[Vulkanen] The ring of fire #5: Het blijft actief

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ECUADOR - Tungurahua volcano

July 8th, 2010
As of the 25th of June, the Instituto Geofísico-Escuela Politécnica Nacional (IG) has reported that Reventador volcano continues presenting/displaying moderate levels of eruptive activity characterized by the occurrence of a small small volcanic dispersion volume and of earthquakes of volcanic origin. A total of 10 seismic movements of long period (LP) were entered, 9 explosions, 2 episodes of spasmodic tremor.
........
Following the explosions one noticed episodes of tremor to which noises and roars were associated type exhalation of median to strong. Sometimes, between clouds it was possible to be observed volcanic gas and aqueous vapour emissions with low loads moderate of ash that went to the West and the Southwest of the volcano. It was received reports of fine ash falls of white colour along with drizzles in Chonglotus, during this behind schedule. Light rains in all the western flank of the volcano without generating lahars or flows of mud were registered. On 2 June a pyroclastic flow traveled 1.5 km down the NW flank. Tungurahua is a steep-sided stratovolcano or a conical volcano composed of many layers of hardened lava, tephra, and volcanic ash and is located near Ecuador's fourth largest city of Ambato, some 140 km south of the capital Quito.

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Due to a SVE fieldtrip, this page will not updated until the 27th of July, sorry for the inconvenient

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Op dinsdag 13 juli 2010 14:52 schreef horned_reaper het volgende:
Is er al meer bekend over Yellowstone?

En de vulkaan in Napoli begint ook al te borellen ?

Zullen wij dan de Generatie zijn die een Vei 7 of Vei 8 uitbarsting mee gaan maken?

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Op dinsdag 13 juli 2010 14:52 schreef horned_reaper het volgende:
Is er al meer bekend over Yellowstone?

En de vulkaan in Napoli begint ook al te borellen ?

Zullen wij dan de Generatie zijn die een Vei 7 of Vei 8 uitbarsting mee gaan maken?

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Op dinsdag 13 juli 2010 21:20 schreef luckyb1rd het volgende:

[..]

yes we gaan weer dood Je zal maar net aan het rukken zijn als een pyroclastische wolk over je heen rolt.. Echt lullig als men je dan 2000 jaar later met je lul in je hand opgraaft..

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Op dinsdag 13 juli 2010 21:41 schreef Daywalk3r het volgende:
Als Yellowstone uitbarst zijn we doomed.

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Op dinsdag 13 juli 2010 21:45 schreef kahaarin het volgende:

[..]

Zeker weten, dan ziet de wereld er voor lange tijd heel anders uit.

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Lake Taupo... a giant timebomb...
Beneath the waters of Lake Taupo lies one of the world's biggest volcanoes and scientists say an eruption would be one of the most life threatening events New Zealand has ever faced.

They say an eruption involving New Zealand's largest lake would dwarf the trouble caused by the 1995 Ruapehu eruption and lahar flows since then.

"Taupo on a global scale is a very large volcano. ]b\The crater is somewhere in the order of 15 and 20 kilometres in diameter[/b], so it's right up there in the top ten globally for size," said volcanologist Brad Scott.

Other experts think it could even eclipse the worldwide disruption caused by the Icelandic volcano three months ago.

"We know that the North Island would be pretty heavily damaged and everything would be affected, basically starting with the airplanes," said volcanologist Nico Fournier.

But scientists say that there will be plenty of warning signs before the big bang including more frequent earthquakes, hot springs around Taupo drying up and the lake could start bubbling.

Fournier says scientists are always on alert, monitoring the lake 24 hours a day, seven days a week.

"We know the volcano is still doing things, but it's not yet fully understood. It's something we're actually doing research on at the moment to see if it really is the volcano acting up a bit," Fournier said.

The Taupo volcanic zone is one of the most active in the world. There are 12 active volcnoes and at least 30 geothermal hot spots that stretch from Mount Ruapehu to White Island.

