At Sinabung, the plume of the main crater is white, and about 50 to 300 meters above the summit. Avalanches were observed on October 14 and 15, with a sliding distance of 100 to 150 meters east on 14, and 1,000 meters east-southeast on October 15.
In terms of seismicity, the PVMBG provides information for October 14, 2020:
- 18 earthquakes of collapse,
- 8 blast earthquakes,
- 2 low frequency earthquakes.
For this October 15, from 00h to 12h, the observatory recorded
8 collapse earthquakes, and 2 blast earthquakes
In Fuego / Guatemala, Insivumeh reports, in its activity report for September, a total of 2,306 explosions.
In mid-October, 1,037 explosions were recorded, including 5 strong explosions over the last 18 hours, accompanied by white-gray plumes of 1,000 meters above the crater. On October 14 at 10 a.m., an illustrated explosion, qualified as moderate, generated an avalanche in the barranca Ceniza.
As all the drainages can be affected by avalanches in their upper part, caution is recommended.
The Geophysical Institute of Peru (IGP) reports that the eruptive activity of the Sabancaya volcano, for the period from October 5 to 11, continues at moderate levels, with explosions at an average rate of 34 per day, accompanied by columns of ash and gas up to 3.9 km high at the top of the volcano.
The IGP recorded and analyzed the occurrence of 2027 earthquakes of volcanic origin associated with the circulation of magnetic fluids in the Sabancaya.
During this period, Volcano-Tectonic (VT) earthquakes were localized mainly to the northeast and northwest of Sabancaya.
The monitoring of the deformation of the volcanic structure, using GNSS techniques (processed with fast orbits), does not present any significant anomalies; however, a slight deflation of the SE flank of the Sabancaya has been observed since October 3. Satellite monitoring has identified the presence of 4 thermal anomalies with values between 5 MW and 24 MW, associated with the presence of a lava body on the surface of the volcano's crater.
Tropomi reports strong plumes of sulfur dioxide on October 6, with 12.78 DU of SO2, and on October 14, 11.10 DU of SO2.
The volcanic alert level remains orange, with a prohibited zone of 12 km in radius.
Sources: IGP & Tropomi