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Mauna Loa: Quiet for many years, but not to be forgotten...
March 20, 2015

Mauna Loa: Quiet for many years, but not to be forgotten

‘A‘ā lava flows erupt from the Northeast Rift Zone of Mauna Loa on March 25, 1984—the first day of the volcano's most recent eruption. USGS photo.

A wide view of Kīlauea and Mauna Loa volcanoes, looking northwest. ...
September 6, 2014

A wide view of Kīlauea and Mauna Loa volcanoes, looking NW. Pu‘u ‘...

A wide view of Kīlauea and Mauna Loa volcanoes, looking northwest. Pu‘u ‘Ō‘ō Crater, on Kīlauea's East Rift Zone, is the large fuming crater just to the left of the image center. Just to the right of the center point, on the northeast flank of Pu‘u ‘Ō‘ō cone, smaller fume sources trace the lava tube supplying lava to the June 27th lava flow (the front of this flow is out

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Hilo was again threatened by a Mauna Loa lava flow in 1881...
June 26, 2014

Hilo was again threatened by a Mauna Loa lava flow in 1882

A sketch by Joseph Nāwahī showing the 1881 lava flow approaching Hilo. (Courtesy of National Park Service, Hawai‘i Volcanoes National Park, HAVO 394, Volcano House Guest Register 1873 to 1885, illustration by Joseph Nāwahī, February 21, 1881.)

Preview image for video: Winter storm deposits snow on Mauna Loa's ...
January 29, 2014

Preview image: Winter storm deposits snow on Mauna Loa's summit

Preview image for video: This Quicktime video shows a time-lapse sequence spanning from dawn to dusk on Tuesday, January 28, using images collected by our webcam near the summit of Mauna Loa Volcano (13,680 ft above sea level). The dawn is sunny with clear views across the summit caldera (Moku‘āweoweo), but this clear weather soon deteriorates into thick clouds and steady

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Preview image for video: Winter storm deposits snow on Mauna Loa's ...
January 29, 2014

Preview image: Winter storm deposits snow on Mauna Loa's summit

Preview image for video: This Quicktime video shows a time-lapse sequence spanning from dawn to dusk on Tuesday, January 28, using images collected by our webcam near the summit of Mauna Loa Volcano (13,680 ft above sea level). The dawn is sunny with clear views across the summit caldera (Moku‘āweoweo), but this clear weather soon deteriorates into thick clouds and steady

...
January 28, 2014

Winter storm deposits snow on Mauna Loa's summit

This Quicktime video shows a time-lapse sequence spanning from dawn to dusk on Tuesday, January 28, using images collected by our webcam near the summit of Mauna Loa Volcano (13,680 ft above sea level). The dawn is sunny with clear views across the summit caldera (Moku‘āweoweo), but this clear weather soon deteriorates into thick clouds and steady snowfall as a winter

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Mauna Loa: How well do you know the volcano in your backyard?...
January 8, 2014

Mauna Loa: How well do you know the volcano in your backyard?

Erupting vents on Mauna Loa's Northeast Rift Zone near Pu‘u‘Ula‘ula (Red Hill) on Mar. 25, 1984—just hours after the eruption began—sent massive ‘A‘ā lava flows moving toward Hilo at 4 miles per hour. By the time the eruption ended on April 15, lava flows had reached to within four miles of Hilo city limits. USGS photo.

Thomas Jaggar and his wife, Isabel, hiking on Mauna Loa during the ...
December 7, 2012

Thomas Jaggar and his wife, Isabel, hiking on Mauna Loa during the ...

Thomas Jaggar and his wife, Isabel, hiking on Mauna Loa during the September 1919 Southwest Rift Zone eruption.

The summit of Mauna Loa (left) rises above the vog layer on the lee...
November 10, 2012

The summit of Mauna Loa rises above the vog layer on the leeward si...

The summit of Mauna Loa (left) rises above the vog layer on the leeward side of the Island of Hawai‘i in November 2012. The flank of Hualālai is visible at right.

Color photograph showing the summit of a volcano above volcanic gas interacting with the atmosphere
November 10, 2012

Summit of Mauna Loa above vog in November 2012

The summit of Mauna Loa (left) rises above the vog layer on the leeward side of the Island of Hawai‘i in November 2012. The flank of Hualālai is visible at right.

Mauna Loa looms behind HVO and Jaggar Museum...
March 6, 2012

Mauna Loa looms behind HVO and Jaggar Museum

The Hawaiian Volcano Observatory and Jaggar Museum, shown in this photo, sit atop the summit of Kīlauea Volcano. The snow-capped summit of Mauna Loa, nearly 10,000 feet higher than Kīlauea, looms in the background.

Mauna Loa looms behind HVO and Jaggar Museum...
March 6, 2012

Mauna Loa looms behind HVO and Jaggar Museum

The Hawaiian Volcano Observatory and Jaggar Museum, shown in this photo, sit atop the summit of Kīlauea Volcano. The snow-capped summit of Mauna Loa, nearly 10,000 feet higher than Kīlauea, looms in the background.