"We have people living on or playing on those volcanoes almost every day, like the skifields at Ruapehu and the tourism at White Island, so we definitely pay a lot of attention to those in the short term. But we treat the Taupos equally the same," says Scott.

Peter Lechner from the Civil Aviation Authority says in the event of Taupo erupting, shutting airports is dependent on the degree of the volcanic fallout.

"The eruptions we've seen so far not a big problem, if we had a massive eruption out of Taupo, I don't think aviation would be operating much at all," he said.

Phil Parker from the Civil defence says New Zealand is not well prepared to deal with an eruption.

"People may need to self evacuate because we don't have the personnel to evacuate everybody. We rely heavily on people doing it themselves," he says.

Taupo erupts every 900 years on average, and the last big bang was 1700 years ago. Scientists say it's not a matter of if, but when.

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Op vrijdag 16 juli 2010 22:49 schreef Frutsel het volgende:
Niet alleen Yellowstone... er zijn meerdere supervulkanen...zoals Lake Taupo... in Nieuw Zeeland...met een krater van bijna 20km...
[..]

Ook een vulkaan die al 'over tijd' zou zijn... en geen kleintje...

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Op vrijdag 16 juli 2010 22:59 schreef Frutsel het volgende:
True, al zeiden ze ook dat tussen het triggeren van Katla en Eyfrutseljoekel wel een jaar kon zitten...maar dat het dan nog als "triggeren" zou gelden

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Op zaterdag 17 juli 2010 10:45 schreef Light het volgende:

[..]

Een jaar vind ik vrij ruim, ik zou uitgaan van maximaal ongeveer een half jaar. Gemeten vanaf de afloop van de uitbarsting van de Eyjafjallajökull.

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Op zaterdag 17 juli 2010 10:45 schreef Light het volgende:

[..]

Een jaar vind ik vrij ruim, ik zou uitgaan van maximaal ongeveer een half jaar. Gemeten vanaf de afloop van de uitbarsting van de Eyjafjallajökull.

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Op zondag 18 juli 2010 00:05 schreef Light het volgende:

[..]

Ik reken vanaf het eind van de uitbarsting van Eyjafjallajökull.

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Lava from Kilauea Volcano threatens home
Lava oozing from Kilauea Volcano forced the evacuation of a Kalapana couple and their dogs yesterday and closed within 100 yards of their house — one day after the flow crossed the Big Island's Kalapana access road and enveloped the intersection of Highways 130 and 137, sending up a plume of thick, black smoke.

The couple's two-story home is now landlocked by cooling lava as hotter, more destructive lava inches closer, Big Island Civil Defense Director Quince Mento said yesterday.

He declined to speculate on whether the home would be lost. "When you're dealing with Madame Pele, you don't want to take anything for granted," Mento said. "Things change. They can turn on a dime."

At least four other homes are in the area, but none is immediately threatened, said Mento, who has been driving to Kalapana every day to survey the lava's path.

For people who live in Kalapana, volcanic activity is part of daily life. "If you live there," Mento said, "you're aware of the risks."

The owner of the house in immediate danger had been surveying his property every day until county officials urged the couple to evacuate, Mento said.

The homeowners remain upbeat, even though they realize their house could go up in flames.

"It's unfortunate -- you feel very bad for them," Mento said. "But there's always hope that it could stop."

On May 21, Kilauea Volcano saw its 10,000th straight day of activity, making it the world's longest continuously erupting volcano.

Puu Oo -- or Kilauea's east rift zone vent -- started gurgling on Jan. 3, 1983, and a summit vent on Halemaumau Crater has been erupting since March 19, 2008.

Lava began marching onto the Kalapana access road around midnight Saturday, then took out the intersection of Highways 130 and 137 around 7 a.m. Saturday.

A crowd of "well over 1,000" people continues to stand watch 24 hours a day, even though the previous viewing area was destroyed on Saturday.

"It's now under a couple of feet of lava," Mento said.

The U.S. Geological Survey's Hawaiian Volcano Observatory posted photos that show lava burning through thick vegetation and covering about 300 yards of highway asphalt.

