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Volcanic activity worldwide 14 Nov 2013: Sakurajima, Klyuchevskoy, Popocatépetl, Reventador, Sinabu...

Thursday Nov 14, 2013 14:02 PM |

Current tremor signal (ESLN station, INGV Catania)
Current tremor signal (ESLN station, INGV Catania)
Tremor amplitude (EFTI station), cut off in the morning of 11 Nov when the station was covered by lava
Tremor amplitude (EFTI station), cut off in the morning of 11 Nov when the station was covered by lava
Giant steam ring (ring vortex) rising from Klyuchevskoy this morning
Giant steam ring (ring vortex) rising from Klyuchevskoy this morning
Vulcanian explosion from Sakurajima this morning with lightning in the ash plume
Explosion and small pyroclastic flow from Reventador on 2 Nov 2013
Explosion and small pyroclastic flow from Reventador on 2 Nov 2013
MODIS / Terra satellite image 11 Nov showing the gas plume and discolored water plume
MODIS / Terra satellite image 11 Nov showing the gas plume and discolored water plume
MODIS hot spot data (past 7 days) for Heard volcano (ModVolc, Univ. Hawaii)
MODIS hot spot data (past 7 days) for Heard volcano (ModVolc, Univ. Hawaii)
Etna (Sicily, Italy): Activity at the New SE crater has decreased during the night, but probably weak strombolian explosions still occur from time to time. At the moment, weather is very bad and visible observations difficult. The tremor decreased as well, but has gained again and continues to show an overall increasing trend, similar to the days before the 10-11 Nov paroxysm.

...13 Nov:
The last recorded signal from the Torre del Filosofo seismic station (ETFI), showing the tremor intensity at unprecedented levels. If the eruption size is more or less proportional to the integral of the tremor amplitude, this illustrates the size of the paroxysm:

Klyuchevskoy (Kamchatka): The volcano remains active. It produces a variable but often intense steam plume with possibly some ash. On webcam images, there are sporadic small explosions visible, suggesting that weak strombolian activity continues at the summit. A large steam ring was produced this morning (see image / video) - similar to what we have observed at Etna last Monday.

Aso (Kyushu): The Japan Meteorological Agency reported in its latest activity summary (for September 2013) a seismic crisis that started on 23 September evening. An survey of SO2 emissions 2 days later showed an increase of gas release as well, suggesting a magmatic intrusion was taking place. No eruption has taken place since then.
Japanese volcanologists immediately raised the alert level from 1 to 2, as there is a possibility of sudden explosions that could throw blocks to distances of perhaps as far as 1 km. The new alert level means that the active Nakadake 1 crater is currently closed for access.
In late September seismicity remained high, but with a declining trend. No other information was given in the report.

Sakurajima (Kyushu, Japan): The volcano has picked up activity again. Over the past days, the Showa crater has been producing near-constant ash emissions and several vulcanian explosions with ash plumes rising up to 14,000 ft (4.2 km) altitude.

Bagana (Bougainville Island, Papua New Guinea): Explosions continue. An ash plume was spotted this morning at 9,000 ft (2,7 km) altitude extending 60 nautical miles to the west.

Sinabung (Sumatra, Indonesia): Eruptions seem to increase. Over the past days, ash explosions have occurred at rates of 1-2 per day. Ash plumes rose to 10,000-12,000 ft (3-3.6 km) altitude. At least one pyroclastic flow occurred on 11 Nov, reaching about 1 km length.
Several 1000 people have been evacuated from nearby villages at the foot of the volcano and a (dangerously small) 3 km exclusion zone around the volcano is in place.

Popocatépetl (Central Mexico): Activity has remained stable at low levels. CENAPRED reported 61 weak emissions of mostly steam, gas and only occasionally minor amounts of ash during the 24 hour observation interval between 12-13 Nov.

Reventador (Ecuador): The activity consisting of sporadic small to moderate explosions continues but has decreased after 2 November. On that day, a small pyroclastic flow descended on the west flank of the active cone, reaching a length of 300-400 m. Explosions produced plumes of up to about 2 km height and light ash fall occurred in San Rafael village located 8 km east of the volcano.
The following webcam time-lapse show the activity during 2-3 Nov when the weather was unusually clear. There are small explosions and a small tornado next to the cone caused by turbulence between ambient and rising hot air.

Jebel Zubair (Red Sea): Signs of weak continuing or renewed activity could be spotted again on recent satellite data after few weeks with no evidence of activity.
The attached MODIS / Terra satellite image from 11 Nov shows a gas plume drifting NE from the new island as well as a discolored water plume extending south. The discolored sea water is likely caused by dissolved volcanic gasses (H2S in particular).
The absence of steam suggests that there is no lava entering the sea and no submarine effusive activity.

Heard (Australia, Southern Indian Ocean): A thermal hot spot was visible on satellite data from 9 Nov, suggesting that some activity continues or has resumed at the remote volcano.
Vorig nieuws
Strombolian eruption at New SE crater 11 Nov 2013 evening
Wednesday, Nov 13, 2013
Etna (Sicily, Italy): 2 new sets of pictures from the beginning and end of the 10-11 Nov paroxysm: ... [meer...]
Current tremor signal (ESLN station, INGV Catania)
Tuesday, Nov 12, 2013
Etna (Sicily, Italy): Strombolian activity at the NSEC ceased during the night, and the lava flows from the last paroxysm are no longer active today. Tremor has returned to low levels. ... [meer...]
Current tremor amplitude (ECPNZ station, INGV Catania)
Monday, Nov 11, 2013
Etna (Sicily, Italy): The awaited new paroxysm of Etna's NEW SE crater started last night and is still in full progress. Unfortunately, a snow storm above the summit area prevents detailed observations, but judging from the seismic signal, this eruption is unusually long and intense (and still growing at the time of updating). Ash fall has been reported from villages to the E/NE (Zafferana, Milo etc), where the plume is carried to by strong Libeccio winds. ... [meer...]
Current tremor amplitude (ECPNZ station, INGV Catania)
Sunday, Nov 10, 2013
Etna (Sicily, Italy): Strombolian explosions (sometimes relatively large) from the New SE crater continued with little changes. Tremor levels show a no indication whether or not a new paroxysm is going to occur soon. A very slow rising trend is visible over the past week. ... [meer...]
Explsion from Etna's New SE crater this afternoon
Saturday, Nov 09, 2013
Etna (Sicily, Italy): A relatively large explosion has occurred some minutes ago. Volcanic tremor still doesn't show a clear trend. ... [meer...]

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