Strange Sounds
There was a M4.0 earthquake Wednesday night just outside of Poplar Bluff, which reportedly was felt off and on in seven to 10-second intervals and reported almost 5,000 times on the USGS website.
The earthquake happened at around 8:53 pm. Many across southeast Missouri and northeast Arkansas were able to feel an earthquake Wednesday night. The center of the quake was in northern Butler County, just seven miles southeast of Williamsville, Missouri.
The tremor was followed by a smaller M2.5 quake at the same location and was preceded by two others in Kansas (M2.9 and M3.0) and another one in Arkansas (M2.9).
The quake was within what is called the New Madrid Seismic Zone. This zone generated the massive family of quakes between 1811 and 1812 that changed the course of the Mississippi River. Experts believe the New Madrid Zone has been responsible for magnitude 7 to 8 intensity earthquakes about every 500 years over the past 1200 years.
Saint Louis University seismologist Robert Herrmann said Missouri has been spared from major earthquakes in recent years, lulling concerns over possible tremblors. But Hermann said he “would recommend that they still worry about earthquakes.”
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