April 02 , 2020. EN. La Réunion : Piton de la Fournaise.
April 02 , 2020.
La Réunion , Piton de la Fournaise :
Activity bulletin for Thursday 02 April 2020 at 12.45 pm (local time)
Recommended alert level: 2-2
Following the seismic crisis this morning, between 8:15 am and 8:51 am local time, and after a lull of more than 3 hours, a volcanic tremor, synonymous with the arrival of magma near the surface, has been recorded since approximately 12:20 local time. According to OVPF records, the source of this tremor is located on the eastern flank, inside the Enclos .
No visual confirmation of the start of an eruption could be made at this time and we cannot confirm the arrival of the lava on the surface. However, the presence of a tremor shows the emission of hot and incandescent gases on the surface, and the possibility of lava emission.
Activity bulletin for Thursday, April 2, 2020 at 4:30 p.m. (local time)
Alert level: 2-2
The eruption which started on 04/02/2020 around 12h20 local time continues. The intensity of the volcanic tremor (indicator of the intensity of the eruption) after an increase phase at the start of the eruption has been relatively stable over the past two hours (Figure 1).
Figure 1: Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) since 02/04/2020 00h on the DSO seismological station located at the top of the volcano. (© OVPF / IPGP).
An overview of the SAG and the PGHM confirmed the opening of a crack on the eastern flank of the volcano about 1.7 km from the center of the Dolomieu crater at around 1900 m above sea level. This crack is located slightly below the eruption of February 10-16, 2020. During this flyby, the lava fountains did not seem to exceed 30m in height.
Figure 2: Shot of the eruptive site on 04/02/2020 around 3 p.m. (© SAG / PGHM).
Figure 3: Location map of the eruption tremor, on 04/02/2020 between 1:15 p.m. and 1:30 p.m. (local time) (© OVPF / IPGP).
The estimated surface flows, from satellite data via the HOTVOLC platform (OPGC – University of Auvergne) are greatly disturbed by the bad weather conditions observed around the Piton de la Fournaise. The rare measurements carried out, relate to flows of the order of 4 m3 / s but these are probably underestimated.
Source : OVPF.