Thanks to Clyde Foster and Efrain Rivera Morales for their excellent images of 
the Hellas region. They provide evidence of strong straight-line winds producing 
waves of dust off of the crater's floor. I think this may be the first time that 
ALPO has recorded such events. This is exciting to me! The clincher is Clyde 
Foster's May 9th image showing what was a wave of dust hitting the 6-mile high 
crater wall. Before these pictures, we would have said that this was a dust 
storm.  Please see The Association of Lunar & Planetary Observers ALPO Home 
 Then go to the Mars Section. Or see attachment.

[Jim Melka,St.Louis,Missouri U.S.A.]

ALPO-Japan Latest      Mars Section