December 11, 2016. EN. Sheveluch , Turrialba , Villarica .

Home / blog georges Vitton / December 11, 2016. EN. Sheveluch , Turrialba , Villarica .

December 11, 2016. EN. Sheveluch , Turrialba , Villarica .

December 11, 2016.


Sheveluch , Kamchatka :

Kamchatka’s Volcano Spews Ash 36,000 Feet Above Sea Level

10 DECEMBER 2016. The Shiveluch volcano, which is the northernmost active volcano in Russia’s Kamchatka Territory, has spewed ash 11,000 meters (over 36,000 feet) above sea level, the Kamchatka branch of the Russian Emergencies Ministry informed in a statement. A huge ash emission from Shiveluch volcano was registered in the morning on December 10, according to the ministry.



« The height of the ash plume was up to 11,000 meters above sea level. The height of the volcano is 3,200 meters [about 10,500 feet], » the Saturday statement said. According to the local emergencies authorities, there are no settlements in the path of the ash plume and no Kamchatka residents were affected by the incident. An orange aviation alert has been issued for the volcano, which is one of the largest in Kamchatka.


Photo: IVS FEB RAS/Y. Demyanchuck


Turrialba , Costa Rica :

Activity report of the Turrialba volcano:
10 December 2016

The Turrialba volcano shows a continuous tremor of small amplitude but variable. This tremor is associated with a constant flow of gases and aerosols, and it sometimes increases for a short period of time producing the ash outlet together with the gases and aerosols. However, the emission, when it was possible to observe it, did not rise beyond 300 meters above the top of the volcano



The wind blew to the southwest and south, so the ash affected the areas surrounding the volcano and the central valley.
There are no reports from residents of the central valley about ash falls or sulfur odors in their localities.

Source : Ovsicori

Photo : Archive Ovsicori


Villarica , Chile :

Activity level GREEN: Active volcano, Stable behavior – No immediate risk – Probable time for a rash: months / years.

A total of 3741 events were recorded, of which 3598 were classified as long-term events, in relation to the fluid dynamics within the volcanic edifice, with reduced displacement values (DRc) of less than 13 cm2. It was also classified 143 volcano-tectonic events (VT) associated with fracturing of rocks. The higher energy event had a local magnitude of M 3.1 and was located 9.7 km, east-south-east of the active crater and 6.9 km deep.



The energy of the volcanic tremor (TR),   seismic signal associated with the fluid dynamics within the volcano, had reduced displacement values (RDc) of 3.2 cm2, which is considered low, while dominant frequencies were between 1.0 and 2.1 Hz and about 4-5 Hz, with the first recorded value being the most persistent during the month.

During this period, there was a slight gradual increase in the energy of the bottom tremor associated with a reduced displacement parameter. This increase can be related to the increase in volcano-tectonic activity located in a characteristic focus located in the East-Northeast (ENE) of the volcano.
The infrasound sensors installed 4 km from the crater of the volcano, reported minor explosions associated with the surface activity of the lava lake housed inside the main crater. The maximum value calculated was 8 pascals, but the average was about 2.4 pascals reduced.
Images recorded with IP cameras installed near the volcano, when weather conditions allowed the upper part of the volcano to be observed, on clear or low cloud days, showed a predominantly white color degassing with an column of less than 400 m and an incandescence.



According to the data obtained from three (3) GNSS stations monitoring the deformation of the volcano, variations slightly greater than the previous period in the vertical components were observed, reaching 1.1 cm / month, calculation of the horizontal displacements of the volcano. Checkpoints show a rate of 0.7 cm / month, considered low. This also shows that the length of the control line passing through the volcano is stable. On the other hand, the data provided by two (2) inclinometers show minor variations that could be related to meteorological effects.

Data obtained by the DOAS team , Los Nevados and Tralco station located 10 km east-northeast (ENE) and 6 km east-south -Est (ESE) of the active crater, respectively, recorded an average value in the sulfur dioxide (S02) emission of 231 ± 53 tonnes / day with a maximum value of 713 ± 35 tonnes / day reported on 19 November. Therefore, this shows that the flows remain within the reference levels.
No anomalies were reported in sulfur dioxide (SO2) emissions in the volcano sector, according to information reported by the IMO (Ozone Monitoring Instrument) on its website http: // so2. / and NESDIS (
Thermal alerts were reported in the volcano region, the largest of which occurred on November 11 with a 30 MW VOLCANIC (VPR) radiative power, which is considered moderate, according to data published by the Middle InfraRed Observation of Volcanic Activity (Mirova) on its website (


During the month, the monitoring parameters of the Villarica volcano showed a slight increase in volcano-tectonic activity, in conjunction with the parameters of reduced displacements of the bottom tremor. Moreover, the seismic activity remains on its basic levels. As for the recorded surface seismic activity, it is mostly associated with the dynamics of a fluctuating lava lake, in an open duct type volcanic system, with low potential degassing pulse phenomena, sporadic explosions of low intensity, concentrated within the volcanic channels, with the risk of rising and falling magmatic material in the area adjacent to the main crater.

For this, the level of alert is maintained at the level Green, with the maintenance of a zone of exclusion of 500 m around the crater.


Source : Sernageomin

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