Earlier in the week, Jim Kauahikaua, scientist-in-charge at the U.S. Geological Survey's Hawaiian Volcano Observatory, wrote that "a circulating lava pond deep in the collapse pit within the floor of Halemaumau Crater" was visible via webcam, and three earthquakes with magnitudes of 2.9 and 3.0 were recorded below the Big Island.

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Vulkaan Kilauea op Hawaï is al 27 jaar aan het uitbarsten. Sindsdien leven de inwoners van de omringende dorpen voortdurend in angst voor de dreigende lava. Het huis van Gary Sleik was één van de eerste slachtoffers van 2010. De man vreesde al drie jaar dat de lava zijn woning zou overspoelen en had zich al neergelegd bij het idee dat dit ooit zou gebeuren. Nu zag hij zijn huis ook echt in de vlammen opgaan.

De huidige uitbarsting begon op 3 januari 1983 en heeft al een pak huizen in de as gelegd

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Scientists predicting Elbrus eruption this century
The highest mountain in Europe, volcano Elbrus might erupt in this century. Scientists arrived at this conclusion following the discovery of a colony of mosses at its peak.

The famous volcano in the Caucasus is over two million years old. Last time, it erupted 15-17 centuries ago. However, it might erupt once again within 50 years. Although scientists cannot say for sure whether this will happen or not, they have monitored post-volcanic activity, says the head of the Elbrus Scientific Research Centre of Moscow State University, Natalya Volodicheva.

“The post-volcanic activity is witnessed by the emission of fumarolic gases and the appearance of thermal springs,” says Natalya Volodicheva. “There are lots of thermal mineral springs around Elbrus the temperatures of which are about 21 degrees Celsius on the northern slope, as well as closed springs in several other places, which are even hotter. Travertine mineral water springs can be seen in several places too. All this is typical for regions where ancient and contemporary volcanoes are located,” Natalya Volodicheva said.

There is a need to study the concentration of emitting aerosol and helium to follow up the possible eruption of the volcano. If this is high, it means the volcano is becoming active. At the same time experts should study glaciations, says Natalya Volodicheva.

“Elbrus is covered with a thick layer of ice,” says Natalya Volodicheva. “However, there are no glaciers in the craters on the peak. The temperature on the eastern peak is very high, and the 20-degree temperature has been recorded at a height of 5,621 meters above sea level. Moreover, moss grows on the cracks of this surface. This is impossible under normal conditions. This means the surface is heating up,” Natalya Volodicheva said.

A group of scientists of the Shternberg Astronomical Institute of Moscow State University headed by Vadim Milyukov is working at the Neutrino Observatory located 25 kilometers away from Elbrus. They are studying the fluctuations of the earth’s crust and changes in the interior magmatic centre located under Elbrus using a laser interferometer. “At present, the upper chamber of the volcano is getting heated,” says Vadim Milyukov.

“Either the chamber is getting heated by itself or it receives hot lava from a deep pocket,” says Vadim Milyukov. “We have developed an advance method to control the volcano and are monitoring the resonance characteristics of its magmatic chamber and studying their rate of changes. All this shows that the volcano is getting heated. However, it is difficult to forecast when the volcano will erupt, there is a high probability that something might happen,” Vadim Milyukov said.

However, the scientist insists that there will be no eruption in the near future. Volcanic activity is always accompanied by earthquakes. The seismic activity is linked to the movements of magma before the eruption of a volcano. At present, this is not taking place under Elbrus.

The eruption of Elbrus poses a great danger. The melted ice and snow might flow as muddy slides from the eastern slope at a speed of 72 kilometers per hour and destroy all settlements on the way and reach the administrative centre of Kabardino-Balkaria, Tyrnyauz, where over 20 thousand people live

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Colombia volcano about to spew

Colombian authorities on Wednesday issued a red alert, the highest level, for the Galeras Volcano, indicating it could erupt at any moment.

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Volcano erupts in Colombia

Colombia's Galeras volcano erupted today, forcing authorities to order the evacuation of thousands, but residents in nearby villages and towns refused and hunkered down in homes, officials said.

