Q: How do tours of natural hot thermal geysers, such as in Rotorura, NZ run to a timed rota so that when tourist arrive at an advertised time each day, the guide gives his speech, then miraculously the geyser blows??
A: An excellent question considering how difficult nature can be to predict. Our understanding is that geysers that erupt frequently, say 20+ times per day, can often be quite predictable and run more or less to a timetable. For example, it’s reckoned that eruptions of the Old Faithful geyser in Yellowstone Park can be predicted within a +/- 10 minute window.