Topic: Mount St. Helens

Odd meteorite could be time capsule of a wetter Mars

Scientists have analyzed a meteorite found on Earth and suggest that it could come from Mars's crust at a time when the planet was still wet and volcanically active.

Landsat program marks 40 years of photographing Earth from space (+video)

The Landsat program, a network of seven Earth-facing satellites, turns 40 on Monday.

Crystals found in magma chambers may help scientists predict volcanic eruptions

To learn more about volcanic activity in an effort to help predict it, researchers investigated the magma from within volcanoes. Crystals often grow within magma chambers, large crevices of searing hot fluid rock beneath volcanoes.

Mexico's 'smoking mountain' lives up to its name (+video)

Mexican officials have raised the alert level for the volcano, Popocatépetl, as it spews ash and steam into the air and onto nearby communities.

Japan tsunami a wake-up call for US west coast

Japan’s earthquake and tsunami is alerting the US west coast that the same kind of thing could happen there. Experts who study the earth’s shifting crust say the “big one” may be past due.

Mount St. Helens: 30 years later -- what a comeback!

The story of how plants and animals on Mount St. Helens have rebounded after its cataclysmic eruption 30 years ago shows how ecosystems respond to major disturbances.

Mt. St. Helens and the Cascade Volcanic Arc: Iceland in America

Mt. St. Helens erupted 30 years ago. With an Icelandic volcano causing global problems today, the Mt. St. Helens anniversary is a reminder of volcanic activity in America's Lower 48 states.

30 years later, visitors remember Mount St. Helens eruption

Tuesday marks the 30th anniversary of the eruption of Mount St. Helens

Five biggest volcano eruptions in recent history

The eruption at Eyafjallajökull volcano in Iceland has been hugely disruptive to world travel. But as a volcanic event, it's barely worth mentioning.

Researchers puzzle over how long Iceland volcano will erupt

Ash from Eyjafjallajokull, the Iceland volcano that erupted this week, has caused airlines to cancel thousands of flights. Scientists say the chemical makeup and shape of the ash cloud's dust particles will tell them more.

When Mt. Redoubt erupts, these scientists are on the job

For them, 'volcano monitoring' is no punch line; it's an important part of keeping Alaska safe.

Which is the bigger polluter – humans or volcanoes?

EarthTalk: If you said ‘volcanoes,’ guess again. Here’s why.

USGS: Eruption risk from Alaska volcano rising

Dad's museum mania

On each museum trip, my sister and I were handed a quiz. If we did well, we got ice cream.