Galeras, which has often spewed gas and clouds of gas into the skies in recent years, is located in Colombia's Andes about 500 kilometers south of Bogota near the frontier with Ecuador.

It erupted 10 times last year.

Authorities reported no immediate injuries or damage after the latest eruption. About 8,000 people live in risky areas around the volcano but many often refuse to leave their homes because they are used to frequent activity at the volcano.

"People are obliged to leave, no one can sit around debating over what might occur, even if up until now nothing has happened, we have to remain alert," interior minister German Vargas Lleras told local media.

Colombia's coffee federation had no reports of damage to crops in the area, a federation spokeswoman said. Colombia is the world's top producer of high-quality washed Arabia beans.

In previous eruptions, local residents reported large columns of smoke billowing over the volcano and towns were covered with layers of ash.

"The level of activity in the volcano shifted to red which means an imminent or current eruption," the country's National Geological Institute said in a statement earlier.

The last eruption was in January this year when authorities ordered an evacuation but no one was killed or injured. In 1993, a massive eruption at Galeras killed 10 people just as a scientific mission was examining the crater.

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Op woensdag 25 augustus 2010 16:37 schreef Frutsel het volgende:

[..]

Is ie nou al geploft of was dat een voorwaarschuwinksplofje?

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Op woensdag 25 augustus 2010 16:46 schreef kahaarin het volgende:

[..]

*gezondheid*

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Op woensdag 25 augustus 2010 16:53 schreef Frutsel het volgende:
Ik zei je gister nog: steek eens een vulkaan in de hens.. het is stil

en bedankt!

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Colombians evacuated as Galeras volcano erupts
2hrs 21 mins ago
BOGOTA, Colombia – The Galeras volcano is erupting in southwestern Colombia, forcing scores of people to evacuate from their homes.

Marta Calvache of Colombia's Geology and Mining Institute says a burst of gases, ash and vapor rose from the volcano at about 4 a.m. (0900 GMT) on Wednesday. The mountain's peak is 14,029 feet (4,276 meters) above sea level.

Carlos Ivan Marquez of the Colombian Red Cross says 278 people have evacuated from the area around the volcano.

He says so far there are no reports of damage.

*Je post PM's trouwens! Lol, bij deze dan toestemming. *

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Op woensdag 25 augustus 2010 17:00 schreef Frutsel het volgende:
LOL
jij verklapt het

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2010 eruption
The volcano erupted on January 3, 2010, forcing the evacuation of 8,000 people[15]. This is the 10th such eruption of the volcano in the past year, and the first of 2010. Colombian authorities also stated that it could remain volatile in the weeks to come.

Galeras erupted again on August 25, 2010 with an ash plume visible in the air. The eruption, which was described as non-explosive, caused authorities to raise an alert for neighboring towns.

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On Wednesday, Colombia's Galeras Volcano continued to spew smoke after an eruption earlier in the day.

Authorities ordered the evacuation of thousands of villagers.

While some residents packed up and headed for protected buildings, many in nearby villages and towns refused and hunkered down in homes.

Galeras, which has often spewed gas clouds into the skies in recent years, is located in Colombia's Andes about 310 miles south of Bogota, near the frontier with Ecuador.

Authorities reported no immediate injuries or damage after the latest eruption.

Around 8,000 people live in risky areas around the volcano but many often refuse to leave their homes because they are used to frequent volcanic activity.

Galeras erupted ten times last year and has now awakened again.

Area volcanologist Diego Gomez says the increased activity makes predictions difficult. Gomez is recommending that people move away from the volcano.

[Diego Gomez, Volcanologist]:
"In this state of instability, the volcano's eruption process can vary. We can't guarantee anything. It's unstable. The eruptions can increase and that's why it's important that people who live in high-risk areas heed the call of authorities and not wait for this to evolve more. It's a call to be reasonable and prevent accidents."

Nonetheless, hundreds of residents in the town of Pasto, which sits at the foot of the volcano, walked placidly through the streets, Wednesday.

Pasto-resident, Baby Munoz, says locals are used to the rumbling above.

