Volcanic activity in the period from 21 to 27 March 2012 Natural Disasters
During this period of seismic events occurred in 11 volcanoes, signs of a new volcanic activity appeared in five volcanoes:
IYEN (2799 m, east of. Java, Indonesia, 8,058 ° S, 114,242 ° E)
First change the chemical composition of water in the crater lake, where increased levels of CO2 and acidity. The surface temperature of the lake has increased from 28.8 to 45,1 º C, at a depth of 5 m, the temperature changed from 42.7 to 44,7 º. In March, the volcano is assigned a second level of risk on a scale of 1 to 4.
Iyen volcanic complex consists of a group of small stratovolcanoes with a 20-kilometer caldera. The high point of the complex is the volcano Gunung Merapi. To the west of it is the previously active volcano Iyen Cava, which is located in the crater of an acid lake turquoise about 1 km wide.
Iliamna (3053 m, south-west Alaska, 60,032 ° N, 153,090 ° W)
Increased activity of the volcano to the March 25-27, which increased the risk of the code to "yellow."
Stratovolcano located in the National Park Lake Clark and the north-east is covered by a glacier. Below the top of the valley littered with the remnants of avalanches and lahars. More detail here.
Nevado del Ruiz (5321 m, Colombia, 4,895 ° N, 75,322 ° W)
March 19-25, the seismic activity of the volcano has increased, the emissions of gas increased to a significant size. Gas column above the crater Arenas up to 2 km. Danger code volcano "yellow."
Pacaya (2552 m, Guatemala, 14,381 ° N, 90,601 ° W)
March 20 changed the nature of emissions and seismic activity of the volcano, causing avalanches on March 26, the emissions of gas. Earlier, in 2010 after the eruption of the fumaroles out only water vapor.
Eruption of the volcano can be seen directly from the capital of Guatemala. What happened back in 1100 phone such a powerful eruption caused an avalanche that its wreckage spread for 25 kilometers down the Pacific coastal plain is 25, which later formed a new cone of the volcano Pacaya. Over the past few decades, the volcano was observed Strombolian type activity with lava flows and erratic eruptions.
Soufriere Hills (915 m, about. Montserrat, Caribbean, 16,72 ° N, 62,18 ° W)
March 16-23, with a relatively quiet lava dome complex, there were two volcano-tectonic earthquakes with 49 and 54 episodes. Increased the activity of fumaroles, in the northeast of the dome is a new fumaroles. Cleaved at the volcano, pending from previous eruptions formed a pulsating valve, steam and ash to a height of 1.8 km. The danger of the volcano is on the second level.
Volcanoes of the continuing activity:
CLEVELAND (1730 m, about. Chuginadak, Alaska, 52,825 ° N, 169,944 ° W)
March 23 code danger volcano was downgraded to "yellow", as from March 13, there have been no new eruptions and lava dome has not increased.
KARYMSKY (1536 m, East Kamchatka Peninsula, Russia, 54,05 ° N, 159,45 ° E)
March 16-23 at the volcano continued seismic activity. Ash emissions rose to 3 km in altitude. There were signs of thermal anomalies. Because of poor visibility observation of volcanoes. Danger code is "orange."
Kilauea (1222 m, Hawaii, USA, 19,421 ° N, 155,287 ° W)
March 21-27 in the crater Galemaumau were sporadic lava lake rises, emissions and ash blowing. There has been some night glow cones in the north-east and south-east of the base of the volcano. Lava continued to flow in Pali and coastal valley.
Kizimov (2376 m, East Kamchatka Peninsula, Russia, 55,130 ° N, 160,32 ° E)
March 16-23, for the volcano was characterized by an average level of seismic activity, and companions was recorded large thermal anomaly. On the eastern slope of the continued large lava flow and hot avalanche came down. All accompanied by the release of gas and vapor. Danger level is "orange."
Puyeue (2236 m, the center of Chile, 40,590 ° S, 72,117 ° W)
March 20-27 over the volcanic ash complex did not rise above 1 km. March 23 threat level was lowered to "orange." March 23-27, crater glow was observed.
REVENTADOR (3562 m, Ecuador, 0,077 ° S, 77,656 ° W)
On March 25-26, the highest point of the observed glow of the volcano. Pole pair up to 500 m above the crater. The ash cloud was attributed to 25 km north-northwest of Reventadora. Activity of the volcano continues to fall.
Reventador is one of Ecuador's most active volcanoes in the Cordillera Real. This stratovolcano was covered by forest, overlooking the western Amazon jungle. Multiple eruptions and lava flows are visible from the capital of Ecuador, Quito. At the eastern foot of the entire valley is Revendadora formed debris timber brought by numerous lahars and tropical downpours.
Sakurajima (1117 m, about. Kyushu, Japan, 31.585 ° N, 130.657 ° E)
March 21-22 at the volcano continued eruption, ash column rose to a height of 1.8-2.7 km and were classified by the wind to the north-east and south of Sakuardzimy.
Sangay (5230 m, Ecuador, 2,002 ° S, 78,341 ° W)
March 22 column of ash above the volcano rose to 8.2 km. Other changes have been hidden in the clouds, shrouded volcano.
Isolated Sangay volcano, located in the east of the Andean chain, is the southernmost volcano in Ecuador. In the last few hundred years active volcano erupted. Volcano, towering tropical forests, about 14 thousand years. Sangeeta slopes riddled tropical downpours and canyons are up to 600 m in depth. In written sources, there is mention of an eruption in 1628, during the period from 1728 to 1916. After a short respite Sangay again woke up in 1934 and is still in effect, constantly changing the look of their crater.
SANTA MARIA (3772 m, Guatemala, 14,756 ° N, 91,552 ° W)
March 23 from a volcano could be seen scattered streams of gas and ash cloud that drifted by wind at 33 km to the south-west. Ash fallout occurred within 18 km from the volcano. March 24 ash emissions continued, were added to the stone falls and thermal anomaly. March 25-27 new eruption triggered ash emissions 800-900 m in height, lava flows caused many avalanches, and on 26 March on the western slope of the cone down to the foot of the Caliente pyroclastic flow.
Symmetrical, forest-covered Santa María volcano is part of a chain of massive stratovolcanoes rising above the Pacific coast of Guatemala. The crater was formed after kilometer width of a strong volcanic eruption in 1902 that brought the south-west of the country multiple fracture. After that, the lava dome continued to grow in 1922, accompanied by minor eruptions, lahars and pyroclastic flows.
SHIVELUCH (3283 m, the center of the Kamchatka Peninsula, Russia, 56.653 ° N, 161.360 ° E)
March 16-23, the seismic activity of the volcano continued. A flood of lava never ceased to flow out of the crater formed by the eruption 2010goda. Height of the column of ash rose to a height of 5-6 km. Companions had found a small thermal anomaly. Danger code is "orange."
Tungurahua (5023 m, Ecuador, 1,467 ° S, 78,442 ° W)
Column of ash continued to rise over the volcano at 0.5-4 km in altitude, there was a glow of the crater and the characteristic roaring sounds. Heavy rain triggered lahars March 24-25, and the flooding in areas of the Pampas, Puelo, Palitaua and Ulba. March 26 was the activity is even more marked: the ashes rose to 3 km and has been classified by wind at 8 km to the north-northeast.