Over millions of years, the Earth’s upper layers have performed a dance that has created mountains, volcanoes, continents, ridges and ocean trenches. Tectonic plates play a key role in this process.

Scientists fear that a North American volcano may soon erupt. It would be the first time that it has erupted since 1992. Researchers say the volcano appears to be "moving closer to an eruption." ...

Life for the residents of South Central Alaska comes with many daily challenges. The weather is harsh and unpredictable, with long, cold winters and the occasional blizzard. There is also the risk of ...

In the 1780s, the volcano rumbled to life with such force that it sent high-speed avalanches of hot rock, gas and ash down its slopes. Those flows quickly melted the snow and ice and mixed with the ...

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