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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

At the Piton de La Fournaise, observations from the RN2 by an OVPF team, on February 20th, showed that the flows continued their progression in a discontinuous way (with periods of stagnation - stagnation of the casting front - and periods of faster progression) and that the main pouring front had crossed the "broken of the Great Slopes".

A point was made this February 22 around 7:30 on the advance of the lava flow, following a microlight overflight by a team of the OVPF. Over the last 24 hours, the casting front has hardly changed and is still located in the upper sector of the Grandes Pentes. On the other hand, the flow widens with two visible arms this morning, one to the north and the other to the south of the Guyanin piton.

Over the last 36 hours, surface flows estimated from satellite data, via the HOTVOLC platform (OPGC - University of Auvergne), were between 2 and 8 m3 / s.

Piton de La Fournaise - 22.02.2019 / 7.30am - The casting is divided into two arms (in medium gray on the black marks of the January fire) - photo OVPF

Piton de La Fournaise - 22.02.2019 / 7.30am - The casting is divided into two arms (in medium gray on the black marks of the January fire) - photo OVPF

Piton de La Fournaise - 22.02.2019 / 7.30am - the slag cone on the active crack and the casting - photo OVPF

Piton de La Fournaise - 22.02.2019 / 7.30am - the slag cone on the active crack and the casting - photo OVPF

Piton de La Fournaise - 22.02.2019 / 7.30am - the lava flow is expanding - photo OVPF

Piton de La Fournaise - 22.02.2019 / 7.30am - the lava flow is expanding - photo OVPF

The eruptive tremor (indicator of the intensity of the eruption) is relatively stable since February 20 at 06h local time.

Over the past 36 hours, 7 superficial superficial volcano-tectonic earthquakes (above sea level) have been recorded

After a deflation of the edifice related to magma transfer that has occurred since 18/02/2019, the deformations of the summit zone do not show any particular signals.

Far-field CO2 concentrations in the Plaine des Cafres region are in sharp decline and those recorded in the near field remain high, again in agreement with the magma transfer that has occurred since 18/02. / 2019.

Piton de La Fournaise - Contours of the eruptive phase flows of 18 and 19/02/2019 determined from satellite data by the OI2 platform (Clermont Auvergne University).

Piton de La Fournaise - Contours of the eruptive phase flows of 18 and 19/02/2019 determined from satellite data by the OI2 platform (Clermont Auvergne University).

Piton de La Fournaise - image Sentinel-2 image bands 12,11,4 of 21.02.2019 - one click to enlarge

Piton de La Fournaise - image Sentinel-2 image bands 12,11,4 of 21.02.2019 - one click to enlarge

On the sidelines of the current eruption, an OVPF team is testing OVPF instruments (inter-calibration) in the fumarole fields of the Caldeira das Furnas in the Azores as part of the European Eurovolc program (collaboration of various European institutes) . Upon the return of our team, these instruments will be tested at Piton de la Fournaise.

Source: OVPF

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/ObsVolcanoPitonFournaise/)

OVPF team tests OVPF instruments (inter-calibration) in the fumarole fields of the Caldeira das Furnas in the Azores

OVPF team tests OVPF instruments (inter-calibration) in the fumarole fields of the Caldeira das Furnas in the Azores

In Costa Rica, Ovsicori reported on 21 February an eruption in Turrialba (unspecified other than the time of report at 11am). It was accompanied by a plume 300 meters above the crater.

During the day, frequent ash emissions continued, obscuring the view of the crater.

Source: Ovsicori

Turrialba - only clear view of the day of February 21 / 7:17 am on a crater covered by ashes - webcam Ovsicori

Turrialba - only clear view of the day of February 21 / 7:17 am on a crater covered by ashes - webcam Ovsicori

Nearly seven months after the end of the eruption of Kilauea without any sign of reactivation, an overview by Mick Kalber and Bruce Omori, with Paradise helicopters, allows us to get an idea of ​​the situation.

A month ago, a new road was made between the "Y" of Highway 132 and the new lava channel to the PGV geothermal plant. Today, some homeowners and tenants in and near the flow field have begun bulldozing their own access roads.

The vents along the line of cracks in and around Leilani Estates still emit steam, but emissions are still lower than the beginning of the eruption in 1983.

Pele has created dozens of black sand beaches along six kilometers of coastline between Kapoho Bay and Mackenzie Beach Park. The areas around lava flows continue to green pleasantly, with the exception of foliage completely burned or destroyed by volcanic gases.

Source: Mick Kalber

To watch in big screen - sorry for a deficient display of the video on the blog.

For those who enjoyed the images of these photographers, have a good time with them and the Hot Seat Hawai'i team on the Big Island as they discuss the 2018 Leilani Estates eruption and the production of their documentary (currently in post-production). Mick Kalber (HSHI co-producer and volcanologist), Bruce Omori (lava photographer and HSHI partner), Tim Coakley (co-producer of HSHI) and Jason Chan (Lava Junkie) tell the story and share three-month sequences shooting of the eruption. in 2018.

https://www.youtube.com/watch?v=7-a5JG5OT3g&feature=share

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