KNOXVILLE, Tenn. (WVLT) -- USGS reports three earthquakes struck Greenback on Friday morning.
One magnitude 2.3 quake hit Greenback at 2:22 a.m. and another 2.2 magnitude at 3:53 a.m. The last one was recorded at around 10 a.m.
This is just one of many that have hit the East Tennessee area recently. A 3.4 magnitude hit Maynardville on March 5. One hit near Rutledge on Feb. 26 and Harriman on Feb. 22, and several others hit the area at the start of 2019.
Knoxville and surrounding areas do not sit on a traditional plate boundary, what we often think of as causing tremors. Instead, we sit along the East Tennessee Seismic Zone. Most local earthquakes are 'weaker,' but some people will still feel the ground shaking if the magnitude is 2.5 or higher.
Experts say the "big one" is always possible, however.
You may hear sounds with earthquakes. According to the USGS, many people report hearing loud "booms" along with seismic activity.
"No one knows for sure, but scientists speculate that these "booms" are probably small shallow earthquakes that are too small to be recorded, but large enough to be felt by people nearby," USGS says.
WVLT News has not received any reports of damage.