Mystery on Venus: 'Super-Hurricane' Force Winds Inexplicably Get Stronger
by Mike Wall, SPACE.com Senior Writer
Date: 18 June 2013 Time: 03:29 PM ET
Average cloud-top wind speeds on Venus rose 33 percent between 2006 and 2012, jumping from 186 mph (300 km/h) to 249 mph (400 km/h), observations by Europe's Venus Express orbiter show.
"This is an enormous increase in the already high wind speeds known in the atmosphere," Igor Khatuntsev of the Space Research Institute in Moscow said in a statement. "Such a large variation has never before been observed on Venus, and we do not yet understand why this occurred." [Mysterious Venus: 10 Weird Facts]