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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

The last eruption of Sinabung, on Sumatra, occurred on June 4, 2021 and the height of the eruptive column was not observed.


On June 5, the dome was clearly visible; it was topped with a light plume of gas. Thanks to Endro for the recent photos.

Thanks to the seismographic recordings of June 5, 2021, it was recorded: 1 -1 low frequency earthquake
- 55 times the hybrid / multiphase earthquake
- 2 times the deep volcanic earthquake
- 1 local tectonic earthquake
- 1 distant tectonic earthquake.

Note a different seismicity since mid-May 2021.

Sinabung - the summit on 06.05.2021 - photo Endro Rusharyanto - one click to enlarge

Sinabung - the summit on 06.05.2021 - photo Endro Rusharyanto - one click to enlarge

Sinabung - the summit on 06.05.2021 from another angle- photo Endro Rusharyanto - one click to enlarge

Sinabung - the summit on 06.05.2021 from another angle- photo Endro Rusharyanto - one click to enlarge

Sinabung -  seismicity at 05.06.2021 - Doc. PVMBG / Magma Indonesia - one click to enlarge

Sinabung - seismicity at 05.06.2021 - Doc. PVMBG / Magma Indonesia - one click to enlarge

The activity level remains at 3 / siaga. The last VONA sent the color code Orange, published on June 3, 2021, at 8:05 p.m. WIB. Volcanic ash is not observed because it is covered with fog.

The community and visitors / tourists should not conduct activities in the relocated villages, as well as the locations within a radial radius of 3 km from the summit of Mount Sinabung, as well as a sector radius of 5 km for the southern sector. east, and 4 km for the northeast sector.
In the event of ash fallout, people are advised to wear masks when leaving home to reduce the health impact of volcanic ash and to secure drinking water facilities and clean house roofs from ash. thick volcanic so they do not collapse
People who live and live near the rivers that originate at Mount Sinabung should remain vigilant against the dangers of lahars.

 

Sources: PVMBG, Magma Indonesia and photos of Endro Rusharyento.

Taal volcano island - gas and steam plume - photo archives co ABS-CBN News 24.05.2021

Taal volcano island - gas and steam plume - photo archives co ABS-CBN News 24.05.2021

During the last 24 hours, the seismic network of the Taal volcano has not detected any volcanic earthquakes, however, a low-level background quake has persisted since April 8, 2021. The activity of the main crater has been dominated by the rise of hot volcanic fluids in its lake which generated plumes of 500 meters high which drifted towards the south-east. Sulfur dioxide (SO2) emissions averaged 1,898 tonnes / day on June 5, 2021.

The island of the Taal volcano started to deflate in April 2021 while the Taal region is swelling and expanding very slowly and steadily at a decreasing rate since the eruption of 2020. These parameters indicate a decrease in magmatic activity deep under the building.

Despite the insistence of local authorities to lower it, alert level 2 (increased unrest) is currently maintained on the Taal volcano. DOST-PHIVOLCS reminds the public that at Alert Level 2, sudden steam or phreatic explosions, volcanic earthquakes, minor ash falls and fatal accumulations or expulsions of volcanic gas can occur and threaten areas in and around TVI. DOST-PHIVOLCS strongly recommends that entry be strictly prohibited into the volcanic island of Taal, the permanent danger zone or PDZ of Taal, especially the surroundings of the main crater and Daang Kastila fissure, as well as the occupation and boating on Taal Lake

 

Sources: Phivolcs and Manilla Times

This view from the top of Mauna Loa looks northeast. The eastern flank of Mauna Kea is to the left, and North Pit, at the northeast end of Moku'āweoweo, is opposite - HVO-USGS photo - one click to enlarge

This view from the top of Mauna Loa looks northeast. The eastern flank of Mauna Kea is to the left, and North Pit, at the northeast end of Moku'āweoweo, is opposite - HVO-USGS photo - one click to enlarge

Mauna Loa volcano on Big Island / Hawaii is not erupting. The current level of volcanic alert remains at Advisory and the aviation code at Yellow.

Seismicity rates at the summit remain slightly high and above long-term background levels, with around 55 low-magnitude earthquakes below Mauna Loa, most concentrated below the summit and elevation flanks of the volcano. All of the earthquakes last week were below M3 and mostly occurred at depths less than 8 km (about 5 mi) below ground level.
Other Mauna Loa monitoring data feeds show no significant changes in deformation rates or patterns that would indicate increased volcanic risk at present.
Gas concentrations (below 2 ppm SO2) and fumarole temperatures (below 100 degrees Celsius) at the summit and Sulfur Cone in the southwest rift zone remain stable.

 

Source: HVO-USGS

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