The hurricane Sandy that hit the U.S. towards the end of October 2012 has been the subject of conspiracy theories about weather modification. One theory is that the hurricane has been artificially created to affect the U.S. presidential election.
The H.A.A.R.P. antennae located in Alaska has been the subject of several conspiracy theories. This scientific equipment is thought by some to be able to create weather conditions as well as earth quakes.