The latest quake was at the Greeley airport.
August 13 2.1:
July 10, 2.1: http://earthquake.usgs.gov/earthquakes/eventpage/usb000rryt#summary
June 23, 2.6: http://earthquake.usgs.gov/earthquakes/eventpage/usc000rkv4#summary
June 22, 1.3: http://comcat.cr.usgs.gov/earthquakes/eventpage/usc000rkx3#summary
June 17, 1.5: http://comcat.cr.usgs.gov/earthquakes/eventpage/usb000rh1c#summary
May 31, 2.0: http://earthquake.usgs.gov/earthquakes/eventpage/usc000ral7#summary
May 31, 3.4: http://earthquake.usgs.gov/earthquakes/eventpage/usc000r9pp#summary
The red X is the epicenter of the quakes (between county roads 43 and 45).
The blue squares to the SE are injection wells. The blue stars are active drilling/fracking sites.
Sign a petition to shut down injection wells.