Hello Beth - You can sign up for notifications on all US volcanoes here: http://volcanoes.usgs.gov/vns/help.php Thank you, Cheryl -------- Elizabeth Krajewski wrote: I was wondering if you knew of specific bulletins that are sent when the aviation color code for a volcano changes? I'd like this information globally, but will take regionally if that is all that's available. Regards, Beth -- Cheryl Cameron Geologist, Alaska Volcano Observatory Alaska Division of Geological & Geophysical Surveys voice: 907-451-5012 fax: 907-451-5050