Thyroid replacement hormones usually are well tolerated. Symptoms that occur during treatment are often due to toxic, elevated levels of thyroid hormones and resulting symptoms from hyperthyroidism.
Facts about the New Madrid Seismic Zone. The New Madrid Seismic Zone (NMSZ) is the most active seismic area in the United States east of the Rocky Mountains. The NMSZ is located in southeastern Missouri, northeastern Arkansas, western Tennessee, western Kentucky and southern Illinois.
The first in the series of three New Madrid earthquakes occurred 200 years ago today, in the early morning of Dec. 16, 1811, in what was then a sparsely populated town in the Louisiana Territory, now the Missouri Bootheel. The second occurred on Jan. 23, 1812, and the thirdâbelieved to be the strongestâon Feb. 7, 1812.