Three earthquakes (M3.6, M2.5, M2.4) rattle Harrison, Arkansas along the New Madrid Seismic Zone

A 3.6-magnitude earthquake rattled parts of Arkansas and surrounding states early Sunday, and two weaker temblors (M2.4) occurred a short time later and Sunday afternoon (M2.5).

The strongest quake shook buildings and sounded like loud thunder. More than 750 people in Arkansas, Oklahoma, Tennesee and Missouri reported to the U.S. Geological Survey that they felt the shaking along the New Madrid Seismic Fault.

These are the first earthquakes of more than 1.0-magnitude in Arkansas since May 14, when a 2.4-magnitude quake occurred south-southeast of Marshall.

M3.6 earthquakes Arkansas, M3.6 earthquakes Arkansas june 11 2017, 3 earthquakes rattle Arkansas along the New Madrid Seismic Zone on June 11 2017, M3.6 earthquakes rattle Arkansas along the New Madrid Seismic Zone on June 11 2017
3 earthquakes (M3.6, M2.5, M2.4) rattled Arkansas along the New Madrid Seismic Zone on June 11 2017. Location and epicenter of M3.6 quake. via USGS

The first and strongest quake rattled 19km NNE of Harrison, Arkansas around 7:40 a.m.

Most people reported categorized the M3.6 earthquake as weak or light tremors, which are typically not associated with any damage.

The reports of shaking stretched from the epicenter into Northwest Arkansas and as far south as Little Rock and Jefferson County. At least one person reported feeling the shaking in the Memphis area.

About fifty minutes later, a second M2.4 quake hit in the same area and was reported by only 7 people online.

The third and smallest quake also struck the same area a few hours later 2:26 p.m.

Weirdly, the first quake Sunday was initially said to be a 4.0-magnitude temblor before being downgraded to 3.2. It was later revised back up to a 3.6.

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