Volcanoes across the country are beginning to wake up and erupt, and no one has a good explanation for why it's happening.

A seismologist from Seattle discussed recent volcanic activity across the United States. Here's what you should know.

Lava in Hawaii, seismic shaking in Alaska and underwater rumblings near Oregon. Scientists say it’s not the end of the world, ...

Three remote Alaska volcanoes — Pavlof, Great Sitkin , and Semisopochnoi — are in various states of eruption, one producing lava and the other two blowing steam and ash.

Great Sitkin is a volcano that occupies most of the northern half of Great Sitkin Island, which is part of the Aleutian Islands chain. The volcano is oval-shaped, eight by 11 kilometers at its ...

A volcano briefly erupted Tuesday night in the central Aleutian Islands near Adak. The 1- to 2-minute explosion of Great Sitkin volcano began just after 9 p.m., according to an activity notice ...

The two other volcanoes – the Great Sitkin Volcano and Semisopochnoi Volcano – sit hundreds of miles away. The latter volcano spewed an ash cloud about 10,000 feet into the air on an ...

The eruption prompted the USGS and the Alaska Volcano Observatory (AVO) to issue a joint ‘red warning’ to aviation after observations suggested the ash plume from the Great Sitkin volcano ...

Alaska’s Great Sitkin volcano erupted Wednesday. Great Sitkin is located in the Aleutian Islands and is 26 miles from the community of Adak. Alaska holds more than three-quarters of all U.S ...

Three Alaskan volcanoes have been erupting simultaneously for the last two weeks. The three volcanoes include the Pavlof Volcano, the Great Sitkin Volcano and the volcanic island of Semisopochnoi ...

The smoking crater of Great Sitkin volcano on Great Sitkin Island in the Aleutian Islands of Alaska, circa 1955. The USGS tweeted that the volcano’s activity had increased above the usual ...

The two other volcanoes – the Great Sitkin Volcano and Semisopochnoi Volcano – sit hundreds of miles away. The latter volcano spewed an ash cloud about 10,000 feet into the air on an ...