Activity of La Fournaise, Alaid, Sabancaya and Mauna Loa.

The eruption started at Piton de La Fournaise on 09/19/2022 around 07:48 local time continues. The amplitude of the eruptive tremor (indicator of surface lava emission) has remained generally stable over the past 24 hours, at around 20% of its initial amplitude

No volcano-tectonic earthquake has been recorded directly above the summit area over the past 24 hours. Over the last 72 hours, no significant deformation has been recorded.

The lava flow estimates established by satellite method on the HOTVOLC (OPGC - Clermont Auvergne University) and MIROVA (University of Turin) platforms indicate an average flow over the last 24 hours that is relatively stable and low, with a peak estimated at 8 m³/ s.

The images from the OVPF-IPGP webcam located at Piton de Bert showed this morning 09/26/2022:
- still significant degassing at the eruptive site and low-amplitude lava projections;
- a gas plume still directed towards the south-west quarter as also observed on satellite data in recent days;
- a lava flow activity still mainly through lava tunnels as observed yesterday by infrared imagery according to 2 main flow arms, oriented respectively east-south-east and south-east;
- several resurgences of lava visible at the level of the tunnels.

An overview performed this afternoon confirmed the following points:
- A closed cone has formed around the remaining active vent;
- The plume is pushed by the wind towards the southwest;
- The flow is divided into 2 arms spreading respectively towards the east-south-east and the south-east;
- The most active flow extends east-south-east towards the castle crater;
- The end of this flow located around 1850 m altitude and about 1 km south-east of the castle is no longer active;
- Visible active flows (resurgences) remain confined to the first km of flows from the vent.

 
Alert 2-1 (eruption in the Enclosure without any particular threat to the safety of people, property or the environment) remains in effect.

Source: OVPF-IPGP press release 26.09.2022 / 5 p.m. local

Find all the information relating to the activity of Piton de la Fournaise on the various OVPF-IPGP media: - the website: ipgp.fr/fr/ovpf/actualites-ovpf - the Twitter account: twitter. com/obsfournaise - the Facebook account: facebook.com/ObsVolcanoPitonFournaise

A moderate eruptive activity continues at Alaid Volcano in the northern Kuriles. An ash plume rose to 2,500-3,000 meters asl. and spread about 140 km east-southeast of the volcano.

The moderate eruptive activity of the volcano continues. Ash explosions up to 6 km (19,700 ft) above sea level could occur at any time. Current activity could affect low-flying aircraft. Aviation color code remains Orange.

Mirova reports moderate to high thermal anomalies on September 26 and 27, between VRP 123 and 801 MW

Sources: KVERT, Mirova and VAAC Tokyo

The Geophysical Institute of Peru reports that the eruptive activity of the Sabancaya volcano remains at moderate levels this week, that is to say with the recording of an average of 50 daily explosions, with columns of ash and gases up to 1.8 km altitude above the summit of the volcano and their consequent dispersion.

The IGP recorded and analyzed the occurrence of 323 earthquakes of volcanic origin, associated with the circulation of internal magmatic fluids and Volcano-Tectonic (VT) type earthquakes associated with rock fracturing.

Monitoring the deformation of the volcanic structure using GNSS techniques (processed with fast orbits) does not show any significant anomalies. However, in general, an inflation process was observed in the northern sector (surroundings of the Hualca Hualca volcano).

Satellite recordings have identified the presence of 10 thermal anomalies, with a maximum value of 18 MW, associated with the presence of a lava body on the surface of the crater of the volcano.

The volcanic alert level remains orange, with an inaccessible zone of 12 km radius.
 

Source : I.G.Peru

A small seismic swarm has been detected below the summit of Mauna Loa volcano. As of 2 a.m. HST on 2022-09-23, the U.S. Geological Survey's Hawaiian Volcano Observatory has recorded more than 38 earthquakes beneath the summit caldera region, the most earthquakes in a group about 3.1 mi (5 km) wide and -1.2 to 0.6 mi (-2 to 1 km) below the surface.

These earthquakes may result from changes in the magma storage system and/or may be part of normal readjustments of the volcano due to changing stresses within it. The HVO continues to monitor Hawaiian volcanoes for any changes.

According to HVO Scientist in Charge Ken Hon, "Seismic activity beneath Mauna Loa has been gradually increasing over the past two months. Small earthquake swarms are considered a normal part of this increase in activity. Currently, there is no indication that magma is moving towards the surface and other monitoring systems are showing normal behavior.Seismicity and deformation levels remain below those recorded during the winter of 2021. HVO will continue to monitor closely monitor this activity and report any significant changes."
 

Source : HVO