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Many residents remember Mauna Loa — the largest active volcano on Earth — roaring awake after decades of slumber with a dynamic summit and Northeast Rift Zone (NERZ) eruption in late 2022.

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 ...

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 ...

Mauna Loa is still active and most recently erupted between November and December 2022, according to the Global Volcanism Program. Mauna Kea, meanwhile, is dormant and has not erupted for at least ...

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 ...

The reopening of Uekahuna gives HNVP visitors another good spot from which to watch Kilauea’s on-again, off-again eruption, which began in late December and has since had 23 “episodes” of ...