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.
According to FEMA, the other states in the New Madrid seismic zone are Tennessee, Mississippi, Arkansas, Missouri, Kentucky, Indiana, Illinois and Oklahoma. St. Louis and Memphis are the biggest metropolitan areas in the NMSZ. North Alabama is also impacted by the East Tennessee fault line.he biggest earthquake in U.S. history happened in the New Madrid seismic zone in 1812, and in just the last few weeks, activity along the fault line is starting to heat up.