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| Icebox Member Since: Nov 2003
Posts: 2,696
| Did the earth move for you?
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| | #2 |
| Jersey attitude. Member Since: Sep 2004 Location: NJ>MD>NJ
Posts: 478
| Nope. Music was too loud between 10:30 and 11:15 this morning for me to hear or feel anything here in the 'dorf. :)
__________________ "If it is within our power to act nobly, it is also in our power to do evil." - Aristotle |
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| | #3 |
| Lord, I apologize. Member Since: Jan 2005
Posts: 1,952
| I told to stop jumping up and down........
__________________ People who want to share their religious and political views with you, almost never want you to share yours with them. unknown |
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| | #4 |
| professional daydreamer Member Since: Mar 2001 Location: Wonderland
Posts: 33,704
| I didn't feel this one. The last one freaked me out, though.
__________________ #### you. I have enough friends. Sugar Gliders are high maintenance. Please do not purchase/adopt before researching. They require a specialized diet, lots of your time, lots of room, and vet bills can be high. They can live to 15+ years. |
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| | #5 | |
| Guest
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| | #6 | |
| 24/7 Single Dad Member Since: Nov 2003 Location: Highway to Hell
Posts: 38,011
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| | #7 | |
| Yo Gabba Gabba Member Since: Oct 2003
Posts: 2,874
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__________________ I'm your huckleberry... | |
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| | #8 | ||
| Yo Gabba Gabba Member Since: Oct 2003
Posts: 2,874
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__________________ I'm your huckleberry... | ||
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| | #9 |
| n/a Member Since: Sep 2002
Posts: 40,841
| Dear Dems, To most people in the United States, damaging earthquakes are a California phenomon, but this is misleading. Even though the greatest seismicity in the United States occurs along the Pacific Coast (especially Alaska and Southern California), major earthquakes have also occurred in the central and eastern U.S. The last earthquake to cause appreciable damage in the eastern United States occurred in 1886 near Charleston, South Carolina. It had an estimated magnitude of 6.5-7, an intensity of X, and was felt over an area of two million square miles. Even in Maryland, the felt intensity from this earthquake was IV to V. Perhaps the greatest seismic event ever to occur in North America in historic times was a series of earthquakes that shook the mid-continent around New Madrid, Missouri in the winter of 1811-1812. Estimates of the magnitude range as high as 8.7; estimated maximum intensity was XII; and the felt area, which included Maryland, was 2 million square miles. Other damaging earthquakes in the eastern U.S. include an intensity VIII event near Boston in 1755 and intensity VI events near New York City in 1737 and 1884. Several earthquakes in adjacent states have been felt in Maryland. Marylanders are more likely to feel one of these out-of-state earthquakes than one within Maryland. As shown by Figure 2, Southwestern Virginia, central Virginia, and the Atlantic seaboard northward from Wilmington, Delaware have significantly more seismic activity than does Maryland. One out-of-state earthquake that was felt in much of Maryland occurred Easter Sunday, April 22, 1984. In fact, it was reported felt in eight states and the District of Columbia, over an area of approximately 19,000 square miles. Centered about 12 miles south of Lancaster, Pennsylvania, this earthquake registered 4.1 on the Richter Scale and had an epicentral intensity of V to VI. Most notable effects in Maryland were in the northeastern part of the state, which generally experienced Modified Mercalli Intensity V effects for example, hanging pictures fell in Conowingo; windows cracked in Elkton and Joppa; and standing vehicles rocked slightly in Union Bridge (Stover, 1988). A 3.0-magnitude tremor four days earlier is considered to have been a foreshock. Ten aftershocks registering 2 to 2.5 Richter magnitude occurred over a four-day period after the April 22 event. The Lancaster earthquake is likely related to Triassic-age structures in the area. As of late 1993, 47 earthquakes had been reported within Maryland’s borders. Over the next ten years, that total reached 61. The accuracy and precision of these epicenter determinations is such that a few of the closer out-of-state earthquakes could have occurred within Maryland and some of those near the state’s boundaries may actually have occurred in adjacent states. For example, not included in the list was a moderate shock that occurred on January 2, 1885 in an area near the Frederick County, Maryland-Loudon County, Virginia border. The maximum intensity was V, with the total felt area covering more than 3,500 square miles. Of the Maryland earthquakes, 2 occurred in the Valley and Ridge Province, 36 were in the Piedmont Province, and 10 were in the Coastal Plain Province. The first reported earthquake to have actually had its epicenter in Maryland occurred south of Annapolis on April 25, 1758, but no record of its strength is known to exist. The shock lasted 30 seconds and was preceded by subterranean noises. Additional felt reports were received from a few points in Pennsylvania (U.S. Geological Survey, 1973). Maryland's strongest confirmed tremor was a 3.1-magnitude event near Hancock, Washington County, in 1978. That perhaps was rivaled by an intensity V event (unknown magnitude) near Phoenix, Baltimore County, in 1939. Earthquakes of such magnitudes or intensities are still considered to be minor, and very seldom result in significant damage or injury. Sincerely, kwillia |
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| | #10 | |
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As for our area -- in 2001 there was a 2.0 and the largest was a 2.7 in 1993 - I was hoping that Elaine could give us some insight on a larger quake, perhaps she spent time in California or something. | |
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