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

Mauna Loa, which covers half the island of Hawaii, has erupted 33 times since 1843, the volcano’s first “well-documented historical eruption,” according to the US Geological Survey.

The first eruption in 38 years of Mauna Loa, the world’s largest active volcano, is drawing visitors to Hawaii Volcanoes National Park, which is open 24 hours a day.

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.

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.

The eruption began in Moku’āweoweo, the summit caldera of Mauna Loa, on Sunday at approximately 11:30 p.m. HST, according to the Hawaii Volcano Observatory.

Mauna Loa, which is the largest active volcano on Earth, started to erupt at 11:30pm Hawaiian local time on November 27, the United States Geological Survey (USGS) announced at 11:45pm.

Mauna Loa last erupted in 1984, and in the years afterward, it stayed mostly silent, even as the smaller neighboring volcano, Kilauea, which shares the same magma plume, erupted continuously.

Mauna Loa has erupted 33 times since 1843, the date of the first recorded eruption. On average, that it is one eruption every five and a half years. However, the last eruption was almost 40 years ago.

Hawaii Hawaii's Mauna Loa volcano: Earthquakes rumble, sending warning signs of possible eruption Covering half of the island of Hawaii, Mauna Loa is the world's largest active volcano ...

Mauna Loa is currently quiet and now is a good opportunity to remember the 1950 Southwest Rift Zone eruption — the volcano’s most recent eruption to have caused significant damage — 75 years ...