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U.S. Geological Survey's Hawaiian Volcano Observatory perched on th...
May 23, 2008

USGS's HVO perched on the rim of Kīlauea's summit caldera, Hawai‘i

U.S. Geological Survey's Hawaiian Volcano Observatory perched on the rim of Kīlauea Volcano's summit caldera, Hawai‘i

HVO and Jaggar Museum on Kīlauea Volcano's caldera rim, Hawai‘i...
May 23, 2008

HVO and Jaggar Museum on Kīlauea's caldera rim, Hawai‘i

Close view of the USGS Hawaiian Volcano Observatory (right, with viewing tower) and National Park Service Jaggar Museum and overlook (left) on Kīlauea Volcano's caldera rim. At least three fault blocks can be seen below the observatory, which developed when Kīlauea's summit collapsed about 500 years ago to form the present-day caldera.

Gas plume blown by tradewinds across Crater Rim Drive, Kīlauea Volc...
May 23, 2008

Gas plume blown by tradewinds across Crater Rim Drive, Kīlauea

This section of Crater Rim Drive in Hawai‘i Volcanoes National Park was closed in February 2008 because of the high concentration of volcanic gas blowing across the road from Halema‘uma‘u Crater by prevailing trade winds. The concentration of sulfur dioxide gas in this area is considered hazardous to human health.

Volcanic-gas plume from Halema‘uma‘u Crater drifts southwest, Kīlau...
May 21, 2008

Volcanic-gas plume from Halema‘uma‘u drifts SW, Kīlauea

Volcanic-gas plume rises from Halema‘uma‘u Crater as seen from the Jaggar Museum (Hawai‘i Volcanoes National Park) viewing area next to the U.S. Geological Survey's Hawaiian Volcano Observatory.

Volcanic gas plume rises from Halema‘uma‘u Crater, Kīlauea Volcano,...
May 16, 2008

Volcanic gas plume rises from Halema‘uma‘u, Kīlauea

Volcanic gas plume rises from Halema‘uma‘u Crater, Kīlauea Volcano, Hawai‘i

Volcanic gas plume rises from Halema‘uma‘u Crater, Kīlauea Volcano,...
May 16, 2008

Volcanic gas plume rises from Halema‘uma‘u, Kīlauea

Volcanic gas plume rises from Halema‘uma‘u Crater, Kīlauea Volcano, Hawai‘i

Volcanic-gas plume rising from summit of Kīlauea Volcano as seen fr...
May 16, 2008

Volcanic-gas plume rising from Kīlauea as seen from Highway 12

Volcanic-gas plume rising from summit of Kīlauea Volcano as seen from Highway 11, Hawai‘i

Pre-moonrise, time-lapse view of Halema‘uma‘u Crater from the Hawai...
April 27, 2008

Pre-moonrise, time-lapse view of Halema‘uma‘u from the HVO, Kīlauea...

Strong tradewinds blow the gas plume from the Overlook vent in Halema‘uma‘u Crater to the southwest. Photograph taken at 4:37 a.m. HST.

HVO geologist collects ash downwind of Halema‘uma‘u Crater, Kīlauea...
April 16, 2008

Geologist collects ash downwind of Halema‘uma‘u, Kīlauea

Ash and other lava fragments erupted from the new vent in HALE‘Ama‘uMAU Crater were collected almost daily from several wooden "tear catchers" located near the crater rim and from many more plastic buckets nearby. Six years later, ash collections are still made several times a week.

Image: Halema'uma'u Crater, Kilauea Volcano Summit Eruption 2008
April 16, 2008

Halema'uma'u Crater, Kilauea Volcano Summit Eruption 2008

Kīlauea Volcano's summit vent within Halema‘uma‘u Crater was about 115 feet in diameter in April 2008, a month after it opened. 

Trade winds blow gas plume from Halema‘uma‘u to the southwest, Kīla...
April 9, 2008

Trade winds blow gas plume from Halema‘uma‘u to SW, Kīlauea

Gas plume rising from the new Overlook Vent in Halema‘uma‘u Crater, Kīlauea Volcano, Hawai‘i. Trade winds blow the plume to the southwest.

Volcanic-gas plume rises from Halema‘uma‘u Crater, Kīlauea Volcano,...
April 7, 2008

Volcanic-gas plume rises from Halema‘uma‘u, Kīlauea

A plume of volcanic gases (chiefly water vapor, carbon dioxide, and sulfur dioxide), tiny lava and rock particles, and droplets drifts southwest in the tradewinds from Halema‘uma‘u Crater. The 500-5,000 metric tons (1.1-11 million pounds) of sulfur dioxide gas emitted each day react in the atmosphere and, with the other gases and particles, form "vog" (volcanic smog)

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USGS
June 9, 1995

Hawaii is seismically very active. During a typical month, there are invariably several earthquakes that are large enough to be felt. This past month was no exception, as there were nine earthquakes having magnitude greater than 3.0.

USGS
June 2, 1995

The eruption along Kīlauea's East Rift Zone continues with little change. Lava from two vents on the south and west sides of the Pu'u 'O'o cone is transported underground through a lava tube to the ocean about six-and-a-half miles to the southeast. No lava can be seen at either of the active vents.
 

Lava flow hazard map revisited...
May 28, 1995

Maps showing volcanic hazard zones for the Big Island were first prepared in 1974 by the U.S. Geological Survey.

USGS
May 19, 1995

The main function of the U.S. Geological Survey's Hawaiian Volcano Observatory is to reduce the risk from volcanic activity.
 

USGS
May 12, 1995

The current eruption along Kīlauea's East Rift Zone continues with passive effusion of lava. The lava is transported underground to the coast along the western edge of the flow field, where it enters the ocean after cascading over an ancient sea cliff.
 

USGS
May 5, 1995

Sitting at lunch on Wednesday, many residents of the island of Hawaii might have thought that someone or something had kicked their chairs. Of course, they were feeling the ground shaking generated by the sequence of small earthquakes beneath the south flank of Kīlauea Volcano that was reported in other news stories.
 

Kīlauea lava flow status as of April 30, 1995...
April 30, 1995

The 12-year-long eruption on Kīlauea's east rift zone continues, with vents on the southwestern flank of the Pu`u `O`o cone feeding directly into lava tubes. These tubes form within active lava flows and initially are very shallow.
 

USGS
April 21, 1995

A team of volcanologists from the U.S. Geological Survey has been monitoring an eruption that began just after midnight on April 3 on Fogo in the Cape Verde Islands off the west coast of Africa.

Hotspots...
April 14, 1995

Many of the islands that dot the center of the Pacific Ocean are made up of active, dormant, or extinct volcanoes, whose geologic histories are characteristic of "hot spot" volcanism.
 

USGS
April 7, 1995

April 10th marks the aniversary of the 1926 eruption of Mauna Loa Volcano. The eruption was preceded by several widely felt earthquakes about one hour before the outbreak of lava, and volcanic tremor was recorded on the few seismigraphs installed on the island about a half hour before the felt earthquakes. 
 

Kīlauea eruption status, May 13, 1994...
March 31, 1995

The 12-year long eruption along Kīlauea's east rift zone continued without interruption during the past two weeks. 

Deep earthquakes and lithospheric flexure...
March 24, 1995

Last Sunday evening, March 19, the Hawaiian Islands were shaken by a moderate earthquake located south of Kahoolawe and west of Hawaii. The earthquake occurred at 10:30 p.m., had a magnitude of 4.5, and was located about 30 miles deep.