Mauna Loa is among Earth's most active volcanoes, having erupted 34 times since its first well-documented historical eruption in 1843. It has produced large, voluminous flows of basalt that have reached the ocean eight times since 1868.

Nov 27, 2023 · When describing the location of eruptions and lava flows on Mauna Loa, scientists refer to five broad areas on the volcano. The summit area is that part of the volcano above the 3,660-m (12,000 ft) elevation, includes Moku‘āweoweo Caldera and the …

Mauna Loa, the largest active volcano on Earth, rises about 4,170 m (13,680 ft) above the Pacific Ocean. But the submarine part of the volcano descends an additional 5,000 m (16,400 ft) to the sea floor, which is depressed by Mauna Loa's enormous mass another 8,000 m (26,250 ft).

Dec 12, 2022 · This reference map depicts the ongoing Mauna Loa eruption on Dec. 12, 2022.

Jan 2, 2025 · Background: Mauna Loa is the largest active volcano on our planet and covers half of the Island of Hawaiʻi. Eruptions tend to produce voluminous, fast-moving lava flows that can …

Rising gradually to more than 4 km (2.5 mi) above sea level, Hawaii’s Mauna Loa is the largest active volcano on our planet. Its submarine flanks descend to the sea floor an additional 5 km (3 mi), and the sea floor in turn is depressed by Mauna Loa's great mass another 8 km (5 mi).

Jan 2, 2025 · Background: Mauna Loa is the largest active volcano on our planet and covers half of the Island of Hawaiʻi. Eruptions tend to produce voluminous, fast-moving lava flows that can impact communities on the east and west sides of the Island.

Island of Hawai‘i map, showing Mauna Loa and the other four volcanoes that make up the island. Mauna Loa structural features include summit caldera, rift zones, radial vents, and historical lava flows.

Mauna Loa on the Island of Hawai‘i is the world’s largest volcano. People residing on its flanks face many hazards that come with living on or near an active volcano, including lava flows, explosive erup-tions, volcanic smog, damaging earthquakes, and local tsunami (giant seawaves).

Mauna Loa is Earth's largest active volcano and covers just over half of the Island of Hawaiʻi. It erupted most recently in 2022 and it will erupt again. This page provides resources to help you understand Mauna Loa eruption hazards and develop an emergency plan.