Volcanic activity in the period from 4 to 10 April 2012 This is interesting
During this period of seismic events occurred in 13 volcanoes, signs of a new volcanic activity appeared in four volcanoes:
CLEVELAND (1730 m, about. Chuginadak, Alaska, 52,825 ° N, 169,944 ° W)
April 4 seismic stations and infrasound sensors recorded a small eruption of Cleveland. Due to bad weather conditions, explosive cloud to be seen. The next day at the volcano was observed thermal anomaly and the destruction of the lava dome with a diameter of 70 m from July 2011 this is the third dome of the volcano, which was broken during the eruptions.
April 6 in the evening followed by a series of two small eruptions that warmed the temperature of the surface of the volcano. In the climb to a height of 3 km cloud of ash concentration was negligible.
Fuego (3763 m, Guatemala, 14,473 ° N, 90,880 ° W)
April 9-10, above the volcano rose post-eruptive column of ash 100-900 m altitude, they drifted by wind at 10-15 km from the volcano. The shock wave from the explosion was felt at a distance of 8 km from Fuego. Observed avalanches from the slopes of the volcano.
Nevado del Ruiz (5321 m, Colombia, 4,895 ° N, 75,322 ° W)
April 4-10 seismic activity of the volcano was unstable, but reached a high enough. The concentration of SO2 has not diminished, and in some cities, for example, in Manizales, 25 km north-west of the Nevado del Ruiz, residents reported a characteristic odor in the air. April 5 was below the crater Arenas volcano-tectonic earthquake measuring 2.8 points. Depth of 1 km. Since February 2012 is the strongest earthquake that caused the volcano. April 4-6 at his peak was visible gas-vapor cloud that April 7 rose to a height of 3 km, and the 10th remained at 1.5 above the crater. Danger code volcano is "orange."
Soufriere Hills (915 m, about. Montserrat, Caribbean, 16,72 ° N, 62,18 ° W)
From March 30 to April 6, the activity of the lava dome remained small, March 23, there were no single episode of emission of ashes. On average, this week the volcano was producing about 529 tons per day, the lowest figure of 200 tons, the maximum 1033 tons. When viewed from the Soufriere Hills helicopter on the west side of the crater floor was found the new valve width of 30-50 m threat level remains at 2.
Volcanoes of the continuing activity:
KARYMSKY (1536 m, East Kamchatka Peninsula, Russia, 54,05 ° N, 159,45 ° E)
From March 30 to April 6, the volcano remained active. Ash column above it rose to a height of 2.5 km, confirmed data on the thermal anomaly. Aviation Hazard Code is "orange."
Kilauea (1222 m, Hawaii, USA, 19,421 ° N, 155,287 ° W)
April 4-10 circulating lava lake rose and sank in the tank crater Halema-mind-y. The gas cloud above the volcano remained decent ash content. A small depression in the east of the volcano and the cone on the south-east crater floor heating celebrated rock and glow. Lava flows continue to move on and fell along the coastal plain, while remaining at a distance of 1.6 km from the coast. April 6-9 from the crater Pu-u-Oh began to emerge a fresh lava flow width almost equal to the crater itself.
Pagano (570 m, Mariana Islands, 18,13 ° N, 145,80 ° E)
From March 30 to April 6, over the volcano were seen small gas-and-steam cloud. One of the pilots, inspect the volcano on April 7, states that there was a suspension of the cloud of ash which has risen to the height of 1.5 km. Aviation Code danger remains "yellow" ..
Pagan Island is the largest of the Mariana Islands, and placed it on two stratovolcanoes connected by an isthmus — among the most active. Both volcanoes lie within the caldera 7 and 4 km in diameter, which had been formed in the early Holocene. North Pagan is 570 meters in height, the South Pagani (548 m) elongated top with four clearly defined craters. Almost all known eruptions related to the 17th century, can be written on the account of the Northern Pagan. The most violent eruption dates back to 1981, then had to evacuate a small population of the island.
Puyeue (2236 m, the center of Chile, 40,590 ° S, 72,117 ° W)
April 9-10, according to data from the satellite over the rift zone Cordon-Kaulle rose to a height of 450 small ash cloud. There is evidence of heat and glow of the crater. Danger code Puyeue is "orange."
RANAKAN (2350, the island of Flores, Indonesia, 8,62 ° S, 120,52 ° E; summit elev. 2,350 m
Above the lava dome Anak Ranakan from January to April 2012 white clouds rose by only 10-15 m Seismic activity of the volcano has receded considerably. April 9 danger level was lowered to 1 to 4 ballnoy scale.
New lava dome Anak Ranakan established in 1987, where earlier eruptions happened. In the west of. Flores west of this dome has a few more. For example, the lava dome Mandosava Pocock took a position at an altitude of 2350 m, at the top of the island, just west of the existing dome.
SANTA MARIA (3772 m, Guatemala, 14,756 ° N, 91,552 ° W)
April 7 of the ash cloud from a variety of explosions have been attributed to a distance of 37 wind in the south-west and 11 km to the south. April 8-10, after the explosions in the crater of Caliente in the air to a height of 600-900 meters up the new ash cloud. Lava flows have continued to cause an avalanche coming down the slopes of the Santa Maria.
SHIVELUCH (3283 m, the center of the Kamchatka Peninsula, Russia, 56.653 ° N, 161.360 ° E)
The explosive activity of the volcano has remained unchanged for 29 March to 6 April. A powerful stream of lava continued to pour out of the crater, formed in 2010. Ash rose to a height of 4 km above Shiveluch. On seismic performance ash can still climb up to 6.6 km. March 29-31 and April 3 in satellite images could be seen a small thermal anomaly of the lava dome. Aviation Hazard Code is "orange."
Tambor (2850 m, about. Sumbawa, Indonesia, 8,25 ° S, 118,00 ° E)
From January to April over the volcano were not recorded new ash cloud in the caldera is not much change has occurred, the overall seismic activity has decreased. Therefore, April 9 danger level was lowered to 1 to 4 ballnoy scale.
Tambor is a large stratovolcano Sanggar entire peninsula (60 km wide) in the north of. Sumbawa. Before the formation of the caldera about 43,000 years ago, the volcano had a height of 4000 m in the late Pleistocene, extensive lava flows filled the young caldera, and then in the early Holocene volcano actively erupting. In the history of the eruption observed in April 1815, when the pyroclastic flows reached the sea and flew in all directions from Tambora. Violent eruption of tephra (150 km3) destroyed all the fertile land and caused 60,000 deaths. Then, from the current caldera formed tephra 6 km wide and 1250 m deep. In the 19th and 20th centuries, the volcano continued to emit lava flows from the bottom of the caldera.
Tungurahua (5023 m, Ecuador, 1,467 ° S, 78,442 ° W)
April 4-8, the volcano was hidden from observation of clouds. April 9-10, a column of ash and steam rose to a height of 2-3 km above the crater. In the vicinity of the volcano could be heard rumbling of explosions. In Kapila, Paliktaua and Los Toktes ash fell on April 9. The western flank of Tungurahua lahars descended down, which led to the closure of the road from Baños to Penipe.