Review of volcanic activity from 28 March to 3 April 2012

During this period of seismic events occurred in 15 volcanoes, signs of a new volcanic activity appeared in seven volcanoes:

CLEVELAND (1730 m, about. Chuginadak, Alaska, 52,825 ° N, 169,944 ° W)

March 28 code danger volcano was raised to "orange", as in the crater formed a new lava dome. Made April 4 satellite image displayed the temperature increase due to activation of the surface of the volcano lava.

Fuego (3763 m, Guatemala, 14,473 ° N, 90,880 ° W)

During this period, active volcano spewed ash column to a height of 500-800 m above the crater. Lava fountains rose to 100-150 over Fuego and trickled down, causing an avalanche. The ash cloud was attributed wind at 13 km west-southwest of the volcano. Fuego has a strong thermal anomaly.

The volcano is one of the most active in Central America and the trio of stratovolcanoes along with Meseta and Akatenango surrounding the former capital of Guatemala, the city of Antigua. Fuego formation occurred in the Holocene. The first mention of the eruptions are in 1524 and owned by the Spaniards began to conquer Central America. In our time, the most serious eruption include events in 1974, when the volcano spectacular gush pyroclastic flows, which could see people of Antigua.

Iliamna (3053 m, south-west Alaska, 60,032 ° N, 153,090 ° W)

Iliamna remains moderately calm. Danger code for the volcano remains "yellow."

LEVOTOBI (1703 m, the island of Flores, Indonesia, 8,542 ° S, 122,775 ° E)

First observed at the volcano burst of activity, and later there was some decline. In January-March 2012 were recorded over Levotobi white clouds of ash have risen above the crater of 15 meters on a 4-point scale, the level of danger is one.

The twin volcanoes Levotobi (or "husband and wife") are located in the eastern part of the island of Flores are stratovolcanoes. Volcanic peaks separated only 2 km. Conical Levotobi Lakilaki (1584 m) is often erupted in 19-20 centuries, the higher (1703 m) and has a wide Levotobi Perempuan counts only two eruptions. In the 20th century both volcanoes was pronounced growth of the lava dome in the crater open to the north.

Nevado del Ruiz (5321 m, Colombia, 4,895 ° N, 75,322 ° W)

Volcano significantly intensified in the period from 24 to 31 March. Constant earthquake provoked multiple fractures rock in the crater of Arenas. On the morning of March 29 there were more than 135 earthquakes in 25 minutes. Depth of earthquakes south of the crater is 4 km. On April 1-3, the depth of earthquakes decreased to 0.5-3 km. Rose to the level of danger of the "orange".

Soufriere Hills (915 m, about. Montserrat, Caribbean, 16,72 ° N, 62,18 ° W)

Active lava dome was insignificant, and on March 23 had never happened emissions of ash and smoke. SO2 emission was 1320 tonnes per day (minimum is 264 tons, up 4,594 tons). Over the last decade, it is the third-highest. March 24-26, emissions peaked in 2550 tonnes. The danger is on the second level.

Sandor (3136 m, the center of. Java Idoneziya, 7,30 ° S, 109,992 ° E)

In January, increased activity of the volcano, has been elevated risk code from 1 to Level 2. However, later, the seismic performance decline, reduced the number of daily earthquakes. After March 30, the risk Sandor was again reduced to the first level.

The most symmetrical volcano on. Java, Gunung Sandor is in the north-western and southern slopes of the many craters and cones filled with boiling lava. At the top is the crater lava cone and a few smoky valves on the fault line of the dome. Lava flows continuously from the crater in all directions to a distance of 13 km down the slopes. Sandor modern eruptions were a phreatic explosions of medium strength of the central crater. Side craters were used in 1882 and 1903.

Volcanoes of the continuing activity:

ETNA (3330 m, about. Sicily, Italy, 37,734 ° N, 15,004 ° E)

After a two-week lull reported 23rd paroxysmal episode from January 2011, which occurred April 1, 2012 at the new southeast crater of Etna. High lava fountains, pillars of gas and tephra erupted at the Valley of Beauvais from the main and side craters. Phase shudder lasted about 1.5 hours. Ash began to settle on the south-east of the volcano mainly between Monterosso and Zafferano Etnea and below.

KARYMSKY (1536 m, East Kamchatka Peninsula, Russia, 54,05 ° N, 159,45 ° E)

March 23-30 at the volcano continued fixation of seismic activity. The ash cloud rose up to 2.5 km. The volcano has a daily thermal anomaly. Danger code is "orange."

Kilauea (1222 m, Hawaii, USA, 19,421 ° N, 155,287 ° W)

From March 28 to April 3, regularly saw the rise of the lava lake in the crater Galema-mind-y. from neighboring valve constant output portion of gas and ash. In a small depression in the north-eastern and south-eastern outskirts of the crater Pu-u-of-the-hot rock and there was light. Lava continued to flow down the fell to the coastal plain is 1.6 km from the coast.

Popocatepetl (5426 m, Mexico, 19,023 ° N, 98,622 ° W)

March 27-April 3 above the volcano could see clouds of steam and gas containing ash. At night, clearly visible crater glow Popocatepetl.

Puyeue (2236 m, the center of Chile, 40,590 ° S, 72,117 ° W)

According to data from observations of the rift zone Cordon-Kaulle, emissions rose above the crater of the volcano is not greater than 1.2 km. Every night recorded glow hot rock. Danger code is "orange."

SHIVELUCH (3283 m, the center of the Kamchatka Peninsula, Russia, 56.653 ° N, 161.360 ° E)

The explosions at the volcano continued during c23 to 30 March. A flood of lava continued to pour out of the crater formed after the eruption of 2010. 25-26 and 28 March ash column reached a height of 7 km. The satellite images show a weak thermal anomaly daily. Ash drifted by wind at 192 km east and southeast of Shiveluch. Danger code is "orange."

Tenger-CALDERA (Bromine) (2329 m, east of. Java, Indonesia, 7,942 ° S, 112,95 ° E)

In view of the fact that from January 1 to March 29, significantly decreased the activity of the cone of bromine (white ash rose by only 50 m in height), the level of risk was down to one.

Caldera Tenger width of 16 km is located on the northern outskirts of the volcanic massif coming from Semeru volcano in the east of. Java. The complex consists of five covering one single stratovolcanoes with large calderas formed in the Pleistocene and Holocene. New cones were formed thousands of years ago. This includes the most visited and most young Cone Bromo. He is also the most active in the complex. From 1804 to Bromo were more than 50 volcanic explosion in medium strength.

Tungurahua (5023 m, Ecuador, 1,467 ° S, 78,442 ° W)

March 28-April 3 due to poor visibility review volcano was difficult. April 1 of the Tungurahua cloud of ash to 800 m in height, the loss occurred in otorgo Pillate (7 km to the west), Choglontuse (13 km to the west-south-west) and Molitonese (West). Reported lahars in the lowlands and Pingullo Achupashal (north-west). The region temporarily blocked roads.


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