Etna (Sicily, Italy): Volcanic Ash Advisory Center Toulouse (VAAC) issued the following report: ERUPTION AT 20230521/0615Z VA EMISSION HAS CEASED OBS VA DTG:21/1800Z
Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20230521/1753Z FL060 EXTD E OBS VA DTG:21/1750Z
Ibu (Halmahera, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA REPORTED TO FL080 MOV W AT 21/1240Z OBS VA DTG:21/1410Z
Krakatau (Sunda Strait, Indonesia): (21 May) Our VolcanoDiscovery Indonesia guide Galih visited the volcano during our expedition scheduled last week.
He reported that the recent eruptive period (11-13 May) ended and „only“ venting was visible from the recently formed cinder cone on 15 May. An estimated cone’s height is about 100 meters.
During the local observatory inspection in Pasaran village, seismic recordings detected several micro tremors related to the activity.
Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 30000 ft (9100 m) altitude or flight level 300 .
The full report is as follows: MAJOR VA EMS CONT to 30000 ft (9100 m)
Nevado del Ruiz (Colombia): (21 May) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: VONA RPRTS VA EM AT 2343Z. to 20000 ft (6100 m)
Sangay (Ecuador): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 19000 ft (5800 m) altitude or flight level 190 .
The full report is as follows: CONS EM to 19000 ft (5800 m)
Reventador (Ecuador): (20 May) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 .
The full report is as follows: VONA RPRTS VA EM. to 15000 ft (4600 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 .
The full report is as follows: continuous ash emissions to 22000 ft (6700 m)
Nyamuragira (DRCongo): The vigorous effusive eruption at the volcano remains active.
According to updated information from the local volcanologist Charles Balagizi, the lava continues to be active and advance over the western flank of the edifice within Virunga National Park. Whether the lava flow is erupting either from a flank vent or the summit, is unclear yet and this detail has to be confirmed by the volcano observatory.
The ongoing strong glowing steam is clearly distinguishable from Goma city and even at the time of this update still continues.
…21 May:
The elevated effusive activity within the volcano’s summit caldera continues.
A strong glowing steam, visible clearly from Goma city, may hint so-called drain-back of the lava lake – a stable condition where a delicate equilibrium between heat and magma supply and loss (through cooling and mild emissions during degassing) takes place.
The volcano’s north-central active lava lake area is well detectable from a satellite imagery, acquired by the Planet on 19 May as it’s being fed by a new batch of magma associated by strong degassing. From the satellite image, it seems that slabs of dark, solidified crust continue to shift on the lava lake surface, accompanied by typical bright orange lava glow between them.
Volcano Activity Summary for 21 May 2023:
