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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

The eruption that started at Piton de La Fournaise on February 10, 2020 around 10:50 am local time continues. The intensity of the volcanic tremor (indicator of the intensity of the eruption) has gradually decreased since the opening of the eruptive fissures.

See previous article

Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) over the past 24 hours on the FLR seismological station located on the eastern flank of the volcano. (© OVPF / IPGP)

Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) over the past 24 hours on the FLR seismological station located on the eastern flank of the volcano. (© OVPF / IPGP)

During the seismic crisis that accompanied the final spread of magma to the surface, between 10:26 am and 10:50 am, 210 earthquakes were recorded under the summit zone of the volcano.

Following aerial reconnaissance in the early afternoon, the cracks could be located. Several cracks opened on the eastern flank of the terminal cone between the upper part of the terminal cone and 2000 m altitude (at the level of Marco crater).

Piton de La Fournaise - Approximate location (GPS position from helicopter) of the eruptive cracks opened on 02/10/2020 and the associated flow at 1:15 p.m. local time. (© OVPF / IPGP)

Piton de La Fournaise - Approximate location (GPS position from helicopter) of the eruptive cracks opened on 02/10/2020 and the associated flow at 1:15 p.m. local time. (© OVPF / IPGP)

Piton de La Fournaise - 10.02.2020 / 1:15 p.m. local - Aerial shot in thermal imaging of the eruptive site (© OVPF / IPGP)

Piton de La Fournaise - 10.02.2020 / 1:15 p.m. local - Aerial shot in thermal imaging of the eruptive site (© OVPF / IPGP)

All of these fissures extend over a distance of about 1 km.

During the overflight (1 p.m. to 1:30 p.m. local time), the lava fountains did not exceed 10 m in height. Due to the location of eruptive cracks and steep slopes in the area, the lava flows had reached 1,700 m above sea level at 1:15 p.m. local time and the flow front was less than 150 m from the break of the large slopes. However, the casting front was greatly slowed down by a flat area.

Piton de La Fournaise - Aerial shot of the eruptive site on 02/10/2020 around 1:15 p.m. local time - All of the cracks extend over a distance of approximately 1 km. - (© OVPF / IPGP)
Piton de La Fournaise - Aerial shot of the eruptive site on 02/10/2020 around 1:15 p.m. local time - All of the cracks extend over a distance of approximately 1 km. - (© OVPF / IPGP)

Piton de La Fournaise - Aerial shot of the eruptive site on 02/10/2020 around 1:15 p.m. local time - All of the cracks extend over a distance of approximately 1 km. - (© OVPF / IPGP)

Source: OVPF

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

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