Activity of Sangay, Home Reef, Piton de La Fournaise, Vulcano, and seismic swarm on the Reykjanes ridge.

From 01:00 TL, September 27, 2022, thanks to satellite images (GOES-16), an ash cloud is observed which reaches about 2 km above the crater of the Sangay volcano, Ecuador, and headed towards the southwest.

Therefore, there is a possibility of ash fall in the province of Chimborazo. This phenomenon has persisted during the current eruptive period which began in May 2019.

The IG-EPN continues to monitor the event and will report in a timely manner if changes in seismic signals are detected.

In the past 24 hours, the Washington VAAC has issued 3 reports of ash emissions in a west and northwest direction with a maximum height of 2,400 meters above crater level.
Frequent small columns of ash were observed during the day.
The FIRMS system records 34 thermal alerts and MIROVA records 2 high thermal alerts (239 and 196 MW) in the last 24 hours.
This morning, thanks to the images shared by ECU-911, the volcano was clear, an emission of ash could be observed 800 meters above the summit in a southwesterly direction. At the moment, the volcano is cloudy.
Seismicity is significant, with 825 explosion earthquakes (EXP), 12 Long Period earthquakes (LP), and 22 emission earthquakes (TREMI)
The alert remains at the Amarilla level.

Source: IGEPN

In the Pacific, the geological service of the Tonga Islands reports for September 27, 2022 a total of 21 volcanic events at Home Reef, including an ash eruption at 12:36 p.m., imaged by the Himawari-8 satellite.

No new measurements from the new island since September 19: 211 m. x 218m. Surface: 8.6 acres / 34800 m², estimated height: 15 m. asl.

Notice for the navy: do not enter waters within a radius of 4 km. around Home Reef

Source: Tonga Geological Services

The amplitude of the eruptive tremor (indicator of surface lava emission) at Piton de La Fournaise 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.

A slight inflation (swelling) of the summit zone of the volcano seems to be emerging, this parameter will be confirmed in the coming days.

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 around 2 m3/s, with a maximum peak rated at 7 m3/s.

The observations of the OVPF-IPGP teams in the field show for today an activity similar to the previous days.

Alert level: Alert 2-1 (Access to the Enclosure prohibited; eruption in the Enclosure without any particular threat to the safety of persons, property or the environment)

Source: OVPF-IPGP

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

At Vulcano, in the Aeolian Islands, temperatures remain stable at high values ​​along the upper edge of the crater.
The CO₂ flux in the crater area remains stable at medium-high values.
The SO₂ flux in the crater area is stable at a moderately medium-high level
Geochemistry of fumarolic gases: The concentration of magmatic species (CO₂, He, N₂) is slightly decreasing (11 mol% CO₂ on 09/14/2022).
The CO₂ flux at the base of the La Fossa cone and in the Vulcano Porto area: stable CO₂ flux values ​​above the background noise in the Rimessa site; stable but still abnormal values ​​on the Camping Sicilia site; slightly decreasing values ​​at the Palizzi site (P4max); in the Faraglione site the values ​​recorded are stable and close to the baseline values
Monthly CO₂ Flux Campaign: C emissions in the Vulcano Porto area show no significant change from the previous month and still remain at levels above background.

The INGV reports a stabilization of the supply of fluids of fumarolic origin to the thermal aquifer is generally observed, but still remains at abnormal levels in certain sites.

The other parameters do not show significant variations.

Source: INGV OE – full text https://buff.ly/3LPH6Zo

A seismic swarm takes place south of the Reykjanes Ridge, in the Atlantic at the level of the Charlie-Gibbs transform fault, and reveals a possible magmatic intrusion.

Source: USGS Earthquake Hazards