Weston Observatory seismographs recorded a M5.0 earthquake 25km NNE of Shawville, Canada at 09:43EDT today (May 17th). They also recorded a smaller M3.7 aftershock. These magnitudes may change as new data comes in.
If you have felt these earthquakes, please log your report here:
http://earthquake.usgs.gov/earthquakes/eventpage/usb000gxna#dyfi
Below is a screenshot from the WES seismic station:









