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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 : #Actualités volcaniques
Piton de La Fournaise - the three breached cones on the active crack - photo Ilotdrones

Piton de La Fournaise - the three breached cones on the active crack - photo Ilotdrones

At Piton de La Fournaise, the eruption started on April 27, 2018 at 11:50 pm local time continues.

After a drop in intensity during the first 14 hours of the eruption, the intensity of the volcanic tremor (indicator of eruptive intensity at the surface) has remained relatively stable in the last 24 hours. Only a few small amplitude fluctuations have been observed, and are related to morphological changes at the eruptive site (volcanic cone building).

Piton de La Fournaise - thermal anomalies since the beginning of the eruption - doc. Mirova Modis 29.04.2018 / 21:30
Piton de La Fournaise - thermal anomalies since the beginning of the eruption - doc. Mirova Modis 29.04.2018 / 21:30

Piton de La Fournaise - thermal anomalies since the beginning of the eruption - doc. Mirova Modis 29.04.2018 / 21:30

The lava flow in gratons reaches the base of the rampart

This morning, three eruptive mouths are still active, and erect cones erected towards the southwest, where the lava flows. The front of the pouring has reached the base of the rampart, without however causing a fire of the wall as in October 2015. Firefighters are however on hand to control the situation.

Update OVPF 30.04.2018 / 16h local

The northernmost vent has reduced activity. The two fountains that escape do not seem to exceed fifteen meters in aerial view.

The southernmost vent is a cone that does not exceed five meters high. The aerial view makes it clear that this cone is almost completely closed. Through the small hole located at the top of the lava is still visible inside. It is through this same orifice that escapes fumaroles sulfur (common point to the three vents).

Between these two vents a third located in the center is much more active. Formed all in length (3 times its height is about 30 to 40 m long), it is occupied by a lake where large bubbles of lava are visible giving fountains when they explode.

During the overflight (10h20 in local time) only this last cone let escape lava flows. Despite the thick plume, three active lava arms were observed. At 10:20 local the two drove more east had not traveled more than 150 m while the one further to the west bypassed the east Cassian Crater and had traveled about 1.2 km.

The aerial observation confirms the elements gathered yesterday according to which the casting had then reached during the day 2.6 km of which 400 m along the southern rampart of Enclos. Observations made on this part of the flow seem to show that it has cooled (at least on the surface). No liquid effusion is visible in his forehead and no smoke is visible in the rampart

The surface flows estimated from satellite data, via the HOTVOLC platform (OPGC - Clermont Ferrand) and MIROVA (University of Turin), recorded today were 4.3 ± 1.5 m3 / s.

No significant deformation was recorded during the day on the terminal cone.

Two peak volcano-tectonic earthquakes have been recorded in the past 24 hours under the Piton de la Fournaise

Sources : OVPF and local media

Piton de La Fournaise - Shooting of the eruptive site on 30.04.2018 at 10:20. (© OVPF / IPGP)

Piton de La Fournaise - Shooting of the eruptive site on 30.04.2018 at 10:20. (© OVPF / IPGP)

Piton de La Fournaise - Shot of the rampart of the lava flow at the foot of the ramparts of the Enclos Fouqué on 30.04.2018 at 10:20 am. (© OVPF / IPGP)

Piton de La Fournaise - Shot of the rampart of the lava flow at the foot of the ramparts of the Enclos Fouqué on 30.04.2018 at 10:20 am. (© OVPF / IPGP)

A short update of the Vanuatu observatory informs a small eruption at Ambae this 27 April at 17h, still in progress around 20h.

No photo of the episode.

Source: VMGD

Ambae - photo Brad Scott during an overview on 21.04.2018

Ambae - photo Brad Scott during an overview on 21.04.2018

Sufficiently rare to be reported in our period of biodiversity decline, the installation of a small wasp in the ashes of the Masaya volcano.

The ability of some species to adapt to this hostile environment had already been noticed with small green parrots (Aratinga strenua) and bats, nesting in the walls of the crater.

Source: Noche de volcanes / twitter.

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