Volcanoes,earthquakes,andtornadoesallcancauseenormousdamage,andpredictingwhereandwhentheywillstrikeisofgreatimportanceVolcanologistDrMarieEdmondshasdevisedsensorsthatmonitortheundergroundactivityofmagmatobetterpredictfutureeruptionsontheCaribbeanislandofMonserrat,thesiteofthemassive1995eruptioncapturedforthisfilmGeophysicistDrRossSteinstudiedtheearthquakerepairrecordsinIstanbul'sHagiaSophiaoverthecenturiestofindcluesaboutthehistoryofearthquakesinTurkeyHediscoversapatterninquakesalongthelongNorthAnatolianFaultsystem,includingthemassivelydestructivequakeatIzmitin1999,andpredictsthenextearthquakejustafewmilessouthofIstanbulDrJoshuaWurmanandhisteamchasetornadosintrucksequippedwithDopplerradarinanattempttoprobetheinteriorofatornadojustasitisborn