Bill "The Big Whistle" Chadwick, the first U.S.-born official in NHL history who was later a television analyst for the New York Rangers, died Saturday. He was 94.

“What’s leading us to talk about an eruption in the next year and by the end of 2025 is we’re almost fully reinflated to the level it was before the 2015 eruption,” Chadwick explained.

Volcanologist Bill Chadwick looks for keys to predicting volcanic eruptions. Axial volcano is one of the most active volcanoes on the planet and it exists just off the coast of Oregon.