Overblog
Editer l'article Suivre ce blog Administration + Créer mon blog

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
Piton de La Fournaise - image Sentinel-2 bands 12,11,4 from 01.01.2022 - One click to enlarge

Piton de La Fournaise - image Sentinel-2 bands 12,11,4 from 01.01.2022 - One click to enlarge

The eruption that began on 12/22/2021 at around 3:30 a.m. local time at Piton de La Fournaise continues.

Over the last 24 hours the amplitude of the eruptive tremor (indicator of an emission of lava on the surface) still shows fluctuations. The average amplitude of the tremor is around 80% of its initial amplitude on Saturday January 1, to decrease slightly on January 2 to 60% of its starting amplitude.

Piton de La Fournaise - Evolution of the RSAM (indicator of a surface lava emission) between 12/21/2021 10:00 p.m. local time (6:00 p.m. UT) and 01/02/2022 9:00 a.m. (local time, 5:00 UTC time on the FOR seismological station located at the level of the Château Fort crater (© OVPF / IPGP).

Piton de La Fournaise - Evolution of the RSAM (indicator of a surface lava emission) between 12/21/2021 10:00 p.m. local time (6:00 p.m. UT) and 01/02/2022 9:00 a.m. (local time, 5:00 UTC time on the FOR seismological station located at the level of the Château Fort crater (© OVPF / IPGP).

Piton de La Fournaise - Eruptive cone and lava flows  01.01.2022 / 01h56TU - webcam Piton de Bert 2 / OVPF

Piton de La Fournaise - Eruptive cone and lava flows 01.01.2022 / 01h56TU - webcam Piton de Bert 2 / OVPF

Thanks to clearings in the morning of January 1, 2022, observations were made. These latest observations still show lava fountain activity within the cone that has built up since the start of the eruption.

Videos from the OVPF-IPGP-IRT webcams last night show activity with lava fountains occasionally exceeding the height of the cone. Numerous resurgences of lava flows are sporadically visible on the roof of the lava tunnel that has developed downstream from the cone

Piton de La Fournaise - the eruptive cone and its fountaining activity on 01.02.2022 / 02h00 UT- Webcam Bert 2 / OVPF

Piton de La Fournaise - the eruptive cone and its fountaining activity on 01.02.2022 / 02h00 UT- Webcam Bert 2 / OVPF

Over the last 24 hours:

Two low magnitude (<1) volcano-tectonic earthquakes were recorded below the summit.

The surface deformations no longer show significant signals.

The CO2 concentrations in the soil in the Gîte du volcan sector have been increasing for several days. This parameter will be monitored over the next few days because it may be linked to the arrival of new magma, coming from deeper areas, at the level of the surface reservoir.

Lava flows could be estimated by satellite method with the HOTVOLC platform (OPGC - Clermont Auvergne University). They were between 2 and 7 m3 / sec. These variations are explained by the method, which relies on the infrared radiation of the flow, the perception of which by satellites can be greatly influenced by the weather conditions above the flows as well as the surface conditions of the flows. No assessment of the position of the flow front could be made. But given the relief with gently sloping slopes in the area, the lava field continues to extend mainly laterally and by thickening at the level of the network of lava tunnels set up on the plateau downstream of the eruptive cone.

Alert level: Alert 2-1 (eruption in the enclosure)

 

Source: OVPF - IPGP– 01/01/2022 - 4:00 p.m. local time - 12:00 p.m. UTC

Find all the information relating to Piton de la Fournaise's activity on the various OVPF-IPGP media: - the website: ipgp.fr/fr/ovpf/actualites-ovpf - the Twitter account: twitter. com / obsfournaise - the Facebook account: facebook.com/ObsVolcanoPitonFournaise

Nyiragongo - threats to Goma - 12.21.2021 - Photo Ch. Balagizi / OVG

Nyiragongo - threats to Goma - 12.21.2021 - Photo Ch. Balagizi / OVG

The latest report from the Goma Volcanological Observatory (OVG) from 2021 disturbs the atmosphere of the end-of-year festivities

Volcanic activity is currently intense on the southern flank (Side) of Nyiragongo, which overlooks the city of Goma.

Observations from various field missions carried out during this period (December 23-29) show that activity is concentrated between Kibati, Shaheru and Mudjoga, OVG said.

"We observe white and bluish fumaroles and intense heat. In other places of the area, we observe collapses and a smell of sulfur dioxide is felt," said the OVG in a press release dating from this December 29.

The level of the volcanic tremor is also very high at the Nyiragongo summit, Kibati, Rusayo and Bulengo stations, OVG reports.

"The threat posed by Mount Nyiragongo has increased since the eruption. New fractures have opened in the ground which could be gates for new lava flows reaching Goma," said Charles Balagizi of the GVO. "

The scientific office therefore sensitizes the inhabitants of Goma and the periphery to vigilance. '' We advise the population of Goma and the surrounding area to observe the strict rules of hygiene in front of hands and vegetables, covering food and dishes and not to use rain and lake water not treated as drinking water and to report to us any abnormal phenomenon observed in connection with the volcano. "

 

Source: OVG & Charles Balagizi

Hunga-Tonga-Hunga-Ha'apai - Eruption of 12/30/2021 - video Taaniela Kula

The eruption of Hunga Tonga-Hunga Ha 'Apai continues.

A drone overflight on December 30 illustrates the activity of Surtsey: ash plumes & cupressoid gas, and surges base which concerns all the emerged parts of the volcano.

VAAC Wellington reports on January 2, 2022 intermittent eruptions and ash emissions; the aviation code is orange.

 

Sources: Video Taaniela Kula on Youtube & VAAC Wellington

Hunga-Tonga-Hunga-Ha'apai - Volcanic ash advisory 02.01.2022 - aviation code orange - VAAC Wellington

Hunga-Tonga-Hunga-Ha'apai - Volcanic ash advisory 02.01.2022 - aviation code orange - VAAC Wellington

The first victims of the Minoan eruption of Santorini in the Bronze Age and the tsunami that followed were found on the coast of Turkey.

According to Vasıf Şahoğlu's team, this would be the first victim directly associated with the cataclysm. "The majority of the work carried out so far on the eruption of Thera has focused on the dating of the event or its geological formation, the phases of the eruption and the distribution of the volcanic ash", underlined the archaeologist. {...} "With this discovery, we see, for the first time, the direct effects of this disaster on humans" The remains of the young man and the dog appeared during an excavation campaign carried out since 2009 on a archaeological site located on the west coast of Turkey.

By studying the deposits, they came to the conclusion that this man and this dog would not have been victims of the ejecta, but from one of the tsunamis caused by the eruption, the young man would show signs of severe trauma. . According to their hypothesis, four giant waves would have struck the Çesme-Bağlararası site in a few days or even weeks.

 

Source : press articles.

Discovery of a skeleton on the Turkish coast, victim of the Santorini tsunami - photo Vasıf Şahoğlu / WorldTech

Discovery of a skeleton on the Turkish coast, victim of the Santorini tsunami - photo Vasıf Şahoğlu / WorldTech

Commenter cet article

Archives

Articles récents

Hébergé par Overblog