lserpa
Cumulonimbus
Mount Sinabung, Sumatra.
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Actividade Vulcânica 2017
- Thread starter luismeteo3
- Data de início
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- Estado
Yesterday's earthquake in Bárðarbunga was largest since end of 2014-15 eruption
BY STAFF |AUG 3 2017
Yesterday's 4.5 magnitude earthquake in the Bárðarbunga system was the largest quake since the end of the 2014-15 Holuhraun eruption, the last eruption in Bárðarbunga. Scientists keep a close eye on Bárðarbunga, as the system has historically erupted in drawn out episodes lasting several years, with alternating eruptions and periods of intense seismic activity.
The last eruption in the Bárðarbunga system, which is one of Europe's largest volcanic systems, took place in 2014-15. The Holuhraun eruption took place in the northern part of the system, north of the main caldera of Bárðarbunga, which is located beneath the NW edge of Vatnajökull glacier. The intense seismic activity which has characterized the system since the end of the Holuhraun eruption is caused by the re-filling of the magma chambers of the volcano.
Yesterday's quake, a 4.5 magnitude quake to the north-west of the caldera, close to the edge of the Holuhraun lava field, preceded by a 3.8 magnitude quake in the NE edge of the caldera, was the largest quake detected in the system since the end of the Holuhraun eruption. A seismologist with the Icelandic Meteorological Office told the Icelandic National Broadcasting Service that there were no signs of immediate volcanic activity in the region.
http://icelandmag.visir.is/article/...-bardarbunga-was-largest-end-2014-15-eruption
BY STAFF |AUG 3 2017
Yesterday's 4.5 magnitude earthquake in the Bárðarbunga system was the largest quake since the end of the 2014-15 Holuhraun eruption, the last eruption in Bárðarbunga. Scientists keep a close eye on Bárðarbunga, as the system has historically erupted in drawn out episodes lasting several years, with alternating eruptions and periods of intense seismic activity.
The last eruption in the Bárðarbunga system, which is one of Europe's largest volcanic systems, took place in 2014-15. The Holuhraun eruption took place in the northern part of the system, north of the main caldera of Bárðarbunga, which is located beneath the NW edge of Vatnajökull glacier. The intense seismic activity which has characterized the system since the end of the Holuhraun eruption is caused by the re-filling of the magma chambers of the volcano.
Yesterday's quake, a 4.5 magnitude quake to the north-west of the caldera, close to the edge of the Holuhraun lava field, preceded by a 3.8 magnitude quake in the NE edge of the caldera, was the largest quake detected in the system since the end of the Holuhraun eruption. A seismologist with the Icelandic Meteorological Office told the Icelandic National Broadcasting Service that there were no signs of immediate volcanic activity in the region.
http://icelandmag.visir.is/article/...-bardarbunga-was-largest-end-2014-15-eruption
O que está a acontecer no sul da Itália é preocupante, porque segundo os geólogos italianos está relacionado com o aumento de actividade no supervulcão Campi Flegrei. Pelo que li as casas podem cair mesmo sem sismos por fenómenos de liquidificação do solo.
Gregor Peter@L0gg0l 11 hHá 11 horas
Em resposta a @L0gg0l @naenzo
Quake has been upgraded to M.4.4
Gregor Peter@L0gg0l 11 hHá 11 horas- Em resposta a @L0gg0l @naenzo
Increased activity has been observed there in recent months. Italian geologist: "Campi Flegrei is in a critical state,"
Gregor Peter@L0gg0l 11 hHá 11 horas - Em resposta a @L0gg0l @naenzo
The quake happened inside the Campi Flegrei volcanic field which is called Europe's supervolcano.
Dias Miguel
Cumulonimbus
Pensei logo nisso, pois isto não é mais do que ponta do icebergue...
Infelizmente... parece que uma tragédia na Itália... pelo menos... pode estar para breve.
...
Caldera Formation
The main structure of the Phlegraean area is a large (nearly 12 km diameter)
caldera formed about 35,000 years ago by collapse after the eruption of the
Campanian Ignimbrite. Half of the caldera is submerged beneath the sea in the Gulf of Pozzuoli. Volume of the caldera is estimated to be 80 cubic km. The second Phlegraean period consisted of eruption of tuffs from several vents 14,000 to 10,500 years ago. The magma-equivalent volume for this phase is estimated at 10.5 cubic km.
