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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, #"Parole aux lecteurs"

Photos taken tonight by our friend Thierry Sluys reveal all the power and magic of this eruption.

Seen from several places in the south-east of the island, it ignites the sky above the great slopes and the Great Brûlé.

A click on the photos to appreciate them in full screen.

 Piton de la Fournaise - 08.03.2019 - the eruption seen from "la route des radiers" - photo © Thierry Sluys

 Piton de la Fournaise - 08.03.2019 - the eruption seen from "la route des radiers" - photo © Thierry Sluys

 Piton de la Fournaise - 08.03.2019 - the eruption seen from the "route des laves" - photo © Thierry Sluys

 Piton de la Fournaise - 08.03.2019 - the eruption seen from the "route des laves" - photo © Thierry Sluys

Piton de La Fournaise - 08.03.2019 - the eruption seen from Bois Blanc, with a beautiful pyrocumulus generated by the eruption - photo © Thierry Sluys

Piton de La Fournaise - 08.03.2019 - the eruption seen from Bois Blanc, with a beautiful pyrocumulus generated by the eruption - photo © Thierry Sluys

Piton de la Fournaise - 08.03.2019 - the eruption seen from the Anse des Cascades - photo © Thierry Sluys

Piton de la Fournaise - 08.03.2019 - the eruption seen from the Anse des Cascades - photo © Thierry Sluys

After the aesthetics of the eruption and the photos of Thierry, the technique, with the latest newsletter of the OVPF:

The intensity of the eruptive tremor continues the rise started 48 hours ago.

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 09:48 (05:48 UTC) on February 18 and March 8 at 15:30 (11:30 UTC) on the seismic station of FLR. (© OVPF / IPGP)

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 09:48 (05:48 UTC) on February 18 and March 8 at 15:30 (11:30 UTC) on the seismic station of FLR. (© OVPF / IPGP)

Over the last 36 hours, 49 superficial superficial volcano-tectonic earthquakes (above sea level) have been recorded. The strongest recorded is of magnitude 1.49.

The CO2 concentrations in the near field soil (volcano deposit area) remain high.

Over the last 36 hours, the surface flows estimated from the satellite data, via the HOTVOLC platform (OPGC - University of Auvergne), fluctuated between <1 and 50 m3 / s (these measurements can be affected / reduced by cloud cover). It should be noted that most of the measurements remain however less than 30 m3 / s and that following the cloud cover these measures are no longer possible since 9:30 this morning.
 

An intervention led by SAG and PGHM allowed a team of the volcanological observatory to go to the scene of the eruption today in order to locate the cracks that opened during the last days. perform lava sampling, make a survey of the extension of the flows.

Piton de La Fournaise - Infra-red view of the eruptive site and the high parts of the flows from the north of the eruptive site. (© OVPF / IPGP 08.03.2019)

Piton de La Fournaise - Infra-red view of the eruptive site and the high parts of the flows from the north of the eruptive site. (© OVPF / IPGP 08.03.2019)

This mission made it possible to establish that the fissure which opened on March 5th on the north-west flank of the Madoré peak (upstream of the active mouth since March 19th) remains active. A small cone of projections high of a dozen meters has been built and two low flow flows remain active west side (extension of a few tens of meters) and north side. The main flow is that which flows north side and progresses east (direction of the slope).

The fissure that opened yesterday morning, March 7, is located 300 m south of the active vent since March 19 and is oriented in a west-easterly direction. It was very active this morning with 2 fountains of lava of about fifty meters high.

The lava samples taken show that the eruptive vents of March 5 and March 7 produce lava of different compositions.

Cloud cover did not locate the end of the flows. However, a simple geometric computation done on the images acquired last night by our webcam, makes it possible to estimate that the front of casting was last night slightly above 1000 m of altitude, about 3 km of the lava road.

Piton de La Fournaise - Recent structure and flows - photo 08.03.2019 (© OVPF / IPGP)

Piton de La Fournaise - Recent structure and flows - photo 08.03.2019 (© OVPF / IPGP)

Sources:

- Thanks to Thierry Sluys for sharing beautiful recent pictures.

- OVPF - Daily Bulletin

Find all the information related to the Piton de la Fournaise activity on the different media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=en),
- and the facebook account (https://www.facebook.com/ObsVol

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