An estimated $23 million damage was caused by one of the great earthquakes in United States history in 1886. Charleston, South Carolina, and nearby cities suffered most of the damage, although points as far as 160 kilometers away were strongly shaken. Many of the 20 earthquakes of intensity V or greater (Modified Mercalli scale) that centered within South Carolina occurred near Charleston. A 1924 shock in the western part of the State was felt over 145,000 square kilometers. Several earthquakes outside the State borders were felt strongly in South Carolina.
The August 31, 1886, Charleston earthquake was initially perceived in that city as a barely perceptible tremor, then a sound like a heavy body rolling along; the sound became a roar, all movable objects began to shake and rattle, and the tremor became a rude, rapid quiver. The first shock was at 9:51 p.m. and lasted 35 to 40 seconds. A strong aftershock occurred 8 minutes later. Six additional shocks followed during the next 24 hours. Few buildings in the city escaped damage and many were totally destroyed. Chimneys of at least 14,000 houses were destroyed in Charleston. The maximum intensity has been estimated at X.
An estimated 60 persons were killed by falling buildings and many more were injured. Within a radius of 160 kilometers, the cities of Columbia, South Carolina and Augusta and Savannah, Georgia, also experienced damage. The total area affected by this earthquake covered more than 5 million square kilometers and included distant points such as New York City, Boston, Milwaukee in the United States and Havana, Cuba, and Bermuda. All or parts of 30 states and Ontario, Canada, felt the principal earthquake.
Two strong aftershocks were reported on October 22, 1886, and another on November 5. The first of these was felt (intensity VI) at Charleston, at Atlanta and Augusta, Georgia, and at other towns. The second shock was intensity VII at Summerville. which received significant damage from the August 31 earthquake. Another tremor caused intensity VI effects on November 5 at Charleston and was felt over the same area as the previous aftershocks. The total felt area covered approximately 78,000 square kilometers.
On January 23, 1903, houses were shaken strongly (intensity VI) in the area of the South Carolina - Georgia border near Savannah. Intensity IV - V effects were noted at Charleston, III - IV at Columbia, and III at Augusta, Georgia.
A moderate shock affected Charleston, Augusta, and Savannah on April 19, 1907. Dishes rattled and objects were thrown from shelves throughout the 26,000 square kilometer area. A somewhat stronger earthquake caused some damage to chimneys (intensity VII) at Summerville on June 12, 1912. The shock was felt at Charleston with intensity VI and also was felt as far as Brunswick and Macon, Georgia; Greenville, South Carolina, and Wilmington, North Carolina, an area of about 90,000 square kilometers.
The Union County area was shaken with an intensity VI - VII earthquake about 6 months later (January 1, 1913). At Union, cracks appeared in many brick buildings and many chimneys were damaged. The total felt area, roughly elliptical in shape, covered approximately 111,000 square kilometers.
Another earthquake affected the Summerville area on September 22, 1914. Pictures on walls were displaced (intensity V). The shock was preceded by a noise like a train approaching from a distance. The shock was felt (intensity IV) at Charleston and with less intensity at Augusta, Macon, and Savannah, Georgia, an area of about 78,000 square kilometers.
Pickens County was the apparent center of an October 20, 1924, earthquake which shook most of South Carolina and western North Carolina, northeastern Georgia, and eastern Tennessee. The area affected was approximately 145,000 square kilometers. Highest intensities were reported at Pickens, Walhalla, Brevard, and Hendersonville, North Carolina. Buildings were shaken, and furniture was overturned (intensity V). A loud roar accompanied the shock.
On July 26, 1945, an earthquake centered in the vicinity of Lake Murray, about 50 kilometers west of Columbia, was felt over 65,000 square kilometers, including part of Georgia, North Carolina, and Tennessee. No damage was noted and only intensity IV - V effects were observed in the epicentral region.
Moderately strong shocks occurred near Charleston on November 19, 1952, August 3, 1959, March 12, 1960, July 23, 1960, and October 23, 1967. The 1959 disturbance caused minor damage (intensity VI) at Charleston, Summerville, and Wadmalaw Island. Chimneys were damaged, plaster cracked and fell, walls cracked, and objects fell from shelves. Cracked plaster was also reported from Columbia, Johns Island, Meggett, and Pierpont in South Carolina and from Augusta, Georgia. The total affected area was about 65,000 square kilometers. The other earthquakes did not exceed intensity V. The epicenter for the March 12, 1960, tremor was off the coast of South Carolina; Augusta, Georgia, and Greensboro, North Carolina, also felt this shock.
Moderate earthquakes also awakened many residents (intensity V) at Anderson on October 20, 1958, and caused minor damage (cracked and fallen plaster - intensity V) at Chesterfield on October 26, 1959. Another shock on April 20, 1964, was felt strongly (intensity V) at Gaston and Jenkinsville. Places in Fairfield, Florence, Lexington, and Richland Counties also reported the tremors. Several windows were broken in Bowman and Orangeburg (intensity V) from a magnitude 3.4 earthquake on May 19, 1971. Two small shocks, about 3 hours apart, were felt in western South Carolina July 13, 1971. The main shock at 7:42 a.m. edt was felt over approximately 5,200 square kilometers, including two places in Georgia. The tremor was felt by all in Newry; many were frightened by the loud Earth noises (intensity VI), hanging objects swung violently, and furniture shifted.
Abridged from Earthquake Information Bulletin, Volume 8, Number 6, November - December 1976, by Carl A. von Hake.
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