Guy–Greenbrier earthquake swarm
Map of earthquake epicenters for the period August 6, 2010 to March 1, 2011 | |
| UTC time | ?? |
|---|---|
| ISC event | n/a |
| USGS-ANSS | n/a |
| Local date | 2010–11 |
| Duration | Less than one year |
| Type | Intraplate earthquakes |
| Areas affected | Central Arkansas |
| 4.7 Mw | |
| Total events | 150–160 earthquakes |
The Guy–Greenbrier earthquake swarm occurred in central Arkansas beginning in August 2010. The epicenters of earthquakes in the swarm showed a linear distribution, with a clear overall shift in activity towards the southwest with time, and the largest event in the swarm was the 2011 Arkansas earthquake, at 4.7 on the moment magnitude scale.