The Kraffts were often the first to be at an active volcano, and were respected and envied by many volcanologists. Their footage of the effects of volcanic eruptions was a considerable factor in gaining the cooperation of local authorities faced with volcanic threats. One notable example of this was after the onset of activity at Mount Pinatubo in 1991, where their video of the effects of the eruption of Nevado del Ruiz in Colombia was shown to large numbers of people, including Philippine President Cory Aquino, and convinced many skeptics that evacuation of the area would be necessary.