Mudslide (IMAGE) Penn State Caption A stream channel showing accumulation of fine sediment following the 2009 Station Fire in the San Gabriel Mountains, Southern California. Fine sediment is eroded off steep hillsides during and immediately after wildfire, and then mobilized by debris flows during winter storms. Credit Roman DiBiase, Penn State Usage Restrictions non commercial use only License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.