September 08 , 2017. EN. Planchon Peteroa, Nevados de Chillan , Bárðarbunga , Piton de la Fournaise , Sheveluch.
September 08 , 2017.
Volcanic complex Planchôn – Peteroa , Chile :
During this period, 737 earthquakes were recorded, of which 12 were related to rock fracturing processes, known as volcanic tectonics (VT) with maximum local magnitudes of M 2.8, for an earthquake located 1.3 km north – Is active craters, at a depth of 5.3km. The vast majority of events were located north of the craters, at a maximum distance of 5 km and predominant depths of between 4 and 7 km.
For events related to fluid dynamics (called long period, LP), seven hundred and twenty-five (725) events were classified, with reduced displacement values (DRc) of less than 7 cm2.
The images of the IP camera showed the presence of small degassings of low energy and whitish coloration that do not exceed 50 m above the level of the active craters of the Volcanic Complex.
From the data obtained by two (2) GNSS stations, which measure the deformation of the volcanic complex, there were minor variations, both in the horizontal and vertical movements of the monitoring stations. On the other hand, the data provided by one (1) electronic inclinometer, installed on the complex, also show no modifications related to the morphology of the volcano.
No anomalies were reported in sulfur dioxide (SO2) emissions to the atmosphere in the area near the volcanic complex, according to data from the Ozone Monitoring Instrument (OMI) //so2.gsfc.nasa .gov /) and National Environmental Satellite, Data, and Information Service (NESDIS) (http://satepsanone.nesdis.noaa.gov).
No thermal alert was reported in the area associated with the volcanic complex according to the data published by the IR (MIROVA) on its website (http://www.mirovaweb.it/.
Monitoring parameters indicate that the volcanic system has an activity level above its baseline level, with significant opportunities for increasing and / or producing ash emissions. For all this, the volcanic complex is maintained at the level:
LEVEL Yellow: Active volcano with stable behavior – No immediate risk – Time for a possible eruption: MONTHS / YEARS
Note: It is recommended to restrict access within a radius of 1000 meters around the crater.
Source : Sernageomin
Nevados de Chillan , Chile :
During this period, 991 seismic events were recorded, of which 52 were classified as volcano-tectonic (VT) events in relation to rock fracturing processes, with maximum local magnitudes of M1.7. The largest amplitude earthquake was located at 0.3km north-north-east of the active crater, at a depth of 1.7 km. Similarly, 939 earthquakes associated with fluid dynamics within the volcano were recorded, of which 865 were classified as long-period (LP) events with reduced maximum displacement values (DRC) of 257 cm2. In addition, 69 events of the tremor type were recorded, with maximal displacement values (DRC) of 10 cm2. Finally, 5 long-term events called « Tornillos » (TO) were recorded in relation to the transit of magmatic and / or hydrothermal fluids in volcanic ducts, with high impedance characteristics with displacement values less than 1.1 cm2.
Between August 15 and August 31, there were a total of forty-eight (48) explosions associated with ash emissions and / or microphone recordings, continuing the explosive phase of this volcano since the beginning of 2016. The explosion that released the highest seismic energy was recorded on August 30 at 07:53 local time and is associated with an earthquake with a reduced displacement value of 90 cm2.
The images obtained through the webcams installed near the volcanic complex showed mainly fumaroles associated with water vapor emissions with ash from currently active craters with column heights below 1000 m above sea level. crater.
According to the data provided by the GNSS stations, no deformation is observed due to changes in the morphology of the volcano. The data provided by the inclinometers display stable positions over time.
No emission of sulfur dioxide (SO2) into the atmosphere has been reported in the volcanic complex sector, according to data published by the Ozone Monitoring Instrument (OMI) (http: // so2.gsfc.nasa.gov/) and the National Environmental Satellite Information and Data Service (NESDIS) (http://satepsanoine.nesdis.noaa.gov).
No thermal alerts were reported in the area associated with the volcanic complex according to the data processed by the IR (MIROVA) (http://www.mirovaweb.it/) and time-based thermal monitoring Global Hot-Spots (MODVOLC) (http://modis.higp.hawaii.edu/).
During this period, a less explosive activity of pulsating nature was recorded, which resulted in gases and particles with heights of 1000 m above the level of the crater. Monitoring station data suggest the action of a small volume of magma interacting with the surface hydrothermal system which destabilizes it and induces minor explosions with the subsequent emission of material to the surface in a pulsatile manner. Therefore, in the current scenario, it is possible that this process will continue with the generation of explosions of similar size or even larger than those recorded. Due to the foregoing, the Volcanic Technical Alert is maintained at:
YELLOW LEVEL: Changes in the behavior of volcanic activity – Probable time for eruption: WEEKS / MONTHS.
Remarks: Preventive restrictions are recommended to access an area adjacent to the crater within a radius of 3 kilometers.
Source : Sernageomin.
Bárðarbunga , Iceland :
A number of earthquakes were detected at Bárðarbunga in Vatnajökull tonight, according to the Icelandic Met Office. The largest quake was 4.1 in magnitude, with another one following at 4.0.
The quakes were a total of 21, with three of them over 3.0 in magnitude. There are currently no signs of increased volcanic activity in the area, although it has seen a large number of quakes over the past years.
Source : Icelandrewiew.
Piton de la Fournaise , La Réunion :
ALERT LEVEL: Vigilance
Extract from the press release of the prefecture:
« Order No. 1870 of 7 September 2017, which comes into force on 8 September 2017 at 8.00 am, regulates public access under the following conditions:
Access to the upper part of the Enclos remains strictly limited to the following two marked trails:
– Pas de Bellecombe – Formica Léo – Rosemont Chapel – Trail Rivals – Crater Caubet
– Pas de Bellecombe – Formica Léo – Rosemont Chapel – access trail to the Dolomieu crater observation site (access from the crater north).
The Kapor trails to Piton Kapor and from Caubet crater to the Belvedere on the Château Fort are forbidden.
The public is prohibited from engaging beyond the provisional limits that are materialized on the RIVALS trail. »
Source : OVPF.
Sheveluch , Kamchatka :
56.64 N, 161.32 E;
Elevation 10768 ft (3283 m), the dome elevation ~8200 ft (2500 m)
Aviation Color Code is ORANGE
Explosive-extrusive eruption of the volcano continues. Ash explosions up to 32,800-49,200 ft (10-15 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
Explosions sent ash up to 8 km a.s.l. at Sheveluch volcano
A growth of the lava dome continues (a viscous lava flow reveal in the northern its part), strong fumarole activity, ash explosions, hot avalanches and an incandescence of the dome blocks and hot avalanches accompany this process. According to satellite data by KVERT, a thermal anomaly over the volcano was noting on 02-03 and 06-07 September. Two explosive events occurred on 07 September: explosions sent ash up to 10 and 8 km a.s.l., ash plumes drifted to the north-east, south-east and south from the volcano.
Source : Kvert
Photo : Yu. Demyanchuk, IVS FEB RAS, KVERT , 14/5/2017