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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
Copahue - acid lake - photo archives 2018 Paulo Cesar Fanti 3 via Valecaviahue

Copahue - acid lake - photo archives 2018 Paulo Cesar Fanti 3 via Valecaviahue

 Copahue - alert amarilla - Doc. SERNAGEOMIN

Copahue - alert amarilla - Doc. SERNAGEOMIN

According to information provided by OVDAS - SERNAGEOMIN, in its report of volcanic activity (RAV) of the Copahue volcano, for the period from 01 to 31 March 2019, it is reported that the volcanic activity has presented variations with the appearance and the recording of abundant volcano-tectonic seismicity (VT), which continues an increase in long-period (LP) and very long-lived (VLP) seismicity. In addition, compared to previous months, the lake located in the crater El Agrio has a decrease in its level.

The seismic dynamics and the fluctuation of the water mass housed in the active crater could suggest a new magmatic feed from deeper levels. According to these characteristics exposed during the previous and recent volcanic processes for this volcano, the appearance of an imbalance in the volcanic system is not excluded, which implies the possibility of minor explosions likely to affect the vicinity of the crater and to increase surface activity.

Thus, the technical alert level has reached the amarillo level, with variations in the levels of parameters derived from monitoring indicating that the volcano is above its base threshold and that the process is unstable and can still evolve, by increasing or decreasing. these levels, so a likely rash could develop over a period of weeks or months.

The region of Biobío based on techniques provided by SERNAGEOMIN in coordination with the ONEMI regional office, declares the Alerta Amarilla for the Alto Biobío community because of the activity of the Copahue volcano, valid from this day on and so the conditions justify it. Civil Protection recommends pre-emptively applying access restrictions around the active crater within 500 meters.

With the declaration of the yellow alert, the necessary resources will be gradually integrated in order to intervene according to the evolution of the event in order to prevent its growth and its gravity, thus reducing the negative effects on people, their property and the environment.

Sources: Sernageomin / OVDAs and ONEMI

Lake Taal - a crater lake in a volcanic island located in a caldera, itself in an island ... a typical nest of Filipinos

Lake Taal - a crater lake in a volcanic island located in a caldera, itself in an island ... a typical nest of Filipinos

The seismic networks of the Taal volcano in the Philippines recorded for April 5, 2 volcanic earthquakes, and 3 volcanic earthquakes for April 6.

Field measurements carried out on April 4 showed an increase in water temperature of 31.0 to 31.3 ° C, a 10 cm decrease in lake level and an increase in water acidity with a pH of 2.90 to 2.85.

Light inflation is observed between March 18 and 27.

The alert level of Taal remains at 1 / non-imminent dangerous eruption.

 

Source: Phivolcs

Piton de La Fournaise - entrance to the Enclos Fouqué at the Pas de Bellecombe - photo Bernard Duyck

Piton de La Fournaise - entrance to the Enclos Fouqué at the Pas de Bellecombe - photo Bernard Duyck

At the Piton de la Fournaise: return to the vigilance phase and restricted access to the upper part of the Enclos.

Back to Volcanic Vigilance


Following the findings of the volcanological observatory of the Piton de la Fournaise (OVPF), the field reconnaissance carried out on March 21, 2019 by the services of the OVPF, the office of geological and mining research (BRGM), the national office the High Mountain Gendarmerie (PGHM) and the Indian Ocean Zone and Civil Protection (EMZPCOI) and the residual risks resulting from the last eruption, the Prefect of Réunion has decided to return to the VIGILANCE phase of the Orsec * specific device of the Volcano Piton de la Fournaise starting Friday, April 5, 2019 at 6:00 am.

The security work resulting from the diagnosis as well as the practicability of the trails allow reopening of access to the Fouqué enclosure as of Friday, April 5, 2019 at 6:00 am only on marked trails maintained by the NFB:

• Pas de Bellecombe Trail - Formica Léo - Rivals Trail - Crater Caubet
• Pas de Bellecombe trail - Formica Léo - Dolomieu crater observation trail (access from the north of the crater)

Kapor trails to Piton Kapor and crater Caubet Belvedere on Château Fort remain inaccessible!
Beware the path that borders the northern rampart of the enclosure since Bellecombe is forbidden on its portion between the peak of Sharing and the nose cut Sainte-Rose (since April 2018).

 

Source: Prefecture of Reunion

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