At Dukono, in the Molluques, the explosive activity continues, with this May 21, 2020 in plume reported by the VAAC Darwin at an altitude of 1,800 meters (flight alt. 060)
The PVMBG reports a thick white-gray plume 200-600 meters from the summit, and an episode of continuous tremor with an amplitude of 0.5 to 8mm, dominant at 2mm.
Sources: PVMBG, Magma Indonesia, VAAC Darwin
At Merapi, the week of May 15 to 21, 2020 was calm.
The BPPTKG reports a stable condition for the dome. The alert level remains at 2 / waspada; the seismicity remains low, with a superstructure on 20.05.
Potential dangers are currently in the form of pyroclastic flows in connection with the collapse of the lava dome, as well as possible explosive eruptions.
In Costa Rica, the Ovsicori recorded a small ash eruption with Rincon de La Vieja, with less water vapor content than in the previous weeks, on May 21, 2020 at 5:37 am, accompanied by a plume to 1,000 meters above the crater. The activity lasted one minute.
Seismicity is characterized by semi-continuous tremor.
In Vanuatu, the Yasur volcano on level 2 volcanic alert / disturbances at a major level - with a danger zone of 600 meters around the cone, presents small emissions of gas and / or ash.
The VAAC Wellinton reports an ash emission on May 19, 2020, with a plume at 2,100 meters above sea level, drifting to the southeast.
The thermal anomalies vary between low (4-5 MW) and high (112 MW) between May 17 and 20, 2020.
Sources: Vanuatu Geohazards Observatory & VAAC Wellington