Hello Marli - The darker features on Augustine are steeper places of the volcano - they're typically dark. The webicorder has had some electronic noise recently. Thanks for your interest, Cheryl -------- Marli Holden wrote: 11 am Tuesday morning: what's that big black mark down the left side of our Augustine? Also, there's a big black spot about 1/3 down on the right/center. Her webicorder is showing some unusual activity, too. What's up, do you know? -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050