Final and largest New Madrid shock
- When
- 7 February 1812
- Where
- Epicenter near New Madrid, Missouri Territory
A major earthquake struck near New Madrid, Missouri, at 3:45 am local time on 7 February 1812, with contested magnitude estimates.
The last of the large New Madrid earthquakes occurred on 7 February 1812 at 09:45 UTC (3:45 am local time), with its epicenter near New Madrid. One source estimates the moment magnitude at 7.4–8.6; another gives about 7.5. The upper range exceeds 8, but the sources do not agree on a single figure, so the magnitude should be treated as contested. The event concluded the sequence of four large shocks that had begun on 16 December 1811.
Sources
- 1811–1812 New Madrid earthquakes Wikipedia, revision of 2026-09-30
- New Madrid seismic zone Wikipedia, revision of 2026-06-30
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.