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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
Kilauea - Halema'uma'u - spatterring on the northeast margin of the lava lake - photo 09.09.2022 / C.Parcheta - USGS - one click to enlarge

Kilauea - Halema'uma'u - spatterring on the northeast margin of the lava lake - photo 09.09.2022 / C.Parcheta - USGS - one click to enlarge

The eruption at Kīlauea Volcano's summit in Halema'uma'u Crater has continued for the past 24 hours. All recent eruptive activity has been confined to the crater.
The active part of the lava lake showed continued surface activity.

Field crews monitoring the lava lake at the summit of Kīlauea at Halema'uma'u on the morning of September 9, 2022, observed lapping on the northeast margin of the lake which produced splashes/spatters, shown in the picture above. The spatters were thrown up to 10 m in the air before falling back on the crust of the lava lake.

Flyby measurements from August 16, 2022 indicated that the crater floor had experienced a total elevation of about 137 meters (449 feet) and that 104 million cubic meters (27.5 billion gallons) of lava had been spilled since. the start of this eruption on September 29, 2021.

Summit tiltmeters recorded relatively little ground deformation over the past 24 hours. Volcanic tremor remains above background levels. A sulfur dioxide (SO2) emission rate of approximately 2,000 tonnes per day (t/d) was measured on September 6, 2022.

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

 

Source: HVO-USGS

The Cumbal Volcanic Complex - photo and captions SGC / Ingeominas - one click to enlarge

The Cumbal Volcanic Complex - photo and captions SGC / Ingeominas - one click to enlarge

Cumbal VC - the small plume (center) is from La Plazuela crater, while the larger plume (right) is attributed to the El Verde fumarolic field. - Doctor. SGC / Ingeominas archives - one click to enlarge

Cumbal VC - the small plume (center) is from La Plazuela crater, while the larger plume (right) is attributed to the El Verde fumarolic field. - Doctor. SGC / Ingeominas archives - one click to enlarge

For the month of August, the seismic occurrence of the Cumbal volcanic complex, in Colombia, showed a decrease compared to July, going from 1,503 to 1,268 events, most of these earthquakes were related to the fracture of the rock of the volcanic edifice (VT earthquakes).
For 10.6% of all earthquakes, an association with
movements of fluids inside volcanic conduits, attributed ate (earthquakes of the LP type).
In general, the energy released by the earthquakes recorded in August showed a decrease compared to July.

The degassing of the volcano could be observed, mainly from the fumarolic fields El Verde (east of the crater La Plazuela, in the volcanic building of Cumbal), Rastrojos, Boca Vieja and Las Bandas (southwest of the crater of the volcanic edifice of Mundo Nuevo), with white columns, of variable height and dispersion depending on the prevailing direction of the winds in the region.

The other geophysical and geochemical parameters of the volcanic monitoring maintained a stable behavior.

 

The assessment of the activity of the Cumbal Volcanic Complex for August 2022 has maintained the YELLOW level (III) / "Changes in the behavior of volcanic activity".

 

Source: SGC

Descabezado Grande volcanic complex - Sernageomin image - one click to enlarge

Descabezado Grande volcanic complex - Sernageomin image - one click to enlarge

The Sernageomin monitoring stations installed near the Descabezado Grande Volcanic Complex recorded today, September 10 at 03:03 a.m., a volcano-tectonic earthquake associated with rock fracturing. Its local magnitude is 4.3, at a depth of 3 km.

The summit of the Descabezado Grande volcano is truncated by a 1.4 km wide ice-filled summit crater, hence its name, which means " big headless volcano ".

The only historical eruption of this Late Pleistocene to Holocene volcano, seen here from the west, occurred in 1932 from a vent on the upper NNE flank. The 1932 crater lies out of sight below and to the left of the notch on the left side of the summit crater.

The technical alert remains green

 

Sources: Sernageomin & Global Volcanism Program

Guayota La Palma - as of 09.09.2022 - carbon dioxide flux for the past 30 days at 3x baseline - Doc. InVolcano

Guayota La Palma - as of 09.09.2022 - carbon dioxide flux for the past 30 days at 3x baseline - Doc. InVolcano

The personnel of the Volcanological Institute of the Canary Islands (INVOLCAN) carried out today, Friday September 9, measurements of the concentration of carbon dioxide (CO2) and oxygen (O2) in the indoor ambient air of the houses ground floors (floor 0) and garages (floor -1) in PuertoNaos, on the island of La Palma.

Up to 40% CO2 and 12% O2 were measured in garages and 20% CO2 and 18% O2 in ground floors. These concentrations of CO2 are deadly.

 

Source: InVolcan

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