Skip to main content
U.S. flag

An official website of the United States government

Lava Flows

Filter Total Items: 8

1926 Eruption

Mauna Loa's recognized eruptive pattern is a summit eruption followed—within hours, days, or months—by a flank eruption. In 1926, there was a brief summit eruption, followed by 14 days of eruption on the Southwest Rift Zone.
link

1926 Eruption

Mauna Loa's recognized eruptive pattern is a summit eruption followed—within hours, days, or months—by a flank eruption. In 1926, there was a brief summit eruption, followed by 14 days of eruption on the Southwest Rift Zone.
Learn More

Geology and History of Mauna Loa

Mauna Loa is the largest active volcano on Earth. Mauna Loa is in the shield-building stage of Hawaiian volcanism, a period when the volcanoes grow most rapidly, adding as much as 95 percent of their ultimate volume.
link

Geology and History of Mauna Loa

Mauna Loa is the largest active volcano on Earth. Mauna Loa is in the shield-building stage of Hawaiian volcanism, a period when the volcanoes grow most rapidly, adding as much as 95 percent of their ultimate volume.
Learn More

November 27-December 10, 2022 Eruption of Mauna Loa

Mauna Loa had not erupted since 1984—its longest quiet period in recorded history.
link

November 27-December 10, 2022 Eruption of Mauna Loa

Mauna Loa had not erupted since 1984—its longest quiet period in recorded history.
Learn More

March 25 - April 15, 1984 Eruption of Mauna Loa

The 1984 eruption of Mauna Loa ended a 9-year period of quiescence.
link

March 25 - April 15, 1984 Eruption of Mauna Loa

The 1984 eruption of Mauna Loa ended a 9-year period of quiescence.
Learn More

1975 Short-lived Eruption of Mauna Loa

Following 25 years of slumber, Mauna Loa awoke with a spectacular, but short-lived, eruption just before midnight on July 5, 1975.
link

1975 Short-lived Eruption of Mauna Loa

Following 25 years of slumber, Mauna Loa awoke with a spectacular, but short-lived, eruption just before midnight on July 5, 1975.
Learn More

1950 - Mauna Loa's Fastest High Volume Eruption

On June 1, 1950, a fissure erupted high on Mauna Loa's Southwest Rift Zone, and within 3 hours, ‘a‘ā lava flows had crossed the main highway on the west coast of the Island of Hawai‘i.
link

1950 - Mauna Loa's Fastest High Volume Eruption

On June 1, 1950, a fissure erupted high on Mauna Loa's Southwest Rift Zone, and within 3 hours, ‘a‘ā lava flows had crossed the main highway on the west coast of the Island of Hawai‘i.
Learn More

1942 – A Secret Eruption of Mauna Loa

Mauna Loa's "secret" eruption began on April 26, 1942.
link

1942 – A Secret Eruption of Mauna Loa

Mauna Loa's "secret" eruption began on April 26, 1942.
Learn More

1935 Eruption of Mauna Loa Threatened Hilo

On November 21, 1935, an eruption began in Mauna Loa's summit caldera and quickly migrated down its Northeast Rift Zone.
link

1935 Eruption of Mauna Loa Threatened Hilo

On November 21, 1935, an eruption began in Mauna Loa's summit caldera and quickly migrated down its Northeast Rift Zone.
Learn More
Was this page helpful?