(KMOV.com) – Residents in Imperial, other parts of Jefferson County, south county, and various other regions were caught off guard when a 2.5 magnitude earthquake hit the area.
The cause was unknown for a while with many people speculating that an explosion had occurred. But the confusion was cleared up when the United States Geological Survey declared the quake happened around 5:30 p.m.
The earthquake mostly affected Imperial, Arnold, Oakville, Concord, and Jefferson City. The region borders on the much more seismically active New Madrid seismic zone, according to the USGS.
They also say that “moderately frequent earthquakes occur at irregular intervals throughout the region.” The largest earthquake in this area happened in 1968 and was a 5.4 magnitude.