time-lapse images of dust plumes generated from ground shaking during the Sierra El Mayor earthquake on April 4. In the still image to the right, the Sierra El Mayor and Sierra Cucapa ranges form a northwest trending line zone just south of the US-Mexico border on the east side of Laguna Salada. More prominent is a pair of light colored dust plumes streaming to the northeast crossing into California, and heading almost to Arizona.
I can't get a copy of the time lapse video to embed here but I encourage you to visit gawker.com to watch the loop a few times. It's impressive.