Who is Harry Dalton do in the film dantes peak?

In the film "Dante's Peak," Harry Dalton is a volcanologist portrayed by Pierce Brosnan. He is sent to the small town of Dante's Peak to assess the potential volcanic activity after detecting unusual signs. As he investigates, he discovers that the dormant volcano is showing signs of an impending eruption and must warn the townspeople while facing skepticism and resistance from local authorities. His expertise and determination play a crucial role in trying to save the town from disaster.