The 1989-90 Eruption of Redoubt Volcano, Alaska: A Catalyst for Innovation in Aircraft – Ash Hazard Mitigation, Hazard Communications, Real-Time Data Analysis, and Eruption Forecasting

John A Power1, Thomas Casadevall2, Thomas P Miller3, John N Davies4, Bernard A Chouet5 and Thomas L Murray3, (1)USGS, Alaska Volcano Observatory, Anchorage, AK, United States, (2)US Geological Survey, Lakewood, CO, United States, (3)USGS, Anchorage, AK, United States, (4)University of Alaska Fairbanks, Fairbanks, AK, United States, (5)USGS, Menlo Park, CA, United States