earthquakes in arkansas
The northeast section of Arkansas is located in the New Madrid seismic zone and was seriously affected by great shocks that occurred in that zone, in 1811 - 1812. [1]
An estimated M6.0 earthquake was reported near the town of Marked Tree, Arkansas on January 4, 1843. [2]
Disclaimer: This earthquake list was compiled at the Arkansas Geological Survey (AGS), but no warranty, expressed or implied, is made by the AGS regarding the accuracy of this information and location of earthquake epicenters, nor shall the act of distribution constitute any such warranty. [3]
The first earthquake which measured magnitude 8.6 occurred at 2:30 am; the second, which was magnitude 8.3 at 8:15 am; and the third, which was magnitude 8.0, at noon. [4]
An earthquake occurred near Melbourne, about 95 miles northeast of Little Rock, in December 1883. [1]
This marked the first of a series of powerful earthquakes that spanned a three-month period. [2]
These three earthquakes ruptured the entire southern segment of the New Madrid fault, a length of about 90 miles. [...] The first struck January 4, 1843, centered in Arkansas at the extreme southern end of the fault, at Marked Tree, Arkansas. [4]
This earthquake caused the land to subside forming new lakes and did damage to chimneys and brick structures (Jackson, 1979). [...] On December 16, 1811 residents living in the region near New Madrid, Missouri were jolted awake at 2:15 AM by a major earthquake. [2]
A shock in March, 1911, about 40 miles south of Little Rock, was so severe at Pine Bluff that hundreds of excited residents crowded into the streets in panic; windows were broken in several sections of the city. [1]
Brief article on the New Madrid earthquakes and other Arkansas earthquakes including the 1969 New Years Day earthquake in central arkansas. [5]
The Enola swarm was initiated by a magnitude 1.2 earthquake recorded on January 12, 1982 near the town of Enola in Faulkner County, Arkansas. [3]
4.7 Richter magnitude earthquake in the Fouche River area of Perry County, which was felt by residents in Little Rock and central Arkansas. [5]
These earthquakes happened in the New Madrid seismic zone (NMSZ), an active fault system that extends from Cairo, Illinois to Marked Tree, Arkansas. [3]
Sources:
[1] Arkansas
[2] Historic Earthquakes
[3] AGS: Earthquakes
[4] History
[5] UALR ACEETT - Arkansas Geology and Earthquakes - Commerce …