Ebeko (Paramushir Island): (21 Aug) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20230821/2152Z FL150 EXTD SE REPORTED OBS VA DTG:21/2200Z
Suwanose-jima (Ryukyu Islands): (22 Aug) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20230822/0737Z FL070 EXTD W OBS VA DTG:22/0740Z
Mayon (Luzon Island, Philippines): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20230822/1247Z VA CLD UNKNOWN REPORTED OBS VA DTG:22/1250Z
Karangetang (Siau Island, Sangihe Islands, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 18000 ft (5500 m) altitude or flight level 180 .
The full report is as follows: VA TO FL180 OBS MOV NW AT 22/1400Z OBS VA DTG:22/1400Z to 18000 ft (5500 m)
Dempo (Sumatra): A explosion occurred yesterday morning inside the summit crater of the volcano. At 9.05 a.m. local time, dense jets of light to dark-gray ash and rocks, mixed with white steam, were ejected in a sudden, violent blast from the crater. The ash plume, also seen from people near the base of the volcano, rose a few hundred meters and quickly dissipated after the end of the eruption.
Climbers who were on the crater rim at the time filmed the event and could escape unharmed:
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lekas sembuh dempo pic.twitter.com/M3J2G2S3Fm
— Dio Dio agustianda (@AgustiandaDio) August 21, 2023
According to information from the Indonesian volcanological survey BVMBG, the eruption was likely phreatic in origin, i.e. entirely driven by steam explosion without ejecting fresh magma, which fits the visual style of the eruption, typical for such dangerous, and usually unpredictable explosions. The corresponding seismic signal had a maximum amplitude of 35 mm and lasted for 182 seconds.
Nevado del Ruiz (Colombia): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VONA RPRT OF VA MOV NW
Reventador (Ecuador): (21 Aug) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 .
The full report is as follows: NEW VA EMS. to 14000 ft (4300 m)
Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 22000 ft (6700 m) altitude or flight level 220 and is moving at 10 kts in NE direction.
The full report is as follows: continuous ash emissions to 22000 ft (6700 m)
Ubinas (Peru): On August 21, there were two explosive eruptions at Ubinas, each triggered a volcanic alert and produced eruptive columns of ash and gas over 3,500 m above the volcano summit. The eruptions occurred at 1:41 and 9.18 local time.
Ash has dispersed to the north, northeast, west and northwest with a radius of up to 50 km.
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