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Tópico em 'Sismologia e Vulcanismo' iniciado por luismeteo3 7 Jan 2018 às 15:22.
Ashes from a Russian Volcano Reached the Stratosphere (Video)
Society » ENVIRONMENT | January 10, 2018, Wednesday
The Shiveluch Volcano of Kamchatka has ejected a pylon of ash 11 kilometers above sea level, TASS reportedly referring to Russian vulcanologists. The announcement is made by scientists from the Kamchatka Volcanic Eruption Response Group of the Institute of Volcanology and Seismic Activity of the Far Eastern Department of the Russian Academy of Sciences.
Disposal took place on Wednesday morning. The height of the volcano itself is 3283 m. The ash has spread to the northeast at a distance of 32 km.
There are no populated areas, but for aviation in the area is marked with red code. Scientists say eruptions at a height of 10 or more kilometers can happen at any moment.
Besides Shiveluch, Klucevski shows increased activity of the volcanic peninsula. The giant volcano, since January 1, has cast dozens of pylons of steam and gases containing ash.
Shiveluch is the northernmost of the active volcanoes in Kamchatka and one of the largest in its territory. Its eruptions continue with short lulling periods since 2010. There is a steady increase in the lava dome, steam and gas, and avalanches of melted stones.
The stratosphere of the Earth is one of the uppermost layers of the planet's air coat. It starts at about 11 km above sea level.
Kadovar Declared High Risk Zone - EMTV Online
Geological Disaster Report January 11, 2018 (06:00 AM)
Today, Thursday, January 11, 2018, Geological Disasters that occur as follows:
G. Agung (Bali):
Based on the results of visual and instrumental data analysis and considering the potential danger threats, then on 27 November 2017 at 06.00 WITA status G. Agung raised from Level III (Standby) to Level IV (Awas). From yesterday to today visually volcano is generally covered with fog. Blowing white-gray medium-light intensity weak pressure reaches a height of about 500 m above the peak leaning toward the East. At night the light from the peak of G. Agung is not observed. The seismograph record of January 10, 2018 was recorded:
1 time Volcanic Earthquake (VA)
5 times Shallow Volcanic Earthquake (VB)
1 time Low-Frequency Earthquake (LF)
28 times Earthquake Blowing
Nihil Remote Tectonic Earthquake (TL)
Continuous tremor with amplitude 1-4 mm (dominant 1 mm).
The date of January 11, 2018 (00:00 - 06:00 pm) recorded:
1 time Volcanic Earthquake (VA)
1 time Shallow Volcanic Earthquake (VA)
Nihil The Local Tectonic Earthquake (TL)
5 times Earthquake Blowing
Continuous tremor with amplitude 1-2 mm (dominant 1 mm)
Communities around G. Agung and climbers / visitors / tourists not to be on, do not climb and do not do any activity in the Dangerous Zone Zone within the area of G. Agung crater and in all areas within a 6 km radius of G. Agung crater
Estimated Zone Dangers are dynamic and continually evaluated and can be changed at any time following the most recent / recent G. Supreme observational data.
VONA: Last sent ORANGE color code, published on 08 January 2018 At 23:43 WITA, the eruption of volcanic ash maximum reaches ash height 5142 m above sea level or about 2000 m from the peak. The ash column is leaning towards the East and East.
Indonesia's Active Mount Agung Volcano Imaged by NASA Spacecraft
After a new small eruption sent an ash cloud 1.24 miles (2 kilometers) into the sky on Dec. 7, 2017, Indonesia's Mount Agung volcano quieted down. This image was acquired Dec. 8 after the latest activity by the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) instrument on NASA's Terra satellite. The image shows vegetation in red colors. The summit crater has a hot spot (yellow) as detected by ASTER's thermal infrared channels. More than 65,00 residents continue to be evacuated from the volcano's danger zone in case of a major eruption. The image covers an area of 11 by 12.3 miles (17.8 by 19.8 kilometers), and is located at 8.3 degrees south, 115.5 degrees east.
Stromboli volcano (Eolian Islands, Italy): very loud and bright explosion reported from last night
Friday Jan 12, 2018 08:56 AM | BY: T
Example of a strong strombolian eruption at Stromboli from this morning (image: INGV Catania thermal webcam from 400 m Sciara viewpoint)
A very strong explosion seems to have occurred last night around 21:00 local time, friends of ours who are currently on the island reported. Thomas H. who at the time was in a house near the port (east side of island) wrote:
"Last night, around 9pm, a very large detonation occurred at the mountain and the night sky was bright as day, even the window facing the sea towards the east was lit up... my girlfriend believed to hear rumblings from falling rocks, while I suspected this to be rather the sound of strong rain."
