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.
Researcher Otto Nuttli wrote that this quake caused 60 miles of the New Madrid Fault to rupture. This caused waterfalls on the Mississippi, and the river to run backwards for several hours, in the river bends just northeast of New Madrid. This quake also created Reelfoot Lake in Northwest Tennessee.he New Madrid (MAD'rud) Seismic Zone, midway between St. Louis and Memphis, has a history of shaking violently, about every 500 years. When it shook for three months in 1811-12, this was the western frontier, and the population was sparse.