Well.. we know the technology exist... Scalar electromagnetic weapons... The US posseses it as well as other nations like Russia...
U.S. Defence Secretary Cohen expresses concern about eco-terrorism using scalar electromagnetic weapons.
"Others [terrorists] are engaging even in an eco-type of terrorism whereby they can alter the climate, set off earthquakes, volcanoes remotely through the use of electromagnetic waves... So there are plenty of ingenious minds out there that are at work finding ways in which they can wreak terror upon other nations...It's real, and that's the reason why we have to intensify our [counterterrorism] efforts."
Secretary of Defense William Cohen at an April 1997 counterterrorism conference sponsored by former Senator Sam Nunn.
http://twm.co.nz/em-eco-terr.htm