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Kilauea volcan
Shield volcano 1277 m (4,190 ft)
Hawai'i, 19.41°N / -155.29°W
Condition actuelle: normal / en sommeil (1 sur 5)
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Eruptions du volcan Kilauea:
Near-continuous eruptions. Since 1960: 1961 (4x), 1962, 1963 (2x), 1965 (2x), 1967-68, 1968 (2x), 1969, 1969-74, 1971 (2x), 1973 (2x), 1974 (3x), 1975, 1977, 1979, 1980, 1982 (2x), 1983-2008 (ongoing)
Style éruptif tipique:
Dominant effusive depuis 1790, mais ~ de 60% au cours des derniers explosive ~ 2500 ans.
Derniers séismes proches
Voyages au volcan Kilauea
Hawaii - Birthplace of Islands (14 days walking and study tour to Oahu, Kauai, Maui, Hawai'i)
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Volcan Kilauea assis par la NASA (C)

 

Nouvelles du volcan Kilauea

Kilauea volcano update: Summit caldera: continued inward slumping of Halema’uma’u crater and seismic cycles

Thursday Jun 14, 2018 13:14 PM | IS

This aerial overview of June 12, 2018, shows the dramatic change that Halema‘uma‘u vent underwent over the past few weeks. The image looks west across the crater, with the former Halema‘uma‘u crater floor in the center and the deepest part in the foreground. Ground cracks circumferential to the crater rim can be seen cutting across the parking lot (left). (HVO/USGS)
This aerial overview of June 12, 2018, shows the dramatic change that Halema‘uma‘u vent underwent over the past few weeks. The image looks west across the crater, with the former Halema‘uma‘u crater floor in the center and the deepest part in the foreground. Ground cracks circumferential to the crater rim can be seen cutting across the parking lot (left). (HVO/USGS)
A closer view of the cracks cutting across the parking lot for the former Halema‘uma‘u visitor overlook (closed since 2008, when an active vent opened within the crater). (HVO/USGS)
A closer view of the cracks cutting across the parking lot for the former Halema‘uma‘u visitor overlook (closed since 2008, when an active vent opened within the crater). (HVO/USGS)
Diagram of the frequency, size and depth of earthquakes registered at Kilauea volcano showing the seismic cycles that occur at the summit (VolcanoDiscovery)
Diagram of the frequency, size and depth of earthquakes registered at Kilauea volcano showing the seismic cycles that occur at the summit (VolcanoDiscovery)
Day by day, Kilauea’s summit caldera continues to subside and Halema‘uma‘u crater keeps crumbling with every explosive event. Over the past week, such explosions occurred once per day and have been registered as magnitude 5+ earthquakes. They are however not typical earthquakes at all since there is no major fault-rupturing event. Instead, pressure builds up beneath the rubble pile that is choking the conduit and is released as an explosion – a continuous seismic cycle.

HVO/USGS released new images of the dramatic changes that have occurred Halema‘uma‘u crater in the past couple weeks. The crater’s steep walls continue to slump inward and downward in response to the ongoing summit subsidence. The former Halema‘uma‘u crater floor has subsided at least 100 m (about 300 ft) and the deepest part of Halema‘uma‘u is now about 300 m (1,000 ft) below the crater rim. Circumferential to the crater rim there are both newly formed and growing ground cracks which are by now cutting across the parking lot of the former Halema‘uma‘u visitor overlook, which was closed in 2008 when a lava lake re-appeared in the crater.

Sulfur dioxide emissions from the volcano's summit have dropped to levels that are about half those measured prior to the onset of the current episode of eruptive activity. This gas and minor amounts of ash are being transported downwind, with small bursts of ash and gas accompanying intermittent explosive activity. (HVO/UGS)
Actualités précédentes
Wednesday, Jun 13, 2018
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [details]
The three closely spaced lava fountains at fissure 8 are building a cinder-and-spatter cone around the erupting vent through downwind accumulation of lava fragments falling from the fountains. (HVO/USGS)
Tuesday, Jun 12, 2018
Kilauea’s eruption in the lower East Rift Zone continues without showing any signs of weakening. The current activity has been sustained for 38 days now, 2 days longer than the last fissure eruption that occurred in this area in 1960. However, compared to the rapid change of activity locations and advancing lava flow fronts, the eruption seems to have geographically settled for the past week. ... [details]
Tuesday, Jun 12, 2018
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [details]
Monday, Jun 11, 2018
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [details]
Sunday, Jun 10, 2018
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: ... [details]

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