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

The Mauna Loa laboratory in Hawaii has measured atmospheric carbon dioxide, which — along with other planet-warming pollution ...

This chart, begun by young researcher Charles David Keeling way back in 1958, chronicles the seasonal rise and fall – and ...

Fast forward to 2025, and there have been only three eruptions of Mauna Loa in the past 75 years since 1950: 1975, 1984, and ...

Cutting data climate collection – as the Trump administration is now trying to do – is like breaking a thermometer to avoid ...

The world's largest active volcano, Mauna Loa on Hawaii's Big Island, has started to erupt for the first time since March to April 1984, ending its longest known quiet period ever.

Mauna Loa released about 15,000 tons of carbon dioxide per day during its 1984 eruption, according to USGS data. That’s equivalent to the annual emissions from 2,400 sport utility vehicles.

Just 21 miles east of Mauna Loa, Kilauea’s ongoing eruption is now confined to a lake of lava rippling at its summit. But the history of this volcano is painful for Hawaii’s Big Island.