forth like on a the ocean.

We were at the Nabb Research Center and felt the whole building begin to roll back and forth like on a the ocean.

I was out in my garage at about 1:55 and the ladder started to shake and the bike hanging up started to sway. I also felt rather unstable for a few seconds. Anything happen at this time near delmarva??

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About Frank Roylance
This site is the Maryland Weather archive. The current Maryland Weather blog can be found here.
Frank Roylance is a reporter for The Baltimore Sun. He came to Baltimore from New Bedford, Mass. in 1980 to join the old Evening Sun. He moved to the morning Sun when the papers merged in 1992, and has spent most of his time since covering science, including astronomy and the weather. One of The Baltimore Sun's first online Web logs, the Weather Blog debuted in October 2004. In June 2006 Frank also began writing comments on local weather and stargazing for The Baltimore Sun's print Weather Page. Frank also answers readers’ weather queries for the newspaper and the blog. Frank Roylance retired in October 2011. Maryland Weather is now being updated by members of The Baltimore Sun staff

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