Second day of New Madrid earthquakesIn 1812, the second day of powerful earthquakes struck, with an epicenter in the far southeast corner of Missouri. It was a part of a three-month series in the central Mississippi River valley, known as the New Madrid earthquakes. They began on 16 Dec 1811, with the first two major earthquakes, six hours apart, each with an epicenter in northeastern Arkansas. All were felt hundreds of miles away. All were powerful, about magnitude 7-7.5. There were many aftershocks, and an a final major earthquake on 7 Feb 1812. Contemporary accounts tell of houses damaged, chimneys toppled, remarkable geological phenomena and landscapes changed. They remain among the most powerful earthquakes in the United States. The New Madrid fault remains a concern.« |
