Two brief explosive eruptions marked the Zheltovsky and Khangar volcanoes respectively in the south and center of the Kamchatka peninsula on April 19, 2018.
A very strong explosive eruption began at Zheltovsky on 19.04.2018 at 21:45 UTC; the satellites spotted an ash plume up to 13.8 km before drifting southeast over 50 km. The aviation code went from green to red at 22:30 UTC ... to be lowered to 23 h the same day to orange.
The explosive activity is over according to the KVERT, and the ashes are no longer issued, despite a thermal anomaly observed by the satellites.
The aviation code returned to normal / green on April 20 at 3:15 UTC. Only moderate degassing remains.
This volcano is located in the southern volcanic field of Kamchatka, about 16 km NE of Kurilskoye Lake. The Zheltovsky forms a twin stratovolcano with a summa and an extrusive dome at the top.
The explosive eruption that marked the Khangar volcano began on April 19 at 22:15 UTC, accompanied by a plume of ash rising to 7.6 km asl., Before drifting to the NW over 30 km. It was followed by ash emission.
The aviation code went from green to red at 22:31 UTC, to be lowered to orange at 23:00 UTC, and finally to green 20,04,2018 at 1:59 UTC.
The Khangar is a stratovolcano carrying a summit crater lake, located south of the Sredinny Ridge.
An alert concerning the falls of ashes was decreed for all the day of April 20th for Sabancaya by the IG Peru. The ashes emitted are heading towards a western sector for more than 30 km and affect the populations of Huambo and Cabanaconde.
The height of the plumes of gas and ash has exceeded 2,500 meters above the crater.
Sources: IG Peru, Noticias Piura3.0, and Agencia Andina
After the activity of 19 and 20 April, and the definition of the alert level 3, Mt. Ywo-yama still shows a significant activity.
The flow of mud and hot water noticed on April 20 during the day, are now doubled by a second pouring arm.
Emissions at the bottom of the plateau have also intensified.
Sources: Hatakawa Yukio & F.IKGM / Twitter