Volcanic activity worldwide 18 Oct 2021: Fuego volcano, Reventador, Piton de la Fournaise, Sangay, L...

La Palma (Canary Islands (Spain)): The eruption continues with no significant changes. At the vent, a lava flow is being erupted and intense ash emissions create an eruption column rising to approx. 4000 m.
Although the activity has been much less noisy recently, the continuous gas and ash emissions, often in combination with little wind has been causing lots of ash fall and poor air quality in the Ariadne Valley, which is an increasing problem.
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The lava flows have advanced a bit along the active northern fronts, but the northwestern flow has not yet created a new sea entry (although it might occur soon).

Tremor remains at similar levels as during the past weeks, even a bit above average.


Suwanose-jima (Ryukyu Islands): Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTED AT 20211018/1117Z OVER FL060 STNR OBS VA DTG:18/1110Z

Manam (Papua New Guinea): (18 Oct) Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Darwin 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: DISCRETE VA EMISSION TO FL080 OBS MOV NW AT 18/0600Z to 8000 ft (2400 m)

Semisopochnoi (United States, Aleutian Islands): Volcanic Ash Advisory Center Anchorage (VAAC) issued the following report: VA NOT IDENTIFIABLE FROM SATELLITE.

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 and is moving at 10 kts in SW direction.
The full report is as follows: CONS VA EMS OBSD 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 19000 ft (5800 m) altitude or flight level 190 .
The full report is as follows: OCNL VA EMS OBSD to 19000 ft (5800 m)

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: FRQ VA EMS OBSD to 19000 ft (5800 m)

Reventador (Ecuador): Mild explosive activity continues from the volcano. The Volcanic Ash Advisory Center (VAAC) Washington reported intermittent emissions of volcanic ash plumes.
The full report is as follows: sporadic emissions of volcanic ash

Sabancaya (Peru): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 25000 ft (7600 m) altitude or flight level 250 .
The full report is as follows: INTERMITTENT EMISSIONS to 25000 ft (7600 m)

Nevados de Chillán (Central Chile): Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Buenos Aires warned about a volcanic ash plume that rose up to estimated 15000 ft (4600 m) altitude or flight level 150 and is moving at 15 kts in NE direction.
The full report is as follows: SPORADIC EMISSIONS to 15000 ft (4600 m)

Piton de la Fournaise (La Réunion): Alarm level 1 has been issued for the volcano, as there are signs that a new eruption is likely going to happen in the very near future.
A seismic crisis started under the volcano at 4:33 a.m. this morning, including hundreds of earthquakes, which are characteristic of rapid magma ascent.
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So far, the volcano observatory (OVPF) has recorded 627 volcano-tectonic and 176 long-period earthquakes, concentrated under the northeast of the caldera, near the Piton de Crac cone. The quakes are very shallow, at depths between 1.2 km below sea level and 0.6 km above sea level. While magma still might stagnate and remain an underground intrusion, it is more likely that there will be an eruption within hours.
OVPF wrote that it cannot be ruled out that a fissure opens at low elevation; the longer the seismic crisis lasts, the more likely such a scenario will be.

Volcano Activity Summary for 18 Oct 2021: