March 17, 2016. EN. Fuego , Nevado Del Ruiz , Suwanose-jima , Chaparrastique .

Home / blog georges Vitton / March 17, 2016. EN. Fuego , Nevado Del Ruiz , Suwanose-jima , Chaparrastique .

March 17, 2016. EN. Fuego , Nevado Del Ruiz , Suwanose-jima , Chaparrastique .

March 17, 2016.

 

Fuego, Guatemala :

4.473°N, 90.88°W
Elevation 3763 m

On 10 March INSIVUMEH reported a new phase of activity at Fuego characterized by Vulcanian explosions, and ash plumes that rose 650 m and drifted E. Strong shock waves and rumbling sounds were detected 10 km away. During 10-11 March explosions generated ash plumes that rose 650-950 m and drifted E and NE.

 

fuego

Incandescent material was ejected as high as 200 m and caused avalanches in the Trinidad (S) and Taniluyá (SW) drainages. Cloud cover prevented visual observations during 12-13 March; shock waves were detected. During 14-15 March explosions produced ash plumes that rose 450-750 m and drifted 8-10 km SW, W, and NW. Incandescent material was ejected as high as 150 m.

Source : Insivumeh,Gvp.

Photo : Marlon Ardon

 

 

Nevado Del Ruiz , Colombia :

Weekly activity report of the Nevado del Ruiz volcano, from 8 to 14 March 2016.

The level of activity continues at:
Activity level Yellow  or (III): changes in the behavior of volcanic activity.

Regarding the monitoring of the activity of the Nevado del Ruiz, the SERVICIO Geologico COLOMBIANO reports:

During the last week, the volcanic system continued to show unstable behavior. The recorded seismic activity was mainly associated with fluid dynamics in volcanic conduits, which was characterized by the occurrence of earthquakes long period (LP), short pulses of volcanic tremor and continuous tremor episodes with different energy levels.Some of these signs have been associated with the emission of ash process, sometimes confirmed by the images captured by the cameras installed in the Volcano area and reports of the Colombian Geological Service officials and the National Park Of Los Nevados (NNNP) . This seismic activity was localized mainly near the Arenas crater in the southern , southeast and northwest sectors of the volcano. Do not rule out new episodes of these signals with higher energy levels and ash emissions in the atmosphere as at other times during the past 15 months may arise. The ashes can be dispersed according to the wind conditions prevailing in the region. The above activity has been accompanied by thermal anomalies near the Arenas crater.

 

nevado del ruiz

Seismic activity related to the fracturing of rocks in the volcanic structure was important, especially for 12 and 13 March, with an increase in seismic activity in the Northwest area of ​​the volcanic structure. The occurrence of a seismic event of magnitude 3.0 ML (local) on March 12 at 2:33 (local time), located in the northwest sector compared to the Arenas crater at a depth of 5.6 km was recorded, reported as felt by staff of NNNP in Brisas area. In addition, two other earthquakes, reported as felt in the same area on March 12 at 5:08 (local time) with a magnitude of 2.3 ML (local scale) and March 13 at 20:31 (local time), to magnitude 2.8 ML (local scale), located in the northwest and northeast of the Arenas crater, at 5.6 and 3.6 km depth, respectively , were recorded. Other active seismic sources during the week were the South East , North, Northeast zones and the Arenas crater himself, at depths ranging between 0.67 and 7.72 kilometers.

The volcanic deformation measured from electronic inclinometers, global navigation satellite systems (GNSS) and satellite images, which record changes in the tilt, the position and shape of the volcano (respectively) during the last assessment period continues to show recorded changes.

Nevado-del-Ruiz

 

The volcano continues to emit into the atmosphere large amounts of steam and water gas, including sulfur dioxide (SO2), as it was felt by the permanent stations SCANDOAS installed in the Volcano area and satellite imagery.

The column of gas, steam and ash reached a height of 1,800 meters above the volcano’s summit on March 8. The direction of the dispersion of the column was in line with the prevailing wind in the area, which during the week showed a predominant direction towards the south – east over the volcano.

The Nevado del Ruiz shows clear evidence that the volcanic system is unstable and continues to evolve. New events that may indicate an acceleration of the process, involving greater instability of it and consequently changes in the level of activity is not excluded. While the instability of the volcano smoldering for more than five years, it is essential not to used to a seemingly monotonous behavior of the volcano and be attentive to official information to be published by the Colombian Geological Service.

Source : SGC

Photos : SGC ( archives)

 

 

Suwanose-jima , Ryukyu Islands , Japan :

 

29.638°N, 129.714°E
Elevation 796 m

Based on JMA notices and satellite-image analyses, the Tokyo VAAC reported that on 11 March an explosion at Suwanosejima generated a plume that rose to an altitude of 1.5 km (5,000 ft) a.s.l. and drifted SE.

 

Suwanose-jima - le 5 novembre 2009 - phot N. Geshi / Geological Survey of Japan

 

The 8-km-long, spindle-shaped island of Suwanosejima in the northern Ryukyu Islands consists of an andesitic stratovolcano with two historically active summit craters. The summit of the volcano is truncated by a large breached crater extending to the sea on the east flank that was formed by edifice collapse. Suwanosejima, one of Japan’s most frequently active volcanoes, was in a state of intermittent strombolian activity from Otake, the NE summit crater, that began in 1949 and lasted until 1996, after which periods of inactivity lengthened.

 

 suwanose-jima

The largest historical eruption took place in 1813-14, when thick scoria deposits blanketed residential areas, and the SW crater produced two lava flows that reached the western coast. At the end of the eruption the summit of Otake collapsed forming a large debris avalanche and creating the horseshoe-shaped Sakuchi caldera, which extends to the eastern coast. The island remained uninhabited for about 70 years after the 1813-1814 eruption. Lava flows reached the eastern coast of the island in 1884. Only about 50 people live on the island.

Source: Agence météorologique japonaise (JMA)

Photo : N. Geshi / Geological Survey of Japan , H.Seo / Geological Survey of Japan

 

 

San Miguel ( Chaparrastique ) , El Salvador :

The volcano has vibration fluctuations with a decreasing trend
Wednesday, 16 March 2016 10:09

From Monday, March 14 at 7:00 to the time of issuance of this report, the seismic vibrations of the Chaparrastique volcano continues to show fluctuations with a declining trend. In the last 24 hours, the vibration has fluctuated between 127 and 198 units RSAM / hour, with an average of 156 units, the maximum threshold of normal behavior RSAM per hour is on average of 150 units

 

chaparrastique

Surveillance cameras show that the top of the volcano is still very cloudy, it does not allow to observe the crater. Meanwhile, the network of local observers did not report anomalies in the region.

MARN continues its enhanced surveillance of the volcano, maintains close communication with the General Directorate of Civil Protection and local observers.
MARN invites journalists and people not to approach the summit of the volcano, because of the degree of danger it poses.

 

Source : Marn.

Recommended Posts

Leave a Comment

Nous contacter

Nous ne sommes pas disponibles pour le moment. Mais vous pouvez nous envoyer un email a l'aide du formulaire ci-dessous.

Not readable? Change text. captcha txt

Start typing and press Enter to search