[Baby Munoz, Pasto-Resident]:
"I woke up my daughter and went out to look at the volcano and it wasn't doing anything. You couldn't see anything and everyone was calm. It always scares us but never does anything.”

In 1993, a massive eruption at Galeras killed ten people, just as scientist were examining the crater.
With the volcano's volatile history in mind, Mirian Maya and her family took a more cautious route, moving to refugee camps set up to get people out of harm's way.

[Mirian Maya, Refugee]:
"We're here mostly for safety and because we have young children. That's why we decided to evacuate."

The last eruption was in January this year, when authorities ordered an evacuation. No one was killed or injured.

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Sinabung volcano continues to erupt smoke
Mount Sinabung in regency of Karo in Indonesia's North Sumatra province continued gushing grey smoke on Saturday, blanketing area surrounding its crater, local media reported.

A local resident, Abadinta Barus, told Antara news service that the smoke was less thick than it was on Friday, when seismic activities of the volcano resulted in thundering noises and stirred panic among residents of nearby villages.

"The density of the smoke has far declined, but the smell of sulfur remains strong," he said.

The volcano blew up thick smoke and materials for several hours on Friday, but the authorities dismissed any possibility of eruption, which last occurred in the year 1600.

Despite the absence of evacuation order, hundreds of people fled their villages for safety to their relatives' houses in the neighboring regencies of Kabanjahe and Berastagi.

Dozens of Indonesian Red Cross volunteers and social service agency workers set up on Saturday emergency posts in villages near the volcano. They explained to the local people evacuation procedure if eruption occurred and distributed masks to protect them from respiratory problems.

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Evacuatie na vulkaanuitbarsting Indonesië

JAKARTA - In Indonesië zijn twaalfduizend mensen geëvacueerd, nadat de Sinabung-vulkaan op Sumatra voor het eerst in 400 jaar was uitgebarsten. Dat meldt het Indonesisch vulkaancentrum zondag.

De vulkaan spuwt as en rook tot anderhalve kilometer de lucht in. ''Eerst dachten we dat regen de oorzaak van de rook was, maar het blijkt om magma te gaan'', zei Surono, het hoofd van het vulkaancentrum.

''Het is een gevaarlijke situatie en dus hebben we de waarschuwingen verhoogd naar code rood.''

De as heeft een gebied bedekt tot zo'n 30 kilometer van de vulkaan vandaan. Mensen die wonen in de gevarenzone van 6 kilometer rondom de vulkaan zijn geëvacueerd.

Veel van de boeren in dorpjes rondom de vulkaan waren direct na de uitbarsting al op de vlucht geslagen voordat het evacuatieprogramma was begonnen.

Ademhalingsproblemen

Er waren geen meldingen van doden of gewonden, maar velen zouden wel kampen met ademhalingsproblemen door het inademen van de dikke rook met zwavel. De mensen die gevlucht zijn hebben zuurstofmaskers gekregen en zijn ondergebracht in tenten. Volgens de lokale autoriteiten is de situatie onder controle.

Indonesië heeft de hoogste dichtheid van vulkanen ter wereld. Het land is gelegen in de zogenoemde Ring van Vuur, een groot aardbevingsgebied rond de Grote Oceaan. Van de vulkanen zijn er 128 actief en gelden er 65 als gevaarlijk

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Thousands flee Sumatran Volcano
Thousands of Indonesians have been forced to flee after a volcano erupted on the island of Sumatra.

Officials issued a red alert after Mount Sinabung began to spew lava shortly after midnight (1900 GMT).

Smoke and ash reportedly shot 1,500m into the air, and witnesses said they could see lava from the volcano from several miles away.

Mount Sinabung, some 60km (40 miles) south-west of Sumatra's main city Medan, has not erupted for 400 years.

The volcano had been pumping out smoke all day Saturday, but alert levels had not been raised, and local media reported that villagers had been taken by surprise.

The Medan Tribune quoted one local resident as saying he panicked and ran when he saw lava coming towards his him "like a ball of fire".

