Otros volcanes en días pasados que han erupcionadohttp://www.volcano.si.edu/reports/usgs/7 April-13 April 2010
New Activity/Unrest: | Egon, Flores Island (Indonesia) | Etna, Sicily (Italy) | Eyjafjallajökull, Southern Iceland | Gaua, Banks Islands (SW Pacific) | Miyake-jima, Izu Islands (Japan) | Redoubt, Southwestern Alaska | Reventador, Ecuador
Ongoing Activity: | Arenal, Costa Rica | Batu Tara, Komba Island (Indonesia) | Dukono, Halmahera | Karymsky, Eastern Kamchatka (Russia) | Kilauea, Hawaii (USA) | Kliuchevskoi, Central Kamchatka (Russia) | Popocatépetl, México | Rabaul, New Britain | Sakura-jima, Kyushu | Shiveluch, Central Kamchatka (Russia) | Soufrière Hills, Montserrat
Eruption of Gaua Volcano April 12, 2010A thick blue haze stretched over the South Pacific archipelago of Vanuatu on the morning of April 12, 2010. The haze was volcanic fog—vog—emitted by Gaua and Ambrym Volcanoes.
Both are known for producing volcanic plumes rich in sulfur dioxide. The sulfur dioxide gas emitted by the volcanoes reacts with moisture in the air to create small droplets (called aerosols) of sulfuric acid, which scatters blue light, coloring the plume. Although it is unclear which volcano is emitting more aerosols, the Wellington Volcanic Ash Advisory Center (VAAC) has reported daily ash plumes from Gaua since April 8th.
An overview image, top, shows the plume extending for thousands of kilometers to the northwest (upper left) and southeast (lower right) of the islands. The plume appears thicker and bluer in the corner of the image because the satellite is viewing the plume at an angle. The bottom image shows a higher-resolution view of the two volcanoes. This image was acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Terra satellite.
Lava and Snow on Klyuchevskaya VolcanoKlyuchevskaya Volcano continues to erupt. A thin, translucent plume of ash and steam stretched above the snow covered Kamchatkan Peninsula roughly 90 kilometers (60 miles) north-northeast of the volcano on April 7, 2010. The Tokyo Volcanic Ash Advisory Center reported a plume at 17,000 feet (5,200 meters), less than 1,200 feet (370 meters) above the 15,863-foot (4,835-meter) summit. Shiveluch Volcano, also active but showing no signs of life save for pale brown ash deposits on the lower slopes, is to the northeast of Klyuchevskaya.
This natural-color satellite image was collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard Terra on April 7, 2010.
Four Erupting Kamchatka VolcanoesThe Kamchatka Peninsula is one of the most volcanically active regions on Earth. Located in Russia’s Far East region, the peninsula forms the northwestern edge of the Pacific Ring of Fire. At least 114 Kamchatkan volcanoes have erupted in the past 12,000 years. According to the Kamchatka Volcanic Eruption Response Team (KVERT) 4 of these volcanoes—Shiveluch, Klyuchevskaya,
Bezymianny, and Karymsky—are erupting currently.
This natural-color satellite image shows the 4 active volcanoes on April 2, 2010. Gray and brown ash covers the white snow near Shiveluch, Klyuchevskaya, and Karymsky. The Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA’s Terra satellite acquired the image.
Minchinmavida and Chaitén Volcanoes, Chilemiércoles, 17 de marzo de 2010
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