Volcano video and television surveillance monitoring systems

http://vulcan.wr.usgs.gov/Monitoring/Descriptions/description_video_tv.html

Visual monitoring of volcanoes by closed-circuit television and video monitoring for a permanent video record of events using slow-scan television which permits continuous surveillance at a distance for remote volcanoes or in times of danger.

by Miller, C. Dan; Hoblitt, Richard P.; Furukawa, Bruce T.; Murray, Thomas L.; McGee, Kenneth A.; and Cascades Volcano Observatory (Sponsor)