Etna (Sicily, Italy): A swarm of small earthquakes has been occurring under the volcano since yesterday: about 50 tiny quakes with magnitudes between 1.0 and 2.2 were detected over the past 24 hours in an area on the lower eastern flank, roughly between the towns of Milo, Mascali and Giarre.
The depths of the quakes are mostly between 10-20 km in the lower crust where they might – or might not – indicate small events related to magma storage at lower reservoirs. It seems unlikely this will directly affect or translate into changes of the surface activity of the volcano in any near future. This is, at least, as long as the earthquakes are small as they are and don’t approach shallower levels.
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Sakurajima (Kyushu, Japan): (30 Apr) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 8000 ft (2400 m) altitude or flight level 080 .
The full report is as follows: VA CONTINUOUSLY OBS IN SATELLITE IMAGERY OBS VA DTG:30/0220Z to 8000 ft (2400 m)
Suwanose-jima (Ryukyu Islands): (29 Apr) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 6000 ft (1800 m) altitude or flight level 060 .
The full report is as follows: ERUPTED AT 20210429/2125Z FL060 EXTD E OBS VA DTG:29/2220Z to 6000 ft (1800 m)
Sinabung (Sumatra, Indonesia): (30 Apr) Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: GROUND REPORT OF ERUPTION WITH VA TO FL100 OBS VA DTG:30/0000Z
Dieng (Central Java): (30 Apr) The Pusat Vulkanologi dan Mitigasi Bencana Geologi volcano observatory (PVMBG) recorded a short-lived phreatic eruption at 18:25 local time yesterday.
A pyroclastic material in the form of country rock and mud was ejected to an approximate height of 400 meters into various directions as visible in the attached video below.
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Popocatépetl (Central Mexico): 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: NEW VA EM to 19000 ft (5800 m)
Pacaya (Guatemala): Following a period of relative calm since the recent lava flows had stopped on or around 16 April, a new lava flow started again earlier today. A new eruptive fissure on the upper southwestern flank of the summit cone is currently feeding this lava flow that already has descended to the base of the cone.
It is well-alimented and seems to have a high flow rate, which gives it the potential to again reach considerable length and approach populated areas beyond the foot of the volcano, if it remains active long enough. However, it is too early to predict how this new eruptive episode will evolve.
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Fuego (Guatemala): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 17000 ft (5200 m) altitude or flight level 170 .
The full report is as follows: FRQ VA EMS to 17000 ft (5200 m)
Sangay (Ecuador): (30 Apr) Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NOT OBS IN SAT.
Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 26000 ft (7900 m) altitude or flight level 260 and is moving at 25 kts in NE direction.
The full report is as follows: INTERMITTENT EMISSION OF VA to 26000 ft (7900 m)
Volcano Activity Summary for 30 Apr 2021:
