The ongoing activity on Nishinoshima continues, more intense in June than in May.
Thermal anomalies are reported by Mirova and Himawari-8, described as high to very high from June 21 to 23.
On June 16, an ash cloud was observed heading east.
On June 21 and 22, a plume of sulfur dioxide was spotted by Sentinel - 5P / Tropomi, associated with the effusive rash. It extended in the troposphere over 5,000 km on June 22 (communication from Simon Carn)
The effusive activity modifies the morphology of the island, as indicated by the SAR images put online by GSI.
Sources: Japan Coast guards, GSI, VAAC Tokyo, S. Carn and Weather News.
海上保安庁 海洋情報部 海域火山データベース https://www1.kaiho.mlit.go.jp/GIJUTSU... 2020/6/19 海上保安庁撮影動画
Nishinoshima SAR interference 05.06.2020 / 19.06.2020 - The blue area with weak coherence seems to indicate a deposit of lava. - Doc. GSI
Nishinoshima - morphological changes between May 22 and June 5 (The light blue line surrounds the area where topographic changes took place between May 22, 2020 and June 5, 2020, and the red line surrounds the topographic changes observed subsequently - Doc. GSI
Nishinoshima - SO2 plume on these Sentinel-5P / Tropomi images of 21 and 22.06.2020 - Doc. Tropomi / via Simon Carn
Between June 15 and June 21, the eruptive activity of the Sabancaya volcano, in Peru, remained at moderate levels, with the continuous recording of explosions, on average 8 per day, with columns reaching 2.7 km from high on the top of the volcano and the consequent emission of ash and gas.
The IGP recorded and analyzed the occurrence of approximately 216 earthquakes of volcanic origin, associated with the circulation of fluids (magma, gas, etc.) within the Sabancaya volcano.
The monitoring of the deformation of the volcanic structure, using GNSS data (processed with fast orbits), does not present any significant anomalies; however, slight inflation was recorded in the north and southeast sectors of the volcano.
Satellite surveillance identified the presence of 9 thermal anomalies with values between 1MW-18MW, associated with the presence of a lava dome in the crater of the volcano being destroyed due to explosive activity.
The level of volcanic alert remains at Naranja, with a prohibited area of 12 km radius around the crater.
Also in Peru, the IGP reports a slight increase in seismic activity in Ubinas, for the period from 15 to 21 June, with 61 earthquakes of magnitudes below M1.7, which are associated with processes of rupture of the rocks inside the volcano. Similarly, 7 seismic signals were recorded associated with the movement of volcanic fluids (water vapor and gas).
Slight plumes of gas and water vapor have been observed reaching heights up to 1000 m above the summit of the volcano, scattered towards the northeast and southeast sectors of the volcano. The monitoring of the deformation of the volcanic structure and the satellite monitoring systems (SENTINEL, OMINASA (SO2 gas) and MIROVA (thermal anomalies) recorded no anomalies during the analysis period.
The alert level remains at Naranja, with a prohibited area 3 km in radius.
Source: I.G. Peru
INSIVUMEH has recorded an increase in seismic activity since June 20 at Pacaya. This increase in seismicity is linked to two lava flows which extend in a south-west direction at a distance of 650 meters and another in a north-west direction of about 200 meters, both from foci eruptives 100 meters from the Mackenney crater.
Simultaneously, Strombolian type explosions are recorded which launch incandescent materials at a height of up to 200 meters which form a column of ash 100 meters high, these explosions are heard at a distance of up to 5 kilometers.
Source: Insivumeh special bulletin
Pacaya - 23.06.2020 - effusive activity (lava flow and degassing) of the volcano - photo William Chigna Twitter
Pacaya - lava flow to the southwest - image Sentinel-2 bands 12,11,5 dated 23.06.2020 - Doc. Insivumeh
Pacaya - The RSAM / Real-Time Seismic Amplitude Measurement has gradually increased due to the extrusion of the material in eruptive homes, this increase is marked since June 20.
Some news from Sinabung, which remains in activity level 3 / siaga, with this June 22, a slight white plume about 50-300 meters from the summit.
The PVMBG reports a 2 mm amplitude earthquake, lasting 9 sec.
It is advisable not to be active within a radius of 3 km, extended to 4 km for the NE sector, and 5 km for the SE sector.
Sources: PVMBG, Magma Indonesia, and Nachelle Homestay.