October 22 , 2016. EN. Fuego , Cotopaxi , Tungurahua , Sheveluch .
October 22 , 2016.
Fuego , Guatemala :
The Fuego volcano in Guatemala has three moderate explosions.
The Fuego volcano, located 50 kilometers west of Guatemala City, recorded eight explosions, low to moderate, reported the National Coordinator for Disaster Reduction (Conrad).
These have generated a gray ash column at a height of 4700 meters above the level of the sea.
The volcano 3763 meters high is located between the departments of Escuintla, Chimaltenango and Sacatepequez. He recorded 13 eruptions this year. Besides the Pacaya (Escuintla) and Santiaguito (Quetzaltenango), the Fuego volcano is one of the most active of 32 volcanoes in Central America.
Activity: In the morning, the volcanic area is cloudy, so there is no visibility on the volcano. Low to moderate explosions were reported, emitting gray columns to a height of about 4500-4800 meters. (14.763 to 15.748 feet), which moved to the southwest and west of the volcano. The explosions were accompanied by low and moderate rumblings, sensitive 18 kilometers from the volcanic perimeter, and moderate shock waves. Moderate avalanche towards the South and the Southwest are reported. Ash fall recorded in Santa Sofia, Morelia, Panimaché I and II.
Sources : LAESTRELLA , Insivumeh .
Photo : KEVIN SEBOLD
Cotopaxi , Ecuador :
Summary of observations made during an overflight to the Cotopaxi and Tungurahua volcanoes, October 17, 2016
On 17 October this year, it was possible to carry out an overfly of active surveillance of Cotopaxi and Tungurahua volcanoes, as part of the monitoring done by the Geophysical Institute, in coordination with the Coordinator of the Ministry of Security which provided the logistics of flying with a plane of the Ecuadorian air Force (TWIN OTTER, EAF-448) from the airport of Latacunga in Cotopaxi Province, following the path of Figure 1.
The conditions under which the theft occurred were favorable because the volcano was mostly clear. During the approach, it has been observed that the crater emitted in a pulsatile manner, a column of gas ashless and with very little energy (Fig. 2).
Arriving on the volcano it was noted that there had been recent snowfall, which softened the previous topography of the glacier, but the changes that were evident at the end of 2015 were observed.
After the eruptive activity of 14 August the same year, the apparent cracks are not becoming larger and have not increased in number. On the western flank of the volcano, it could be seen that had generated a series of mudslides or landslides, caused by the melting of the glacier, produced by the change in albedo due to the elimination of deposits ashes in the wind. The slides are not at greater distances and are limited to a height of about 5200 m (Fig. 2).
Moreover, contrary to what was observed from the flight on September 3, 2015, there is no more presence of water and humidity on the fronts of the terminal tongues of the glacier, or thin down rivulets on the flanks; which may indicate that the increased melting of glaciers does not happen right now or is much lower.
Flying conditions have allowed of doing thermal images of the majority of thermal anomalies of the volcano. In general, thermal images show that the upper flanks of the volcano are at temperatures lower than those observed in the previous month. As observed during the flights of August 31 and September 3, 2015, this time it was also possible to observe in the thermal image, small abnormalities on the eastern and Southeast flanks , which showed for the hottest, a TMA at of 20, 1 ° C, which probably corresponded to a fumarole activity (fig. 3). Thermal anomalies in the flanks of the volcano were clearer on the eastern flank, with a TMA values variable between 21.6 ° C and 39.1 ° C. For the Southern flank the calculated TMA was 38.4 ° C (Fig. 3). The measurements of apparent maximum temperature (TMA) to the crater are related to the hot gases emitted from inside the volcano, the TMA measurement was at 96.6 ° C. In conclusion, it is estimated that temperatures on the volcano’s flanks decreased compared to previous months; which would have caused the increase of glacier melt. The arrival of hot fluids at the volcano surface, decreased or ceased.
Figure 3: Top row: photography and thermal imaging of the southern and eastern flanks of Cotopaxi volcano. Bottom row: Photography and thermal image of the volcano’s crater, where you can see the low gas column at the time of overflight; bright yellow areas represent a higher temperature. (Photography and Imaging: M. Almeida, P. Ramon – IG / EPN).
Source : IGEPN
Tungurahua , Ecuador :
The volcano has clearly shown its top, which enabled direct observation and thermal imagery in the crater area. No activity was observed in any of fumaroles fields.
Figure 1: The Tungurahua volcano seen from the southwest. (Photo: M. Almeida – IG / EPN).
In the analysis of thermal images, we could identify most anomalies of the volcano crater. The highest values of Maximum Apparent Temperature (TMA) are located in the inner area of the crater (TMA = 51.3 °). Fumaroles of the Southwest and Southeast edge showed TMA values of 31.9 ° C and 38.2 ° C respectively. In the fumaroles fields located on the inside edge of the highest peak north of the volcano, it was possible to calculate aTMA varying between 37.1 ° C and 22.6 ° C. All these values are essentially linked to volcanic fumaroles present in this state of activity (Fig. 2).
Figure 2: Left: inner rim of the crater seen from the Northwest of the volcano, right: thermal image showing in yellow the higher temperature zones in the crater. (Photo and picture: Mr. Almeida – IG / EPN).
Source : IGEPN
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 ft (10 km) a.s.l. could occur at any time. Ongoing activity could affect international and low-flying aircraft.
A growth of the lava dome continues (a viscous lava flow reveal in the northern its part), strong fumarole activity, ash explosions up to 7 km a.s.l., hot avalanches and an incandescence of the dome blocks and hot avalanches accompany this process. Satellite data by KVERT showed a thermal anomaly over the lava dome all week. According to video and satellite data, explosions sent ash up to 6-7 km a.s.l. and ash plumes extended for about 210 km to the east, southeast, northwest from the volcano on 14-16, 18 and 20 October.
Source : Kvert.
Photo : Yu. Demyanchuk, IVS FEB RAS, KVERT ( 20/10/2016.)