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Kain99
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With all of the recent east coast earthquakes, I found this information on earthquakes in Maryland pretty interesting. Detailed information, great graphs!
Forty-seven earthquake epicenters have been reported within Maryland's borders. The accuracy and precision of these epicenter determinations is such that a few of the 47 may actually have occurred in adjacent states, and for the same reason it is conceivable that a few of the closer out-of-state earthquakes could have occurred within Maryland. For example, not included in the list of 47 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.
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Forty-seven earthquake epicenters have been reported within Maryland's borders. The accuracy and precision of these epicenter determinations is such that a few of the 47 may actually have occurred in adjacent states, and for the same reason it is conceivable that a few of the closer out-of-state earthquakes could have occurred within Maryland. For example, not included in the list of 47 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.
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