LAVE The European Volcanological Association 7 rue de la Guadeloupe 75018 PARIS – France Tl : +33 (0) 7 81 63 01 09 Fax : +33 (0) 5 55 00 10 19
Expo-LAVE LAVE has produced an educational exhibition made up of panels and photos and completed with a collection of rocks and minerals that it makes available to its regional delegations or rents out to municipalities, works councils or other institutions, for events. cultural « general public »
LAVE webcam LAVE has its own webcam on Etna. Click here to get there.
Pagan (the Marianas / Pagan)
Following an increase in seismicity, the color of the aerial warning for the Pagan (the Northern Mariana Islands) has changed to yellow. There are no ground-based instruments on Pagan Island, but locals have reported increased seismicity and slight missions over the volcano. The last major rupture of the Pagan (VEI 4) dates back to 1981. Another rupture occurred in 2012, with a VEI 2.
……. Source : USGS
Semisopochnoi (US / Alaska, Aloutians)
In a report released on July 31, 2021, AVO said seismic activity on Semisopochnoi has increased over the past few days with a more marked increase in the previous 8 hours. An increase in activity was also detected at infrasound stations in the region, suggesting that weak ash emissions may have taken place. Due to this increase in activity, AVO changed the color of the aerial alert ORANGE and the volcanic alert level WATCH (Vigilance).
Etna (Italy / Sicily)
Etna experienced a new ruptured crisis in the evening of July 31, 2021. It began with Strombolian activity inside the Southeast Crater. The ruptive plume rose to an altitude of 5 km. We then observed the usual lava flow towards the southwest. The climax culminated in an episode of lava fountains. The show ended around midnight.
Montagne Pele (France / Volcanic Arc of the Lesser Antilles, Martinique)
The weekly monitoring of the activities of the Pele Mountain reveals at least 77 earthquakes between July 23 and 30, 2021. The events are of the volcano-tectonic type, with a magnitude less than or equal to M 0.5. The OVSM indicates that they were located inside the volcanic edifice between 2.4 km below sea level and the surface. No earthquake was felt by the population. This superficial seismicity is associated with the formation of micro-fractures in the volcanic edifice.
In addition, a gas-free zone was detected in the shallow sea between Saint-Pierre and Le Prcheur. Scientists are currently carrying out a series of experiments to find out the origin of this degassing in order to assess its possible relationship with the hydrothermal system of Montagne Pele, the alert level of which remains yellow.
……. Source : OVSM
Stromboli (Italy / the Aeolians)
At around 10 p.m. on August 1, 2021, a strong explosion occurred in the Center-South area of the Stromboli crater terrace. The expelled materials reached 150 m and sprayed the summit up to Pizzo. The prohibition of access to the latter is therefore justified. The situation returned to normal thereafter.
……. Source: INGV
Mayotte (France / Comoros Archipelago)
A strong long-period seismic activity (LP) comprising 186 events was recorded at the submarine volcano of Mayotte. The swarm began 4:33 p.m. UTC on July 31, 2021.
Some LP earthquakes were located about 1 km east of Petite Terre and about 1 km deep, in the area where LP earthquakes usually occur. A new swarm started at 13:00 UTC on 1 August 2021. An earthquake of M 4.1, weakly felt by the population, was recorded 01:36 UTC on 3 August about 35 km east of Dzaoudzi at a depth of 39 km. REVOSIMA recorded 648 earthquakes during the month of July: 374 were volcano-tectonic (VT), 265 long period (LP) and 9 very long period (VLP). Seismic activity was mainly concentrated 5-15 km east of Petite Terre and depths of 20-50 km. As of July 1, 2018, Mayotte’s GPS stations indicate an overall displacement of 21-25 cm eastward and subsidence of about 10 cm, depending on the location of the stations on the island. Since the end of 2020, the deformations have become negligible.