December 27 , 2017. EN . Sabancaya , Cumbal , Kilauea , Reventador .

Home / blog georges Vitton / December 27 , 2017. EN . Sabancaya , Cumbal , Kilauea , Reventador .

December 27 , 2017. EN . Sabancaya , Cumbal , Kilauea , Reventador .

December 27 ,  2017.


Sabancaya , Peru :

The number of explosions has increased slightly, averaging 67 EXP / day. The predominance of earthquakes associated with the movement of fluids continues (long period type), followed by events associated with ash emissions (Tremor type) with an average duration of 4 hours / day. Finally, the events related to the rise of the magma (type Hybrids) are very sporadic and low energy

The eruptive columns of gas and ash remained similar compared to last week, reaching up to 2500 m above the crater. The dispersion of these materials occurred within a radius of about 50 km, mainly to the southwest and northwest.

Deformation monitoring at the GNSS station located northeast of the crater showed vertical variations between 4 mm and 8 mm. 
The volcanic gas (SO2) stream recorded on December 15 has a maximum value of 3143 tonnes / day, a value considered moderate. 
Four thermal anomalies were recorded according to the MIROVA system, with values between 2 MW and 11 MW VRP (Irradiated Volcano Power)

In general, eruptive activity maintains moderate levels. No major changes are expected in the following days.

Source : IGP.

Photo : 24/12/2017


Cumbal , Colombia :

Subject: Cumbal Volcano Activity Bulletin.
The level of activity of the volcano is maintained at the level:

On monitoring the activity of the Cumbal volcanic complex, the Colombian Geological Survey reports that:

For the week between 19 and 25 December 2017, the seismic activity of the Cumbal volcano remained at low levels, with a slight increase in frequency over the previous week. The predominant events were those associated with fluid movements within the volcano. The earthquakes were located mainly near the two active centers of the volcanic complex, the crater of La Plazuela in the north-east and the crater Mundo Nuevo in the southwest, with depths less than 5 km from the upper ( 4700 m) and with a maximum local magnitude of M0.7.

The favorable climatic conditions on the volcano favored the observation of gas emissions, which were recorded during the days 19, 21, 23, 24 and 25 December, coming mainly from the fumaroles of the El Verde fields in the North-East and Rastrojos, south-west of the volcanic complex. The emission columns were observed in white, low height, and variable direction of dispersion in the direction of the wind.
The Colombian Geological Survey continues to monitor the evolution of the volcanic phenomenon and will continue to report in a timely manner if changes are detected.

Source : SGC


Kilauea , Hawai :

19°25’16 » N 155°17’13 » W,
Summit Elevation 4091 ft (1247 m)
Current Volcano Alert Level: WATCH
Current Aviation Color Code: ORANGE

Activity Summary:
Kīlauea Volcano continues to erupt at its summit and from the Puʻu ʻŌʻō vent on its East Rift Zone. The episode 61g lava flow is still producing scattered surface flow activity. No lava is entering the ocean at this time. Active lava flows pose no threat to nearby communities at this time. The surface of the lava lake at the Kīlauea summit was about 33 m (108 ft) below the floor of Halemaʻumaʻu crater when measured this morning. There have been no significant changes in ground deformation, seismicity, or gas release across the volcano.

Summit Observations:
The lava lake surface was about 33 m (112 ft) below the rim of the Overlook Vent when measured this morning. Summit tiltmeters have been recording inflationary tilt since yesterday evening. Summit sulfur dioxide emission rates remain high. Seismicity rates were at normal levels, with tremor fluctuations related to lava lake spattering.

Puʻu ʻŌʻō Observations:
No significant changes are evident at Puʻu ʻŌʻō. Glow has been persistent at long-term sources within the crater and from a small lava pond on the west side of the crater. No significant change in tilt has been recorded by the tiltmeter on Puʻu ʻŌʻō cone over the past day. The sulfur dioxide emission rate from the East Rift Zone vents has been steady over the past several months and remains significantly lower than the summit emission rate.

Lava Flow Observations:
The episode 61g flow is still active. Based on overnight web camera images, surface lava flow activity persists on the upper portion of the flow field, on the pali, and in scattered areas along the coastal plain. These lava flows pose no threat to nearby communities at this time. The ocean entry has been inactive since late November.

Source : HVO

Photos : HVO , Bruce Omori.


Reventador , Ecuador :

Information from the Geophysical Institute – EPN.

Activity level of the surface: High. Surface trend: No change
Level of internal activity: No data. Internal trend: No data

Seismicity (events): There is no recorded seismicity for the present.
Rain / lahars: Rain was recorded during the night.

Emission / Ash Columns: Early in the morning, several steam and gas emissions were observed to the west with heights greater than 600 meters above the crater level.
Other monitoring parameters: No change.

Observations: During the night and early in the morning, the volcano was cloudy.

The IGEPN continues to monitor the evolution of the volcanic phenomenon and will continue to report in a timely manner if changes are detected.

Source : IGEPN

Photo : Patrick Taschler.

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