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 new maps also reflect expanded earthquake risk around the New Madrid Seismic Zone in southwestern Missouri; the zone stretches into Illinois, Indiana, Kentucky, Tennessee, Mississippi, and Arkansas. A series of earthquakes up to magnitude 8.1 devastated that area in 1811 and 1812. Higher risk is also seen across much of the West Coast, thanks to new data from California and the Northwest's Cascadia Subduction Zone.