Geoff Wadge obituary (opens in new tab)

My friend and former colleague Geoff Wadge, who has died aged 76, was a pioneer of the use of remote sensing to monitor and study active volcanoes.In particular he became renowned for applying radar to detect ground movements before an eruption begins. Radar can see topography through clouds and can detect surface changes caused by underground movements of magma that sometimes indicate an impending explosion, thereby reducing the need for visits by scientists to dangerous areas close to a vol...