Priyadi Kardono from Indonesia's National Disaster Management Agency told the BBC that more than 10,000 people were being evacuated from nearby villages.

But he added that some had already gone home as volcanic activity was decreasing.

Surono, head of the nation's volcano disaster alert centre, told AFP news agency that the alert level had been raised to red because the situation was "clearly dangerous".

"Initially we thought the ash and smoke were triggered by rain but now we know the driving pressure was from magma," he said.

The Indonesian archipelago lies on the Pacific "Ring of Fire" and has at least 129 active volcanoes.

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Volcano erupts again
A volcano on the Indonesian island Sumatra that had been dormant for more than four centuries has erupted for the second day in a row.

Mount Sinabung was again spewing out towering clouds of ash on Monday, forcing the evacuation of more than 21,000 people. Some aircraft had to be diverted because of poor visibility.

Villagers living along the slopes of the Sinabung in North Sumatra province have packed up their belongings and headed to emergency shelters, mosques and churches, Andi Arief, a presidential adviser on disasters, said.

Their abandoned homes and crops were blanketed in heavy, grey soot, and the air was thick with the smell of sulphur.

Eruption pattern unknown

Sinabung last erupted in 1600, so observers do not know its eruption pattern and admitted over the weekend that they had not been monitoring it closely before it started rumbling days ago in the lead-up to Sunday's first, less-powerful blast.

The island of Sumatra lies on the fault line of the Eurasian and Pacific tectonic plates that have been pushing against each other for millions of years.

Like other volcanoes along the Sumatra fault line, the Sinabung has the potential to be very destructive, Erick Ridzky, a disaster researcher, said.

A larger blast has the potential to darken skies across the region, he said, affecting air traffic in nearby Singapore and Malaysia.

Already, several domestic flights heading to the provincial capital of Medan had to be diverted, according to Bambang Ervan, spokesman for the transportation ministry.

"The eruptions are very difficult to predict. We don’t have enough data on the volcano," Surono, a government volcanologist who uses only one name, told Al Jazeera.

"We don't know what set it off, how long it will continue or whether we should expect pyroclastic flows or more powerful eruptions."

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Duizenden keren terug, ondanks dreiging
BRASTAGI - Duizenden Indonesiërs die waren gevlucht voor de uitbarsting van een vulkaan, zijn naar huis teruggekeerd. Functionarissen zeiden echter dat het nog onzeker is of het gevaar echt is geweken.

De vulkaan Sinabung in Noord-Sumatra was, voor het eerst in vierhonderd jaar, uitgebarsten. Een tweede, krachtiger uitbarsting volgde, waardoor pluimen donkergrijze rook en vulkaanas tot 2 kilometer hoogte stegen.

Circa 30.000 mensen waren geëvacueerd uit nabijgelegen dorpen. ''Tot vandaag zijn ongeveer zevenduizend van hen teruggegaan naar hun dorp'', zei het hoofd van het nationale rampenbestrijdingscentrum, Syamsul Maarif. ''Het is nog te vroeg om te zeggen dat het veilig is. We onderzoeken de situatie nog.''

Kolen en pepers
Ainun Nasution, die dicht bij de vulkaan woont, zei dat ze weer wilde werken op haar akkers met kolen en pepers. ''Ik ben bang dat mijn oogst mislukt door de as'', zei ze.

De vulkaan rookt nog steeds, maar de pluimen zijn kleiner dan de vorige dagen. De kleur is bovendien witter, wat duidt op stoom in plaats van vulkaanas

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Op woensdag 1 september 2010 09:55 schreef Frutsel het volgende:

Thousands flee Indonesia volcano

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Sinabung Volcano - John Seach
john

Sumatra, Indonesia

3.17 N, 98.392 E
summit elevation 2460 m
stratovolcano

Sinabung volcano is located in northern Sumatra adjacent to the town of Berastagi.

Sinabung volcano contains four overlapping summit craters, with solfatara activity present during the 20th century. The cone shows evidence of many lava flows.

