Volcanic activity worldwide 8 Aug 2015: Shiveluch volcano, Raung, Aso, Nevado del Ruiz, Sabancaya, M...
Samstag Aug 08, 2015 17:07 |
Diffuse ash plume drifting from Shiveluch yesterday morning
Ash venting from Aso volcano (Nakadake crater)
Nishinoshima on 24 July - note the path of the lava tube (line) and the active delta on the eastern coast (lower right)
Ash plume from Raung this morning (photo: L.K.Adam / Twitter)
Ash emission from Ruiz on Thursday morning
Shiveluch (Kamchatka): A moderately sized eruption occurred Thursday evening and produced an ash plume that rose to approx. 18,000 ft (5.4 km) altitude. Minor, near continuous ash venting has been intermittently visible on webcam imagery since.
Ash plume from Sabancaya volcano yesterday
Aso (Kyushu): The eruption from Aso volcano's Nakadake crater continues. During the past day, several phases of ash emissions occurred. At night, incandescence can be seen at the vent.
The activity is not typical strombolian with discrete explosions, but rather continuous phases of jet-like venting of ash. Its cause is probably phreatomagmatic - the release of hot ash and gas as water and magma interact at depth.
Nishino-shima (Volcano Islands, Japan): The volcano on the island continues to erupt lava flows that continue to gradually enlarge the island.
The latest survey by the Japanese coast guard shows that lava flows have been traveling mostly through a tube system towards the east, where active flows continue to add land to the coast.
Manam (Papua New Guinea): Ash emissions yesterday and today produced a plume that rose to estimated 21,000 t (6.5 km) and drifted SSW. (VAAC Darwin)
Raung (East Java): Intense ash emissions continue to produce a plume that stretches hundreds of kilometers to the SW. Many flights to and from Bali were canceled or delayed today again.
The detected heat emission, based on satellite data from NASA's MODIS sensor, remains elevated, although it has decreased significantly during the past days.
Nevado del Ruiz (Colombia): Sporadic ash emissions continue to occur from time to time at the volcano. A tremor episode on 6 August that started at 08:39 local time and lasted a few minutes was accompanied by the expulsion of ash that rose approx. 700 m.
Light ash fall occurred in Manizales, Villamaria, Cinchina, Santa Rosa and Pereira.
Sabancaya (Peru): The volcano remains restless. A diffuse plume with light ash content is rising most of the time from the summit crater.
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Piton de la Fournaise (La Réunion): A new eruption might be under way at the volcano. Since last weekend, seismic activity from a source at 1-2 km depth beneath Dolomieu crater has been increasing. In addition, increased degassing and inflation of the Dolomieu crater have been detected, both likely signs of a new magma intrusion at shallow depth. ... [mehr]