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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
La Palma / Cumbre Vieja - activity increasing as of 07.10.2021 - photo InVolcan

La Palma / Cumbre Vieja - activity increasing as of 07.10.2021 - photo InVolcan

La Palma / Cumbre Vieja - image Sentinel-2 bands 12,11,4 from 07.10.2021

La Palma / Cumbre Vieja - image Sentinel-2 bands 12,11,4 from 07.10.2021

Seismic activity is on the rise again this October 7 in La Palma / Cumbre Vieja, both in number of earthquakes and in their magnitude. However, there is no parameter indicating the opening of a new transmitting center far from the active cone.

A new arm of lava flow has separated from the main flow, and descends the cliff 750 meters further south advancing on the old platform created by the San Juan volcano in 1949, at Las Hoyas. It leads to further destruction of crops and structures over approximately 10ha.

La Palma / Cumbre Vieja - new flow and flooding of the Las Hoyas platform on 07.10.2021 - photo El Time .es

La Palma / Cumbre Vieja - new flow and flooding of the Las Hoyas platform on 07.10.2021 - photo El Time .es

The activity has become more explosive in recent hours, characterized by an increase in tremor.

Following an inversion, the air quality deteriorated sharply; the situation will continue until October 9th. It affects La Palma airport which is temporarily closed.

This October 8, we can see on the RTVC webcam a collapse at the level of the cone, which releases a beautiful lava flow.

 

Sources: InVolcan, IGNes, RTVC, El Time, es

La Palma / Cumbre Vieja - RSAM and variations of the tremor at 07.11.2021 - Doc. IGNes and InVolcan - one click to enlargeLa Palma / Cumbre Vieja - RSAM and variations of the tremor at 07.11.2021 - Doc. IGNes and InVolcan - one click to enlarge

La Palma / Cumbre Vieja - RSAM and variations of the tremor at 07.11.2021 - Doc. IGNes and InVolcan - one click to enlarge

La Palma - thermal anomalies at 08.10.2021 / 03:45 - Doc. Mirova _MODIS_logVRP

La Palma - thermal anomalies at 08.10.2021 / 03:45 - Doc. Mirova _MODIS_logVRP

During the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 96 exhalations accompanied by water vapor, volcanic gases and small amounts of ash have been identified.

In addition, 74 minutes of tremors and four explosions were recorded: two moderate, recorded on October 6 at 10:44 am and 9:42 pm; two minors, the first yesterday at 5:57 p.m. and the second on October 7 at 1:17 a.m.

The alert remains at Amarillo Fase 2.

 

Source: Cenapred

Popocatépetl - explosion of 07.10.2021 / 01h18 - WebcamsdeMexico

Popocatépetl - explosion of 07.10.2021 / 01h18 - WebcamsdeMexico

The activity of Villarica, on Green Technical Alert, presented in September a decrease in monitoring parameters compared to previous months, suggesting a stabilization of the internal dynamics of the volcanic system. The decrease in LP earthquakes, less detection of thermal anomalies, and the absence of acoustic signals suggest that the lava lake remains at a deep level.

The open duct situation and the fluctuating behavior of the lava lake could cause explosions to affect the surroundings of the crater within a radius of 100 meters.

 

Source: Sernageomin

Villarica - light fumaroles and calm situation at 07.10.2021 - photo Laura Angarita / twitter

Villarica - light fumaroles and calm situation at 07.10.2021 - photo Laura Angarita / twitter

In Kilauea, since the morning of October 7, 2021, lava continues to emerge from two vents: one along the floor and one in the western wall of Halema'uma'u crater. All lava activity is confined to this crater.

Over the past 24 hours, the level of the lava lake has risen by about 1 meter with a total rise of about 32 meters since the lava emerged on September 29. The total thickness of the lava filling Halema'uma'u is now 258 meters with an elevation of the lake surface of about 775 meters above sea level. The western vent continues to have the fountain the most vigorous with sustained lava fountain heights of about 12 meters.

Due to the location of the vents, the lava lake is not the same level over its entire surface. Areas closer to the vent in the western part have an elevation about 2m higher than the northern and southern parts of the lake and 4m higher than the eastern end of the lava lake.

Current level of volcanic alert: WATCH
Current aviation code: ORANGE

 

Source: HVO-USGS

The lava lake of Halema'uma'u with the two main vents that feed it. The color of the surface of the lake seems to delineate the vent from which the lava spread, the lava from the west vent being more silvery while that from the south vent is darker.- photo Bruce Omori 10.2021 / ExtremeExposure / Paradise Helicopters

The lava lake of Halema'uma'u with the two main vents that feed it. The color of the surface of the lake seems to delineate the vent from which the lava spread, the lava from the west vent being more silvery while that from the south vent is darker.- photo Bruce Omori 10.2021 / ExtremeExposure / Paradise Helicopters

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