Fagradalsfjall (Reykjanes Peninsula, Iceland): (5 Apr) A new eruptive fissure opened today approx. 1 km northeast of the so-far active eruption site. The seismic network detected at 11:37 local time a sharp peak in tremor at 1 km depth, which announced its formation shortly after as magma broke through the surface along a new section further upslope on top of the active magma intrusion underneath.
According to the Icelandic Met Office (IMO), the new eruptive fissure is about 500 m long. It actually seems to consist of two close-by fractures, a larger and a smaller one, both erupting small lava fountains and feeding a new lava flow towards the east.
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Sakurajima (Kyushu, Japan): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 5000 ft (1500 m) altitude or flight level 050 .
The full report is as follows: VA AT 20210406/1530Z FL050 EXTD S OBS VA DTG:06/1530Z to 5000 ft (1500 m)
…6 Apr:
The explosive activity of the volcano continues characterized by near-constant eruptions.
A moderate-to-strong vulcanian-type explosion occurred at 06:41 local time yesterday as the Japan Meteorological Agency (JMA) noted. An ash plume rose to estimated altitude of 4 km and drifted SE as visible in the attached video. A lava bombs were ejected as far as 800 m away from the crater.
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Suwanose-jima (Ryukyu Islands): (6 Apr) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: EXPLODED AT 20210406/0135Z OVER FL050 EXTD SW OBS VA DTG:06/0130Z
Ibu (Halmahera, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin 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: CONTINUOUS VA TO FL060 OBS MOV S AT 06/0910Z to 6000 ft (1800 m)
Dukono (Halmahera): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 7000 ft (2100 m) altitude or flight level 070 and is moving at 10 kts in SE direction.
The full report is as follows: CONTINUOUS VA EMISSIONS TO FL070 EXT SSE OBS VA DTG:06/1130Z to 7000 ft (2100 m)
Veniaminof (Alaska Peninsula, USA): (6 Apr) The Alaska Volcano Observatory’s (AVO) surveillance cameras observed a minor ash emissions from the summit.
This may indicate a renewed activity of the volcano and therefore the volcanological observatory raised the Aviation Color Code to Orange.
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Semisopochnoi (United States, Aleutian Islands): (6 Apr) A minor ash emissions occurred from the North Cerberus crater on 1 April as visible in the satellite image. No widely dispersed ash was seen in later data.
Source: Alaska Volcano Observatory volcano activity update 6 April 2021
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: PSBL CONTG OCNL VA EMS. to 19000 ft (5800 m)
Reventador (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA NOT OBS IN SAT.
Sabancaya (Peru): Volcanic Ash Advisory Center Buenos Aires (VAAC) issued the following report: UNABLE TO DETECT
