Volcanic activity worldwide 3 Nov 2023: Klyuchevskoy volcano, Popocatépetl, Semeru, Ibu, Dukono, Re…

Map of today’s active volcanoes

Reykjanes (Reykjanes peninsula (SW Iceland)): The Icelandic Met Office has published a new map indicating the area where magma is believed to be currently accumulating beneath the surface:Link to high-res version
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From the latest update:
„According to measurements from 11:00 am today, the uplift centered northwest of Þorbjörn continues. The uplift is caused by a magma intrusion at a depth of about 4 km. Seismic activity continues on the Reykjanes peninsula due to crustal stress changes caused by the intrusion. An increase in earthquake activity was detected after midnight and into the morning.

…3 Nov:
The seismic activity has picked up significantly today. Over the past 24 hours, there have been more than 500 quakes of magnitudes up to 4.3 near Reykjanes volcano:
4 quakes above magnitude 4
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15 quakes between magnitude 3 and 4
63 quakes between magnitude 2 and 3

Klyuchevskoy (Kamchatka): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo 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: POSS VA EMISSIONS CONTINUING OBS VA DTG:03/1720Z to 23000 ft (7000 m)

Mayon (Luzon Island, Philippines): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION AT 20231103/1456Z VA CLD UNKNOWN REPORTED OBS VA DTG:03/1530Z

Ibu (Halmahera, Indonesia): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: DISCRETE VA TO FL080 MOV NE REPORTED AT 03/1020Z
…3 Nov:
The effusive-explosive activity at the volcano continues.
Near-frequent vulcanian-sized eruptions take place from the cinder cone within the summit caldera.
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The PVMBG observatory’s surveillance cameras observed and explosion yesterday morning. A grey ash column rose to an altitude of 1,900 meters and drifted southwest.
The seismic network reported signal with a maximum amplitude of 28 mm and a duration of 54 seconds.

Semeru (East Java, Indonesia): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin warned about a volcanic ash plume that rose up to estimated 14000 ft (4300 m) altitude or flight level 140 and is moving at 10 kts in NW direction.
The full report is as follows: VA TO FL140 LAST REPORTED 03/1448Z EST VA DTG:03/1740Z to 14000 ft (4300 m)

Dukono (Halmahera): (3 Nov) The explosive eruption at the volcano continues.
The Pusat Vulkanologi dan Mitigasi Bencana Geologi (PVMBG) local observatory reported an eruption from the volcano at 08:30 local time this morning. A grey-to-black ash column rose to an altitude of 5,577 ft (1,787 m) and drifted south.
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In order to mitigate risk, people are advised to avoid the area within a radius of 2 km from the crater.

Shishaldin (Aleutian Islands, Alaska): Low-level ash emissions from the new eruption at the volcano are no longer detected, the AVO reported.
Seismic recordings and infrasound data have depicted a decline in the activity.
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The Aviation Color Code remains at Orange.

…3 Nov:
The Alaska Volcano Observatory (AVO) reported that a new explosive eruption commenced at the volcano at about 03:40 local time early this morning and is likely still ongoing.
An ash plume was observed at 04:00 local time at an elevation of 20,000 ft, according to the National Weather Service. The Volcanic Ash Advisory Center (VAAC) Anchorage reported ash emissions rising to 30,000 ft.
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The eruption was preceded by a usual sharp peak in tremor, indicating magma moving upwards through the volcanic conduits.
The local AVO observatory is monitoring the volcano closely and will issue additional Volcanic Activity Notices about significant changes in activity as they occur.

Popocatépetl (Central Mexico): 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: LGT VA EMS 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 20000 ft (6100 m) altitude or flight level 200 .
The full report is as follows: LGT VA MOV NE to 20000 ft (6100 m)
…3 Nov:
The effusive-explosive eruption of the volcano continues.
The lava continues to emerge onto the SE flank ravine, keep the flow active and slowly advance nearly to the base of the edifice.
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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-20,000 ft) elevation in the western-southwestern direction. Most of the ejected hot, juvenile and glowing material slid down along the southeastern flank in the form of incandescent avalanches.

Reventador (Ecuador): 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 RPRT RCVD 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 24000 ft (7300 m) altitude or flight level 240 and is moving at 10 kts in W direction.
The full report is as follows: continuous ash emissions to 24000 ft (7300 m)

Volcano Activity Summary for 3 Nov 2023:

Approximate center of magma intrusion according to model calculations based on GPS and satellite images together with seismic activity from November 2nd at 8pm to November 3rd at 12pm larger that M1.0 in size. The model assumes a box-shaped intrusion, but its length and width are subject to quite a bit of uncertainty. The model will be frequently updated with the newest data once aquired, and the size and shape of the intrusion might change considerably, so there is quite some uncertainty to the model. (image: IMO)