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Volcanic activity worldwide 13 Feb 2018: Fuego volcano, Popocatépetl, Dukono, Agung, Reventador, Tu...

Furnas (Sao Miguel Island, Azores): An earthquake swarm has been going on since Monday (12 Feb 2018) in central Sao Miguel island.
The Volcano Observatory (Observatório Vulcanológico e Sismológico da Univ. dos Açores, CIVISA) recorded dozens of mostly small quakes at shallow depths between 1-15 km in an area about 6-7 km west of Furnas volcano, half way between the caldera lakes of Lagunas Fogo and do Congro. The largest were 6 earthquakes of magnitudes 3.0-3.6, some of which were felt by local inhabitants.
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At the moment, the activity is still continuing, but has decreased significantly. It is unclear whether the earthquakes are volcanic in origin or not. If so, they could have been caused by a small magma intrusion at the lower crust and indicate an early sign of possible re-awakening of the volcanic system.
The only recorded eruptions in the area came from Furnas volcano, one around 1439-1443 and a strong explosive one in 1630, which caused significant damage and fatalities.


Mayon (Luzon Island, Philippines): The volcanic activity has continued with little changes, but shown a decreasing tendency. A recent gas measurement suggests a strong decrease in SO2 output from the volcano, which could suggest a beginning exhaustion of the magma supply.
On the other hand, GPS and tiltmeters continue to see inflation (swelling) of the volcanic edifice caused by internal magma pressure.
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According to the latest bulletin from PHILVOLCS, "sporadic and weak lava fountaining" occurred in several episodes lasting between 3 and 55 minutes.
The view of the summit has been mostly obscured by clouds, but occasional partial views confirm that the lava flows and incandescent rockfall activity continues, mainly in the Miisi and Bonga-Buyuan channels.

...13 Feb:
Volcanic Ash Advisory Center Tokyo (VAAC) issued the following report: ERUPTION VA CLD UNKNOWN REPORTED AT 20180213/0907Z OBS VA DTG:13/0910Z

Dukono (Halmahera): Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CONTINUOUS VA EMISSIONS TO FL060 OBS VA DTG:13/1245Z

Agung (Bali): The eruption of the volcano has not ended: Just few days after the official alert status of the volcano had been decreased from 4 (highest) to 3 on the Indonesian scale of 1-4, a sudden, moderately violent explosion occurred this morning.
The short-lived explosion began at 11:49 local time and produced a dense ash-loaded plume that rose quickly to approx. 1500 m above the volcano. It seems likely to have been a vulcanian-style explosion, caused by sudden release of accumulated gas pressure trapped inside the sticky magma in the upper conduit, and shows that even though the overall activity has been slowing down and the eruption is likely approaching its end, the volcano remains dangerous.
...13 Feb:
Volcanic Ash Advisory Center Darwin (VAAC) issued the following report: CVGHM REPORT ERUPTION TO FL150 MOV E AT 13/0400Z.

Popocatépetl (Central Mexico): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: LGT VA EMS
...13 Feb:
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: NEW VA EM OBSD

Fuego (Guatemala): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: CONT VA EMS
...12 Feb:
Volcanic Ash Advisory Center Washington (VAAC) issued the following report: VA EM NOT OBSD

Turrialba (Costa Rica): Volcanic Ash Advisory Center Washington (VAAC) issued the following report: POSS VA

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

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