Volcanic activity worldwide 29 May 2023: Popocatépetl volcano, Merapi, Ibu, Reventador, Nyamuragira…

Map of today’s active volcanoes

Ibu (Halmahera, Indonesia): (29 May) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA REPORTED TO FL070 AT 29/0442Z OBS VA DTG:29/0500Z

Lewotolo (Lesser Sunda Islands): (28 May) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: VA REPORTED TO FL070 AT 28/2213Z OBS VA DTG:28/2220Z

Merapi (Central Java, Indonesia): The extrusive activity at the volcano continues.
The actively growing lava dome slowly grows and sheds numerous glowing avalanches that descend into the southwestern flank about a couple of km distance from the summit and lifted dust (so-called phoenix clouds) as can be seen in the attached video from this morning. It resulted from a partial collapse of the lava dome at the southwestern rim of the volcano’s summit crater.
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The public is being warned to stay at least 3 km away from the summit.

Popocatépetl (Central Mexico): The continuous strong eruptive episode (so-called paroxysm) dominates the volcano and is now in progress at the summit vent.
Pulsating lava fountains shot up to perhaps a hundred meters above the crater, accompanied by sustained vigorous ash-rich emissions in the night of 28 May.
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Intense powerful explosions continue to generate abundant grey ash plumes spewing to estimated 21,000 ft (6,400 m) elevation associated with glowing bomb ejecta. Soon after landings, the vast edifice area is being constantly illuminated by fragmented incandescent material.
Seismic records registered 1425 minutes of volcano-tectonic tremor over the past 24 hours.

…29 May:
The high activity dominates the volcano with near-frequent strong vulcanian-type explosions and periods of dense ash emissions from the summit area.
Intense powerful explosions continue to generate abundant grey ash plumes spewing to estimated 21,000 ft (6,400 m) elevation associated with glowing bomb ejecta. Soon after landings, the vast edifice area is being constantly illuminated by fragmented incandescent material.
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Strong bursting of large amounts of ash emissions continued most of the previous days.
Seismic records registered 1417 minutes of volcano-tectonic tremor and 8 ongoing emissions of water vapor, gas and ash over the past 24 hours.

San Miguel (El Salvador): (29 May) The explosive eruption at the volcano continues at roughly regular intervals.
Surveillance cameras of San Salvador’s Ministerio de Medio Ambiente observed ash eruptions from the summit crater. The heights of grey ash plumes are unknown as they weren’t reported by the VAAC nor the volcano observatory, but from the attached video from 27 May, they seem to rise several hundred meters above the vent.

#Chaparrastique Volcano #SanMiguel, El Salvador, 27.05.2023, 16:47 local time, 6x speed source: Ministerio de Medio Ambiente pic.twitter.com/myKoxYMkdH

— Rita Bauer (@wischweg) May 28, 2023

Sangay (Ecuador): The volcano showed a dramatic activity today.
A strong, dilute pyroclastic flow (gravity-driven mass flow) appeared to descend over the southeastern flank in early this morning. The reason for this torrent is not clear yet, but from previous observations at the volcano, it might come from continuous glowing rock falls on the southern slope and its sudden accumulation and destabilization culminating into pyroclastic density currents as happened today. Pyroclastic flows are deadly, turbulent hot avalanche of lava rock fragments of all sizes embedded in a mixture of turbulent gas and ash racing down slopes.
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Near-frequent vulcanian eruptions continue to produce ash columns releasing pyroclastic material to approx. 5,8 km-6,1 km (19,000 ft-20,000ft) in the western-northwestern direction.
Satellite-based measurements of SO2 concentrations were detected in plumes of about 759 tonnes on 1 March.

Reventador (Ecuador): 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: VONA RPRT RCVD to 14000 ft (4300 m)

Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: continuous ash emissions

Nyamuragira (DRCongo): According to the volcano institute Observatoire Volcanologique de Goma (OVG), the effusive activity returned to the pre-eruptive stage starting on 17 May.
However, the activity remains confined within the volcano’s summit caldera associated with the intermittent night-time glow and constant degassing at the top of the volcano. The central lava lake is currently at stable condition suggests that there is a delicate equilibrium between heat and magma supply and loss (through cooling and mild emissions during degassing).
Source: Observatoire Volcanologique de Goma volcano activity update 29 May 2023
…29 May:
The local observatory Observatoire Volcanologique de Goma (OVG) reported that the effusive eruption at the volcano started to wane on 21 May.
The drop in activity has been detected at Rumangabo monitoring station.
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The lava flow, spilling out onto the western flank and fed from the lava lake outlet channel, slowed down its pace and gently began solidifying, i.e. making a crust on the lava flow surface.

Volcano Activity Summary for 29 May 2023:

Satellite image of Ibu volcano on 29 May 2023