Is their an earthquake trend in Faulkner County?
Geologist Scott Ausbrooks said Faulkner County has settled into a pattern.
"We actually noticed there is a trend. It started back in October. We have big earthquakes, then they tend to go back down and then you have quiet," said Ausbrooks.
Why was this earthquake felt by so many people throughout the state?
Sheer magnitude, said Ausbrooks.
"When you go from a 3 to a 4" said Ausbrooks referring to the Richter scale, "that's 32 times more energy released. This was a 4.7, close to a five, so when you go to 4.7 it's 900 times more energy released in a 5."
Will we see bigger quakes in Faulkner County?
While it's unlikely, Ausbrooks said we could see even bigger quakes from the nearly four mile long fault.
"You could expect, if the whole fault went at one time, the whole fault ruptured, which we haven't seen at this point, you could generate anywhere from a 5.0 to a 5.5."
What's causing the earthquakes?
According to Aubrooks, there are two possible causes to the earthquakes in Faulkner County. One possibility is the region's history of earthquakes. The area experienced the "Enola swarm" in 1982, which produced similar sized earthquakes for three years.
The other possibility is the disposal of fracking fluid into the earth. Fracking fluid is used in the natural gas drilling process. Once the process is complete, that fluid is extracted and disposed of into the earth through what's known as an injection site.
"What we see are these tight clusters [of earthquakes] and what we have not ruled out is the possibility related to injection wells," said Ausbrooks. "Once they're done with that hydro-fracking process, they take that water and dispose of it. And there are cases where injection wells have induced seismicity."
The Arkansas Geological Survey should know by August if those injection sites are to blame.
Did Sunday's earthquake effect the New Madrid fault?
In a word, no.
"It would take a tremendous sized earthquake to have even remotely triggered something there. It's not unheard of, but given the distance, I would not expect anything to happen like that."