Satellite and Slow-Scan Television Observations of the Rise and Dispersion of Ash-Rich Eruption Clouds from Redoubt Volcano, Alaska,
ALASKA UNIV FAIRBANKS GEOPHYSICAL INST
Pagination or Media Count:
Polar-orbiting NOAA 10 and 11 weather satellites with their Advanced Very High Resolution Radiometer AVHRR imaging sensors and the Landsat 4 and 5 satellites have provided over 30 images of the 198990 eruptions of Redoubt Volcano. Between December 14 and April 21, about 20 major explosive eruptions occurred with ash plumes rising to heights of 10 km or more, most of them penetrating the tropopause. The ash severely impacted domestic and international air traffic in Alaska with a near disaster on December 15, 1989, when a KLM 747-400 jet aircraft with 247 people aboard intercepted an ash plume and temporarily lost all four engines. Fortunately, the engines were eventually restarted after several attempts and the plane landed safely in Anchorage. We have used satellite and also slow-scan television TV observations to study the dynamics and thermodynamics of rising eruption plumes in order to better understand plume dispersal.
- Geology, Geochemistry and Mineralogy