On 2 July IG presented additional results from the Sangay overflight that was conducted on 24 June with the purpose of performing maintenance on a gas and seismic station, taking visual and infrared photos of the surficial activity, and measuring volcanic gases.
Three thermal anomalies were identified: the first was in the summit crater and associated with explosions, the second was near the SE rim of the summit crater and possibly highlighted a small lava flow, and the third corresponded to the accumulation of hot deposits of pyroclastic flows at the lower part of the SE drainage.
Ash from summit explosions and pyroclastic flows that descended the SE flank dispersed mainly S and W.
Notable morphological changes to the summit areas were evident when comparing photographs from 17 May 2019 to 24 June 2020.
The maximum width of the SE flank drainage was an estimated 397 m.
Due to a large amount of airborne ash in the N, E, and S parts of the volcano, the SAGA station on the SW flank could not be reached and repaired.
Winds caused ashfall in populated areas.
Gas emission data could also not be obtained due to the amount of airborne ash.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG)
Bulusan (Philippines)
