March 21 , 2017. EN. Planchón- Peteroa , Fuego , Sabancaya .

Home / blog georges Vitton / March 21 , 2017. EN. Planchón- Peteroa , Fuego , Sabancaya .

March 21 , 2017. EN. Planchón- Peteroa , Fuego , Sabancaya .

March 21 , 2017.


Planchón- Peteroa , Chile :

– A total of five hundred and sixty-three (563) seismic events associated with the dynamics of the volcanic complex, of equal local magnitude (ML) or less than M2.1 were classified. The seismic energy accumulated during the period remained low and similar to the previous period. Seventy-five (75) seismic events have been associated with rigid material fracturing processes, called volcano-tectonic earthquakes (VT). The most energetic event presented a local magnitude (ML) equal to M2.1, and was located 1.4 kilometers north – northwest (NNO) of the active crater at a depth of 4.7 Km. In addition, four hundred and eighty-eight (488) earthquakes related to fluid dynamics within the volcanic edifice, known as long-period events (LP), with the greatest energy having a reduced displacement value ) Of 9 cm2, which is considered to be low, were recorded.

– The images obtained by the IP cameras which monitor the volcano show the presence of the small column of low-energy white gas associated with heights that do not exceed 100 m above the crater of the volcanic complex.
– Based on data obtained from three (3) GNSS stations, which measure the deformation of the volcano surface, displacements are observed at approximately 0.5 cm / month in one of the monitoring stations, resulting in A slight increase in the length of the control line crossing the volcano. All vertical components remain constant. Data provided by one (1) electronic inclinometer do not indicate significant variations, suggesting that there are no significant changes or trends in deformation of the volcano surface.

– No emissions of sulfur dioxide (SO 2) into the atmosphere in the volcanic field have been reported, according to data published by IMO, Group Sulfur dioxide ( /) And NESDIS (
– No thermal alerts were reported in the area associated with the volcano according to the data processed by Mirova, ( and MODVOLC ( ).

Compared to recent periods, the seismic activity of the volcanic complex underwent a slight decrease in the energy of the recorded events, which is added to a very low deformation rate of the volcanic system. However, seismic activity continues above its basal level and the appearance and characteristics of the events indicate the continuation of a dynamic process in the deep magmatic complex system, which does not appear to affect the surface hydrothermal system. In this context, there is a possibility of developing a direct interaction between the two systems, with the consequent generation of lower explosive activity in the first case, which would affect areas near active craters and / or of low to moderate ash emissions.

Consequently, the hazard zone is considered to remain within a radius of 1 km around the active crater zone, recommending that access be restricted. The level of volcanic alert remains at:
YELLOW LEVEL: changes in the behavior of volcanic activity – probable time for a rash: weeks / months.


Source : Sernageomin

Photos : Insivumeh , Volcanes de Chiles.


Fuego , Guatemala :

Activity type: Vulcanian
Morphology: composite stratovolcan
Geographical location: 14 ° 28’54˝ Latitude N; 90 ° 52’54˝ longitude W.
Height: 3,763msnm.
Weather conditions: Clear
Wind: Northeast 10 km / h
Precipitation: 0 mm

Persistence of small white fumaroles at a height of about 4,300 meters (13,107 feet) scattered to the west, southwest and south. 19 explosions were reported, 15 were weak and 4 were moderate, resulting in columns of gray ash at a height of about 4,400 to 4,700 meters (14,435 to 15,419 feet) moving 10 km west, South-West and South. Incandescent pulses 150 to 200 m above the crater caused volcanic material of different sizes to fall from a distance of 200 meters from the crater and moderate avalanches around the crater. The explosions are accompanied by low rumblings and sounds similar to locomotive machines every 3 minutes. Ash falls are reported in the areas of Morelia, Hagia Sophia, El Porvenir, Pamimaché I and II, among others.

Source : Insivumeh

Photo : Fotonoticia


Sabancaya , Peru :

36 explosions per day, similar to last week, were observed; Reduced displacement values increased to a value of 101 cm2. There was a significant seismic activity associated with magma uplift (hybrid earthquakes and long period). In addition, a volcano-tectonic earthquake of 2.6 ML proximal magnitude was located 5 km southwest of the Sabancaya Crater.
• Eruptive ash and gas columns were ~ 2500 meters above the crater and then spread more than 30 km to the northwest, southwest and south.

• The deformation did not show any significant significant change. The minimum variations recorded are within the margin of error of the equipment.
The flow of volcanic gas (SO2) reached a maximum of 2391 tons / day, recorded on March 17th.
Seven thermal anomalies were detected with values between 1 and 26 MW of VRP (volcanic radiated power).

In general, eruptive activity remains moderate, similar to last week.

Source : IGP

Photo : IGP

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