Volcanic activity worldwide 10 Jul 2023: Etna volcano, Fuego, Popocatépetl, Krakatau, Karangetang, …

Map of today’s active volcanoes

Etna (Sicily, Italy): While the volcano has been overall relatively calm during the past weeks, a sudden explosion occurred this morning from the southeast summit crater.
The eruption lasted about two minutes only and produced a dense brown ash plume that rose a few 100 meters and quickly dispersed to the southwest. No significant changes in volcanic tremor accompanied the event and there has been no official statement from the volcano observatory so far.
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It is possible that the event did not involve any fresh magma and was driven purely by an internal phreatic explosion as trapped water can interact with hot rocks or residual magma inside the conduit.

Eldey (Reykjanes Ridge, Iceland): A new effusive eruption started around 16:40 local time, associated by an opening of a chain of eruptive vents in the area close to Litli Hrútur, between Fagradalsfjall and Keilir.
A new batch of magma has been injected on the surface through a 200-meters long, northeast-southwest arranged eruptive fissure, generating a series of low lava fountains. New lava flows started to travel towards the south direction.
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As the eruption is considered minor, no ash emissions have been emitted into the atmosphere so far.
Fortunately, the current eruptive site is located in an unhabitated region, and has posed no imminent risks to communities and/or infrastructure so far.

…10 Jul:
Late on Sunday, Jul 9, 2023, the so-far strongest quake in the swarm hit 1.6 Km E of Keilir on the Reykjanes peninsula. It was widely felt throughout southwestern Iceland. Its location marks the area where the shallow magmatic intrusion is located at probably now less than 1 km depth and is expected to break through the surface at any time now.
Video of the quake:
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Caught on camera: 5.3 earthquake at around 22:23 local time, potentially the most powerful earthquake yet measured in this sequence #Iceland #volcano pic.twitter.com/aGJFXzjeer

— Duncan (@shaksper) July 9, 2023

Even though the rate of earthquakes has slowed a bit in numbers, but many scientists believe that this is because the intruding magma is now meeting softer rocks composed of still partially molten residual magma from the 2021 and 2022 eruptions.

Fagradalsfjall (Reykjanes Peninsula, Iceland): Volcanic Ash Advisory Center London (VAAC) issued the following report: SMALL ERUTPTION OBS VA DTG:10/1733Z
…10 Jul:
The Icelandic Met Office which is closely monitoring the situation on (and below) the ground on the Reykjanes peninsula is now thinking that an eruption is „highly likely“, possibly within hours or few days.
From the latest official update:
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„Today marks 5 days since the onset of the seismic sequence between Fagradalsfjall and Keilir caused by a magmatic intrusion just north-east of the location of the 2022 dike intrusion that resulted in an eruption 5 days later.
Deformation in the area continues to slow down and seismicity is relatively quiet around the dike location.

…10 Jul:
Late on Sunday, Jul 9, 2023, the so-far strongest quake in the swarm hit 1.6 Km E of Keilir on the Reykjanes peninsula. It was widely felt throughout southwestern Iceland. Its location marks the area where the shallow magmatic intrusion is located at probably now less than 1 km depth and is expected to break through the surface at any time now.
Video of the quake:
… [read more] … [show less]

Caught on camera: 5.3 earthquake at around 22:23 local time, potentially the most powerful earthquake yet measured in this sequence #Iceland #volcano pic.twitter.com/aGJFXzjeer

— Duncan (@shaksper) July 9, 2023

Even though the rate of earthquakes has slowed a bit in numbers, but many scientists believe that this is because the intruding magma is now meeting softer rocks composed of still partially molten residual magma from the 2021 and 2022 eruptions.

Reykjanes (Reykjanes peninsula (SW Iceland)): A new effusive eruption started around 16:40 local time, associated by an opening of a chain of eruptive vents in the area close to Litli Hrútur, between Fagradalsfjall and Keilir.
A new batch of magma has been injected on the surface through a 200-meters long, northeast-southwest arranged eruptive fissure, generating a series of low lava fountains. New lava flows started to travel towards the south direction.
… [read more] … [show less]
As the eruption is considered minor, no ash emissions have been emitted into the atmosphere so far.
Fortunately, the current eruptive site is located in an unhabitated region, and has posed no imminent risks to communities and/or infrastructure so far.

Ebeko (Paramushir Island): (10 Jul) Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20230710/0255Z FL100 EXTD N-E REPORTED OBS VA DTG:10/0300Z

Mayon (Luzon Island, Philippines): The elevated activity at the volcano continues.
Dome-block avalanches and pyroclastic flows continue to descend over the southern Mi-isi, southeastern Bonga and eastern Basud ravines, reaching length of at least 4000 m. Pyroclastic density currents usually form ash plumes – phoenix clouds – towering wall of cloud rising above pyroclastic torrent. The reason for this flow was presumably a destabilization of the lava dome resulting in the partial collapse.
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Two main lava flows on the southern Mi-si and southeastern Bonga ravine remain active, currently 2.8 km and 1.4 km long.
Near-constant emissions of steam-laden plumes (so-called degassing) rose 800 meters above the summit and drifted west. Sulfur dioxide (SO2) emissions reached to a 943 tonnes on 9 July.

Karangetang (Siau Island, Sangihe Islands, Indonesia): The extrusive activity of the volcano continues to be elevated.
The actively growing lava dome within the Crater 1 caused triggering a massive pyroclastic flow this morning. A huge amount of debris and dome-block avalanches raced down over the south-southwestern slopes. Viscous magma is being slowly intruded and piled up in the inner summit crater, which makes the lava dome prone to collapse into hot rock falls.
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The Volcanic Ash Advisory Center (VAAC) Darwin reported ash emissions, which reached 8,000 ft (2,400 m) altitude and drifted E.

Krakatau (Sunda Strait, Indonesia): Our VolcanoDiscovery Indonesia tour guide Galih Jati observed the volcano during the ongoing From Krakatau to Bali tour.
He reported explosions from the cinder cone at roughly regular intervals of every 30 minutes.
Several violent phreatic eruptions occurred, sending lapilli-to-bomb-sized fragments onto the various slope of the cinder cone. The event was characterized as phreatic, i.e. steam driven only, caused by overheated water flashing to steam.

Popocatépetl (Central Mexico): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 21000 ft (6400 m) altitude or flight level 210 .
The full report is as follows: VA EMS OBSD to 21000 ft (6400 m)

Fuego (Guatemala): 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: NEW VA EMS to 15000 ft (4600 m)

Nevado del Ruiz (Colombia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Washington warned about a volcanic ash plume that rose up to estimated 23000 ft (7000 m) altitude or flight level 230 .
The full report is as follows: VA CLDS OBSD to 23000 ft (7000 m)

Reventador (Ecuador): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EMS OBSD

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 27000 ft (8200 m) altitude or flight level 270 and is moving at 25 kts in S direction.
The full report is as follows: STRONG PUFF OF VA to 27000 ft (8200 m)

Volcano Activity Summary for 10 Jul 2023:

Ash eruption from Etna this morning (image: vendetta.org webcam)