Tag Archive | "volcano watch"

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Volcano Watch: Now is an exciting time at Kīlauea

This is, without a doubt, the most intellectually exciting time to be a volcanologist at the USGS Hawaiian Volcano Observatory.

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A close-up of the Unmanned Aircraft System (UAS) used by USGS scientists to measure volcanic gases in remote areas of Kīlauea. The fissure 21 cone is visible in the far right background. Photo taken Monday, November 26, 2018 courtesy of U.S. Geological Survey

Volcano Watch: Kilauea activity update for November 29, 2018

Deformation signals are consistent with slow refilling the middle East Rift Zone. At the summit, tiltmeters showed little significant change this week.

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Volcano Watch: Kilauea activity update for November 21, 2018

Kīlauea is not erupting. At the summit, tiltmeters showed little change this week, except for a small deflation-inflation sequence.

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Volcano Watch: We’re giving thanks for clean air, but what’s that new smell?

With these much lower emissions, many people have expressed surprise that a strong and slightly unfamiliar smell can be detected from Kīlauea during certain wind conditions.

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Volcano Watch: The Hawaiian Volcano Observatory adapts to recent changes

Has it already been six months since lava began flowing through Hawai`i County’s lower Puna district?

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Volcano Watch: Kilauea activity update for November 15, 2018

Kīlauea is not erupting. Low rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Panorama of the Kīlauea Caldera Wide Angle from HVO Observation Tower. November 7, 2018. Images courtesy of USGS/HVO

Volcano Watch: Kilauea activity update for November 8, 2018

Kīlauea is not erupting. Low rates of seismicity, deformation, and gas release have not changed significantly over the past week.

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Kīlauea Volcano's summit, as viewed from the southwest, shows the collapsed area of Halema‘uma‘u and the adjacent caldera floor. A section of Crater Rim Drive preserved on a down-dropped block is visible at the far right. Volcanic gases rising from magma stored beneath the summit continue to escape to the surface, as they have for as long as Kīlauea has existed, resulting in deposits of sulfur on the crater walls.

Volcano Watch: Kilauea activity update for November 1, 2018

A slight inflationary trend near and east of Puʻu ʻŌʻō suggests that magma may be refilling the middle East Rift Zone. Low seismicity and reduced gas emissions do not indicate that the magma is shallow, but HVO continues to closely monitor this area and will report any significant changes.

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Bright red polygon features were drawn by USGS Geographic Information Systems (GIS) analysts around new or active lower East Rift Zone lava flows, which appear lighter in color due to their high temperature on this thermal map. Collected during a helicopter overflight on May 9, 2018, this map shows fissures 6 (left) and 15 (right) with Pohoiki Road passing between the two vents. USGS map.

Volcano Watch: How are lava-flow maps made during an eruption?

Computer programs known as Geographic Information Systems (GIS) have been the preferred tool of USGS cartographers for many years. Using commercial GIS software, the user creates a stack of “layers,” such as labels, roads, and political boundaries that together form a map.

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In this panoramic view, Hawaiʻi Volcanoes National Park’s Crater Rim Drive (left foreground) disappears into the enormous void created by the collapse of Halema‘uma‘u and portions of the Kīlauea caldera floor during the dramatic events at the summit of the volcano in May-August 2018. USGS photo by D. Dzurisin.

Volcano Watch: Kīlauea 2018 events mark a watershed for volcano science

The 2018 summit collapse and lower East Rift Zone eruption at Kīlauea Volcano were dramatic and, for many Island of Hawaiʻi residents, tragic events. As with all eruptive crises, these events offered exceptional opportunities to learn more about how volcanoes work and to answer some “bigger picture” questions.

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Volcano Watch: Kilauea activity update for October 25, 2018

A slight inflationary trend near and east of Puʻu ʻŌʻō suggests that magma may be refilling the middle East Rift Zone. Low seismicity and reduced gas emissions do not indicate that the magma is shallow, but HVO continues to closely monitor this area and will report any significant changes.

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Volcano Watch: Kīlauea hazard assessments include analyses of salts on volcanic ash

Upon contact with water, either through ash falling into water catchments or by rain falling on ash, the soluble components are washed from the ash.

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Low sulfur dioxide gas emissions on Kīlauea have resulted in greatly diminished vog (volcanic air pollution) in Hawaii, giving rise to spectacular views on the island. Here, looking across the field of lava erupted from Kīlauea's lower East Rift Zone this past summer, the shield-shaped profiles of Mauna Loa (left) and Mauna Kea (right) can be clearly seen in the far distance. Photo taken Wednesday, October 10, 2018 courtesy of U.S. Geological Survey

Volcano Watch: Kilauea activity update for October 18, 2018

Kīlauea is not erupting. Summit and East Rift Zone activity are greatly reduced, with low rates of seismicity, deformation, and gas emissions recorded this past week.

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Volcano Watch: Aftershocks of the 2018 magnitude-6.9 earthquake expected to continue

What causes these earthquakes, and how long will they last?

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