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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity
2022.01.03  12h25 - Semeru- panache éruptif du 03.01.2022 / 12h44 WIB - Doc. PVMBG / Magma Indonesia

2022.01.03 12h25 - Semeru- panache éruptif du 03.01.2022 / 12h44 WIB - Doc. PVMBG / Magma Indonesia

An eruptive episode was reported to Semeru on Monday January 03, 2022 at 12:25 WIB, accompanied by a plume of gas and gray ash observed at ± 200 m above the summit (± 3876 m above sea level). This eruption was recorded on a seismograph, with a maximum amplitude of 25 mm and a duration of 1260 seconds.

The level of activity is at 3 / siaga, with recommendations not to exercise any activity in the southeast sector along the Besuk Kobokan, up to 13 km from the summit (center of the eruption). Beyond this distance, the community does not conduct activities within 500 meters of the embankment (border of the river) along Besuk Kobokan due to the potential for expansion of hot clouds and lava flows. lava up to a distance of 17 km from the summit.
 

In addition, do not move within a radius of 5 km from the crater / peak of Mount Semeru because there is a risk of receiving incandescent projections.

 

Source: PVMBG, Magma Indonesia

On the afternoon of December 27, 2021, the summit eruption of Kīlauea was paused and showed only intermittent and weak crustal foundering in the formerly active west side of the lava lake in Halema‘uma‘u. - photo K. Lynn / HVO

On the afternoon of December 27, 2021, the summit eruption of Kīlauea was paused and showed only intermittent and weak crustal foundering in the formerly active west side of the lava lake in Halema‘uma‘u. - photo K. Lynn / HVO

The "stop and more" of Kilauea:

Lava returned to the western vent of Halema'uma'u crater at 2:45 p.m. on 31.12.2021 The eruption atop Kīlauea volcano continued for the past 24 hours. All recent lava activity has been confined to the crater.

The lava lake surface is active again, with several large overflows on the older lake crust in the evening. A strong glow was visible in the evening sky from the volcano to Lower Puna.

Summit tiltmeters have recorded a flat tilt over the past 24 hours. The volcanic quake associated with the eruption, as recorded by nearby seismometers, remained stable. Seismic activity in the summit region remains below the bottom level.

 Kilauea western edge of the caldera - radial tilt at Uwekahuna station (UWE) at 01.02.2022 - Doc. HVO

Kilauea western edge of the caldera - radial tilt at Uwekahuna station (UWE) at 01.02.2022 - Doc. HVO

This January 3, 2022, the Kīlauea volcano entered a pause. Lava is still erupting, but at a greatly reduced rate, from a single vent near the western wall of Halema'uma'u Crater, in the volcano summit area and in Hawaii Volcanoes National Park 'i.
The decrease in lava outflow from the West Halema'uma'u Vent into the active lava lake is indicated by the formation of a cooler crust over most of the lake except at the vent and Decreasing lava velocities measured on the thermal camera. The active lake began to crumble around 2 a.m. at the same time as the tremor was diminishing. No overflow from the active lake has been observed in the past 24 hours, but there has been a significant breakout along the northern margin of the largest crusted lava lake that was still active this morning.
Summit tiltmeters have been tracking rapid deflation since 1 a.m. this morning. The tremor associated with the eruption, as recorded by nearby seismometers, subsided rapidly around 2 a.m. and continues at low levels.

Current volcano alert level: Watch
Current Aviation Color Code: Orange

 

Source: HVO-USGS

Hunga Tonga- Hunga Ha'apai - 12.30.2021 - photo Tonga Geological Services, Government of Tonga.- one click to enlarge

Hunga Tonga- Hunga Ha'apai - 12.30.2021 - photo Tonga Geological Services, Government of Tonga.- one click to enlarge

According to the report by Tonga Geological Services, Government of Tonga, on January 1, 2022 / 8:00 a.m., the eruption continues intermittently on Hunga-Tonga-Hunga-Ha'apai Island.

The volcanic plumes / clouds observed on the satellite images captured between 12:00 p.m. on 01/01/2022 yesterday and 6:30 a.m. on 01/02/2022 this morning are as follows:
Intermittent volcanic steam / gas eruptions continued at 2:40 p.m. yesterday, forming plumes drifting east from HTHH across the 'Otu Mu'omu'a islands of the Ha'apai group at an estimated elevation of 12 km asl.

Steam / gas plumes at 7:00 p.m. yesterday until 6:00 a.m. drifted east-southeast through the waters of northern Tongatapu.

The last steam / volcanic gas plume detected at 6:00 am this morning is drifting east to southeast through the waters of Tongatapu.

No volcanic ash / dust has been detected since 12:00 yesterday.

The discoloration of the sea shows a significant release of volcanic fluids (steam, condensates loaded with chemical elements) into the sea and contaminating sea water.

 

Source: Tonga Geological Services, Government of Tonga.

La Palma / Cumbre Vieja - degassing on 02.01.2022 - photo InVolcan

La Palma / Cumbre Vieja - degassing on 02.01.2022 - photo InVolcan

In La Palma, the activity of Cumbre Vieja is limited to degassing and deposits of native sulfur and other salts on its sides ... the phenomenon is normal.

The oversight by the teams of volcanologists is not slackening; they continue to study gas fumes, and measure the elevated temperature of various vents and cracks by thermography.

The DSN authorizes the return of a thousand evacuees to their homes in various areas of el Paso, los Llanos de aridane, Tazacorte and Fuencaliente from 9 a.m. on January 3, 2022, if the security conditions are met.

 

Sources: InVolcan, DSN

 Cumbre Vieja  - Gaz sampling in one of the craters 28.12.2021 - Photo InVolcan

Cumbre Vieja - Gaz sampling in one of the craters 28.12.2021 - Photo InVolcan

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