This undated file photo shows inside the crater on Mount St. Helens. (Pixabay) However, there have been other periods on similar seismic activity that did not lead to eruptions, namely in 1988 ...

The magma that first rose through the Earth’s crust into the chamber beneath Mount Hood cooled to form crystals. By studying the age of the crystals using radio-carbon dating, scientists ...

ANCHORAGE, Alaska -- Mount St. Helens is nowhere near another eruption, but new magma is rising underground, heaving the volcano upward and outward by the length of a fingertip, researchers said ...

Scientists say the way two large magma chambers are connected under Mount St. Helens may explain the peak's 1980 explosion, according to a report released Wednesday.

This undated file photo shows inside the crater on Mount St. Helens. (Pixabay) However, there have been other periods on similar seismic activity that did not lead to eruptions, namely in 1988 ...

VANCOUVER, Wash. (KPTV/Gray News) - Mount St. Helens, which notoriously erupted in 1980, has been showing signs of increased seismic activity lately, according to the U.S. Geological Survey.It’s ...

Mount St. Helens, which notoriously ... “Magma slowly rises through the lower crust and accumulates in a reservoir about 2.5 to 6 miles (4‒10 km) below sea level,” the USGS wrote.

VANCOUVER, Wash. (KPTV/Gray News) - Mount St. Helens, which notoriously erupted in 1980, has been showing signs of increased seismic activity lately, according to the U.S. Geological Survey.It’s ...

This undated file photo shows inside the crater on Mount St. Helens. (Pixabay) However, there have been other periods on similar seismic activity that did not lead to eruptions, namely in 1988 ...