(Original in German: "Gestern Abend um 9 hats hier einen gewaltigen Donnerschlag am Berg gegeben und die Nacht war hell erleuchtet. ..sogar das Fenster zum Meer war taghell. Meine Freundin glaubte, polterndes Geröll gehört zu haben (auf der Ostseite !), ich ging eher von starkem Regen aus.")
No trace of such an eruption could be found on the available webcam images in the archive (which are only 3 minutes apart and have probably missed the event), except that they indeed show that rather strong eruptions continue to occur.
A few days ago, Thomas reported that strombolian activity from multiple vents continues to be very intense, with explosions every few minutes, including often large ones sending bombs to 2-300 m height.
Sulphur Dioxide Observed On Kadovar
08:00 AM - There Is Now A Significant Sulphur Dioxide Gas Being Observed On Kadovar.
January 12, 2018
There is now a significant Sulphur Dioxide gas being observed on Kadovar.
Visual observations from a Rabaul Volcano Observatory (RVO) observer on a boat, indicates the whole island is still receiving significant ash fall.
In a situational update from RVO say the fracture running down the summit dome to the coast has apparently widened, with vigorous steaming occurring from it.
While there is currently no ground based monitoring, it is anticipated that seismometers will be deployed by Sunday.
RVO said that the evacuated population currently on Ruprup Island is to be moved to the mainland, due both the risk from eruption and the logistics of supplying them.
Evacuation in Philippines after volcano spews ash 2.5km into air
6:28pm 13th January 2018
(Updated 8:45pm 13th January 2018)
People in the Philippines have been forced from their homes after an active volcano spewed ash thousands of meters into the air.
The "steam-driven eruption" at Mayon volcano in Albay province started around 5pm local time on Saturday.
The Philippine Institute of Volcanology and Seismology (Phivolcs) recorded an ash column 2,500 metres high.
Provincial disaster officials ordered the immediate evacuation of villages at the foot of Mayon due to the expected ashfall.
The lowest level one alert has been issued, meaning people are not allowed to stay within a six-kilometre "permanent danger zone", Phivolcs said.
Evacuees have been given shelter in local schools.
Officials said residents should protect against inhaling the ash, advising them to wear masks or cover their noses and mouths with wet clothes.
People living outside the danger zone but on the slopes of the volcano were warned to take precautions against potential roof collapses due to the weight of ash and rainfall.
Mayon last erupted in 2014.
It killed 1,200 people in February 1841 when lava flows buried a town.
Mais de nove mil pessoas retiradas devido a erupção de vulcão nas Filipinas
HÁ 2 HORAS
Mais de nove mil pessoas foram retiradas da área envolvente do vulcão mais ativo das Filipinas, à medida que a lava começou a sair. Já esta manhã a lava percorreu meio quilómetro.
Mais de nove mil pessoas foram esta segunda-feira retiradas da área em redor do vulcão mais ativo das Filipinas, à medida que a lava começou a sair da cratera, indicaram as autoridades da ilha de Luzon.
O Instituto de Sismologia e Vulcanologia das Filipinas (Phivolcs) aumentou, no domingo, o nível de alerta no monte Mayon para três, numa escala de cinco, o que indica um aumento da possibilidade de uma erupção perigosa. Renato Solidum, responsável daquele instituto, indicou que a lava percorreu cerca de meio quilómetro, já esta manhã, na encosta do monte, levando à formação de nuvens de cinza.
Pedras incandescentes e a lava na cratera do Mayon iluminaram o céu no domingo à noite, apesar das espessas nuvens, levando milhares de residentes a procurar abrigos. O Mayon, na província de Albay, no nordeste do arquipélago, registou cerca de 50 erupções nos últimos 500 anos.
Mais de 12 mil pessoas receberam ordens para retirar de uma zona de sete quilómetros em redor do vulcão e as autoridades advertiram a população contra as torrentes de lava e nuvens tóxicas. “É perigoso para as famílias ficarem no perímetro e inalar fumos”, declarou Claudio Yucot, responsável do gabinete regional de proteção civil.
Na última erupção do Mayon, em 2014, 63 mil pessoas foram retiradas da zona. Solidum acrescentou que neste momento “a lava está mais fluída do que em 2014, o que significa que a torrente pode descer mais e com mais rapidez“.
“Vemos semelhanças com as erupções que começam com torrentes de lava e evoluem para uma fase explosiva. É isso que vigiamos e por isso queremos proteger as populações”, sublinhou.