Seismic activity is still recorded under the Piton de la Fournaise (summit area and east flank) even if it continues to decrease.
For the day of 10/03/2020, 25 volcano-tectonic earthquakes deep under the eastern flank, 4 earthquakes classified as "undetermined" (because of low magnitudes) and 24 shallow landslides / collapses in the eastern flank sector were pointed out. manually. No superficial summit volcano-tectonic earthquake has been recorded.
During the day of 10/03/2020, no significant deformation occurred in the Grandes Pentes sector. On the other hand, the inflation (swelling) of the summit zone continues, testifying to the pressurization of a source under the summit, where the superficial supply system is located (magmatic reservoir from which the magma intrusions depart towards the top. area). This resumption of inflation is consistent with the increase in CO2 concentrations in the soil, which are increasing in the far field (Plaine des Cafres sector). This increase is often associated with a rise of magma from the mantle.
The persistence of even lower seismicity shows that the intrusion of magma towards the eastern flank is still active and that an eruption cannot be excluded. The inflation of the summit area and the increase in CO2 concentrations show that a new intrusion cannot be excluded. The observatory teams remain mobilized.
The volcano remains on alert 1.
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/)
This Saturday, October 3, 2020, the Reventador volcano emitted ash, steam and gas, heading west and north with heights of up to 600 meters above the crater level.
In the IG-EPN report, in the section on seismic events, it is also detailed that from 11:00 a.m. on October 2 to 11:00 a.m. on Saturday 3, 33 explosions were recorded.
Incandescence was observed in the crater, as was the rolling of incandescent blocks on the eastern flank, up to 600 meters below the level of the crater. IG-EPN adds that the lava flow is observed on the northeast flank.
The Reventador volcano is located between the provinces of Napo and Sucumbíos, located about 90 kilometers east of Quito, with permanent volcanic activity so the orange alert is maintained.
At 4:55 p.m. local time on October 3, 2020, an earthquake related to the movement of fluids (long period) was recorded at Nevados de Chillan, at a depth of 0.6 km with a reduced displacement of 526 cm * cm.
Due to weather conditions, it was not possible to verify the surface activity at the active crater.
These types of earthquakes have been recurrent in the current Nevados de Chillán cycle and generally have been associated with crater level explosions.