A SEISMOTECTONIC MODEL FOR THE 300-KILOMETER-LONG EASTERN TENNESSEE SEISMIC ZONE

Ten years of monitoring microearthquakes with a regional seismic netwo rk has revealed the presence of a well-defined, linear zone of seismic activity in eastern Tennessee. This. zone produced the second highest release of seismic strain energy in the United States east of the Roc ky Mountains during the last decade, when normalized by crustal area. The data indicate that seismicity produced by regional, intraplate str esses is now concentrating near the boundary between relatively strong and weak basement crustal blocks.