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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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Nouvelles du volcan Kilauea

Kilauea volcano (Hawai'i): summit crater lake continues to grow slowly

Saturday Apr 04, 2020 00:51 AM | AUTEUR : MATTHEW

The Hawaiian Volcano Observatory have released the monthly update of activity at Kilauea volcano over the month of March.
There were variable rates of seismicity over March, however, the rates were within a range that has been observed over the past year. Sulfur dioxide emission rates at the summit are low and are below detection limits at Puʻu ʻŌʻō and the lower East Rift Zone. As of March 19th, the dimensions of the water pond at the bottom of Halema'uma'u are approximately 107 meters (~351 feet) by 211 meters (~692 feet). This is a growth of 7 meters (22 feet) by 11 meters (36 feet) since the last update (March 6th) As of April 1st, the current depth is approximately 32 meters (105 feet). The pond has therefore deepened by 4 meters (13 feet)

Over the past month, the summit tiltmeter recorded 10 deflation-inflation events, a number similar to January and February. Since March 2019, GPS stations and tiltmeters at the Kilauea summit have recorded deformation which HVO state is consistent with slow magma accumulation within the shallow portion of the Kilauea summit magma system (1-2 km or approximately 1 mile below ground level). There is continued low levels of sulfur dioxide emissions from the Halema'uma'u area, consistent with no significant shallowing of magma. HVO note that some of the sulfur dioxide is being dissolved into the summit lake.

Along the East Rift Zone, HVO GPS stations and tiltmeters continue to show motions consistent with slowed refilling of the deep East Rift Zone magmatic reservoir in the broad region between Puʻu ʻŌʻō and Highway 130. GPS station JOKA, and tilt station JKA, in the lower East Rift Zone, experienced an episode of deformation from March 14-26th with a different direction from the longer term trend. Data retrieved manually in the next few weeks may provide more insight. The south flank of Kilauea continues to creep seaward at elevated rates following the May 4, 2018 M6.9 earthquake near Kalapana.

“Although not currently erupting, areas of persistently elevated ground temperatures and minor release of gases are still found in the vicinity of the 2018 lower East Rift Zone fissures. These include steam (water), very small amounts of hydrogen sulfide, and carbon dioxide. These conditions are expected to be long-term. Similar conditions following the 1955 eruption continued for years to decades.”

“Hazards: Hazards remain in the lower East Rift Zone eruption area and at the Kilauea summit. Residents and visitors near the 2018 fissures, lava flows, and summit collapse area should heed Hawaii County Civil Defense and National Park warnings. Lava flows and features created by the 2018 eruption are primarily on private property and persons are asked to be respectful and not enter or park on private property.”
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Source:
  • https://volcanoes.usgs.gov/vhp/updates.html#calvo
Actualités précédentes
Friday, Mar 06, 2020
The Hawaiian Volcano Observatory (HVO) report that over the past month at Kilauea volcano, the rates of seismicity varied but within a range observed over the past year. Sulfur dioxide emission rates have been low at the summit and below detection limits at Puʻu ʻŌʻō and the lower East Rift Zone. The water pond at the bottom of Halema'uma'u continues to slowly expand and deepen and its dimensions are approximately 100 meters (330 feet) by 200 meters (660 feet) and approximately 28 meters or 92 feet deep as of early March. ... lire toutes
Thursday, Feb 06, 2020
Over the past month, rates of seismicity were variable but within long term vales. Sulfur dioxide emission rates are low at the summit and are below detection limits at Puʻu ʻŌʻō and the lower East Rift Zone. The pond at the bottom of Halema'uma'u, which began forming on July 25, 2019, continues to slowly expand and deepen. The pond has grown 95 meters by 194 meters (310 feet by 640 feet) and 25 meters (82 feet) deep. The pond has deepened by 2 meters (around 7 feet) over the month of January 2020. ... lire toutes
Sunday, Jan 12, 2020
The Hawaiian Volcano Observatory (HVO) note that the rates of seismicity over the month of December 2019 were variable but within long term vales. Sulfur dioxide emission rates were low at the summit and were below detection limits at Puʻu ʻŌʻō and the lower East Rift Zone. The pond at the bottom of Halema'uma'u crater, which began forming on July 25, 2019, continues to slowly expand and deepen. As of early January 2020, the dimensions of the pond are 84 meters by 190 meters (280 feet by 620 feet). Current depth is about 23 meters (75 feet). ... lire toutes
Sunday, Dec 08, 2019
The Hawaiian Volcano Observatory (HVO) report that their monitoring data have shown no significant changes in volcanic activity during November. Over the past month, about a dozen DI (Deflation-Inflation) events occurred beneath the summit. Over 1800 earthquakes were detected in the vicinity of the volcano, which is an increase of around 10% from last month. Rates of seismicity are relatively consistent throughout the month, although at the summit, episodic increased rates appear to be coincident with the inflated phase of the DI events. Sulfur dioxide emission rates are low at the summit and are below detection limits at Puʻu ʻOʻo and the lower East Rift Zone. The pond at the bottom of Halema'uma'u, which began forming on July 25, 2019, continues to slowly expand and deepen, and the most recent measurements are 162 meters in the east-west direction and 73 meters in the north-south direction. ... lire toutes
Sunday, Nov 17, 2019
Kilauea volcano is still currently not erupting. The sulfur dioxide emission rates at summit of the volcano is low with steady rates of ground deformation and seismicity. The crater lake inside Halema'uma'u continues to grow slowly. ... lire toutes

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