Okmok Volcano AVO main page Okmok Volcano Okmok volcano began erupting in mid-February, 1997. Okmok is on Umnak Island, in the eastern Aleutian Islands, about 75 miles west-southwest of Dutch Harbor. Later reports from on-site observers suggest that the eruption began at least a few days before February 13. This image was obtained on February 18 and shows several square kilometers of hot ground - presumably incandescent lava.
Hot pixels are white on the image.
Each pixel is one square kilometer. Saturated pixels record ground temperatures above 50 degrees centigrade averaged over the entire pixel. This image suggests that there is fresh lava covering about half the caldera floor. Synthetic Aperture Radar image of Okmok from before the current eruption. Image courtesy of the Alaska SAR Facility.