1538 Monte Nuovo Eruption
Ground uplift in 1502 was observed by residents of Pozzuoli. Moderate seismic activity was recorded two days before the eruption. On 29th September 1538 the eruption began in Campi Flegrei forming a new volcano, Monte Nuovo. The first two days of the eruption consisted of explosive activity, with small pyroclastic flows, and growth of a cone around the vent. The eruption ended on 6th October with a violent explosion, which killed twenty-four people, who were climbing the vent.
Older Eruptions
Two violent eruptions occurred at the volcano 12,000 and 35,000 years ago. Campi Flegrei caldera shows "bradyseism" which is the alternating uplift and sinking of the ground within the caldera.
http://www.volcanolive.com/campiflegrei.html
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lserpa
Cumulonimbus
Tendo em conta que é um super vulcão, espero que se ele entrar em erupção, seja uma bem pequenina... if you know what I mean!!
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Dias Miguel
Cumulonimbus
Podia ser que o Vesúvio alivia-se a pressão, tal como o fez durante muitas outras erupções, mas creio que nessa área têm estado relativamente calmas...
Seja como for, numa zona tão populosa como a de Nápoles, sem dúvida que seria uma tragédia...
Seja como for, numa zona tão populosa como a de Nápoles, sem dúvida que seria uma tragédia...
O Campi Flegrei e o Vesúvio pertencem a sistemas diferentes, penso eu. Seja como for com um super vulcão não se brinca. E como diz o amigo Iserpa se existir erupção que seja bem pequena. Toda aquela região é um fascínio para os geólogos, fonte das melhores amostras de enxofre cristalizado do mundo da famosa solfatara pozzuoli. Enfim um gigante ainda adormecido.Podia ser que o Vesúvio alivia-se a pressão, tal como o fez durante muitas outras erupções, mas creio que nessa área têm estado relativamente calmas...
Seja como for, numa zona tão populosa como a de Nápoles, sem dúvida que seria uma tragédia...
Dias Miguel
Cumulonimbus
Independentemente da sua diferenciação em termos técnicos, dois vulcões tão próximos têm de ter alguma ligação, por muito ténue que pareça...
Sim concordo. Os sistemas podem ser separados mas serão interdependentes logicamente.Independentemente da sua diferenciação em termos técnicos, dois vulcões tão próximos têm de ter alguma ligação, por muito ténue que pareça...
INTERNACIONAL 20 de setembro 2017
Sismo faz vulcão entrar em erupção no México
O vulcão Popocatépetl, situado nas fronteiras entre Morelos, Puebla e Estado do México, entrou em erupção no seguimento do sismo de 7.1 na escala de Richter que abalou a cidade do México.
O Centro Nacional de Prevenção de Desastres decretou alerta vulcânico amarelo fase 2 após verificar que a população poderia correr risco de vida, optando por evacuar a zona.
Indonesia raises alert level for Bali volcano
September 14, 2017
Indonesia raised the alert level Thursday for the Mount Agung volcano on the tourist island of Bali following an increase in volcanic earthquakes.
The National Disaster Mitigation Agency said the alert has been raised from normal to vigilance.
The country's geological agency recommends villagers and visitors stay further than 3 kilometers (1.8 miles) from the mountain's crater. The surrounding Karangasem district, an area of about 840 square kilometers (324 square miles), has a population of 408,000.
The disaster agency said the volcano last erupted in March 1963, killing some 1,100 people and hurling ash as high as 10 kilometers (16 miles).
It warned against panic, saying there would be further increases in volcanic activity and changes to the alert level before an eruption.
Read more at: https://phys.org/news/2017-09-indonesia-bali-volcano.html#jCp
September 14, 2017
Indonesia raised the alert level Thursday for the Mount Agung volcano on the tourist island of Bali following an increase in volcanic earthquakes.
The National Disaster Mitigation Agency said the alert has been raised from normal to vigilance.
The country's geological agency recommends villagers and visitors stay further than 3 kilometers (1.8 miles) from the mountain's crater. The surrounding Karangasem district, an area of about 840 square kilometers (324 square miles), has a population of 408,000.
The disaster agency said the volcano last erupted in March 1963, killing some 1,100 people and hurling ash as high as 10 kilometers (16 miles).
It warned against panic, saying there would be further increases in volcanic activity and changes to the alert level before an eruption.
Read more at: https://phys.org/news/2017-09-indonesia-bali-volcano.html#jCp
- Estado