Closing Mauna Loa and three other U.S. sites that track greenhouse gases would disrupt a decades-long record of the planet’s changing atmosphere.

In 1956, United States scientist Charles Keeling chose Hawaii's Mauna Loa volcano as the site of a new atmospheric measuring station.

Data collected by Mauna Loa from 1958 onward let us clearly see the evidence of climate change for the first time. The station samples the air and measures global CO₂ levels.

The Mauna Loa laboratory in Hawaii has measured atmospheric carbon dioxide, which — along with other planet-warming pollution — has led directly to climate change, driving sea level rise ...

Hawaii's Kilauea volcano sent jets of lava shooting over 1,000 feet into the air early Friday morning, marking another explosive episode for the active volcano.

Mars orbiter captures first-ever photo of volcano above clouds, taller than any on Earth Known as Arsia Mons, the volcano on Mars dwarfs Earth’s tallest volcano, Mauna Loa in Hawaii.

An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time ...

For the first time, the seasonal peak of carbon dioxide concentrations in the atmosphere exceeded 430 parts per million (ppm) at NOAA’s Mauna Loa Observatory on Hawaii, scientists from NOAA and ...

For the first time, the seasonal peak of carbon dioxide concentrations in the atmosphere exceeded 430 parts per million (ppm) at NOAA's Mauna Loa Observatory on Hawaii, scientists from NOAA and ...

An observatory high on Hawaii's Mauna Loa volcano that measures carbon dioxide in the atmosphere has reported its highest ever seasonal peak concentration of the greenhouse gas. For the first time ...

Hawaii's Kilauea volcano resumed its sporadic eruption on Sunday, shooting lava hundreds of feet into the air and releasing huge plumes of ash and other volcanic material into the skies.

When a town in Hawaii was threatened by lava in 1935, a group of airplanes tried to redirect the flow. Mark Strauss A bomb detonates on Hawaii's Mauna Loa volcano, near the 8,500-foot-elevation ...