Crater 1. Diameter 300 m.
Crater 2. Diameter 150 m. Contains crater lake.
Crater 3 (Batu Sigala). 160 m x 130 m. Contains crater lake.
Crater 4. Diameter 60 m.

Strong solfatara activity is found at crater 2 and 3.

2010 Eruption
Sinabung volcano erupted on 29th August 2010 for the first time in hundreds of years. Ash emissions reached a height of 1500 m. At least 12,000 people were evacuated.

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Paniek na nieuwe uitbarsting vulkaan Sumatra

JAKARTA - Op het Indonesische eiland Sumatra is vrijdag paniek ontstaan na een nieuwe uitbarsting van de vulkaan Sinabung. Volgens The Jakarta Post lagen veel mensen die waren teruggekeerd naar hun dorpen op de hellingen van de berg na twee eerdere erupties, te slapen toen de vulkaan weer actief werd rond kwart voor vijf 's morgens.

Het was de zwaarste uitbarsting tot nog toe. In de afgelopen dagen hadden vulkanologen al gewaarschuwd dat de hoogste alarmfase nog altijd van kracht was, maar veel Sumatranen trokken zich daar niets van aan en verlieten opvangkampen.

De uitbarsting van de Sinabung van zondag was de eerste in vierhonderd jaar. Een tweede, krachtiger uitbarsting volgde maandagochtend, waardoor pluimen donkergrijze rook en vulkaanas tot 2 kilometer hoogte stegen. De autoriteiten evacueerden circa 30.000 mensen.

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Op vrijdag 3 september 2010 09:57 schreef Frutsel het volgende:

[..]

Lekker dan Als dat maar goed gaat

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Krachtigste uitbarsting vulkaan Sinabung
_{Uitgegeven: 7 september 2010 09:24
Laatst gewijzigd: 7 september 2010 09:33}
KABANJAHE - De Indonesische vulkaan Sinabung, die vorige week na vierhonderd jaar weer actief is geworden, heeft dinsdag zijn krachtigste uitbarsting tot dusver beleefd.
De vulkaan schoot lava en vulkaanas tot 2,5 kilometer hoog in de lucht. De uitbarsting was tot 8 kilometer ver te voelen.

Geduld
De Indonesische president Susilo Bambang Yudhoyono, die de regio maandag bezocht, heeft de vluchtelingen om geduld gevraagd. ''Sinabung is erg actief met een reeks uitbarstingen, Voor uw eigen veiligheid kunt u beter voorlopig bescherming zoeken''.

De gevluchte omwonenden vrezen dat hun oogsten mislukken door de vele vulkaanas.
Ruim 20.000 mensen uit de regio zijn hun huizen ontvlucht sinds de uitbarstingen begonnen. Enkelingen hadden al geprobeerd terug te keren.

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Sinabung volcano (Sumatra, Indonesia): more and increasingly strong explosions

_{Tuesday Sep 07, 2010 07:53 AM | Age: 3 hrs}

At least one powerful explosion, probably the strongest so far, occured today at Sinabung volcano on Sumatra. The ash plume reached 25,000 ft elevation (ca. 8km) and the type of eruption can probably be best qualified as vulcanian, similar to Krakatau's activity in 2009. According to news articles, heavy ash fall prevented more than 23,000 people from returning to their homes.

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Mount Sinabung volcano on the Indonesian island of Sumatra has erupted again, sending ash and smoke several kilometres into the atmosphere.

Thousands of people living near the mountain evacuated their homes to stay in government-provided shelters.

According to airport officials, some domestic flights in the region have been affected by the volcanic ash.

Mount Sinabung, long considered to be inactive, erupted for the first time in 400 years in the early hours of Sunday.

Mr Surono, a government vulcanologist, told the BBC that the volcano erupted again early on Monday, spewing black ash and soot two kilometres (1.24 miles) into the air.

He said the eruption was bigger than Sunday's.

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De Indonesische vulkaan Sinabung in Noord-Sumatra is dinsdag tot de krachtigste uitbarsting gekomen sinds hij vorige week na vier eeuwen ontwaakte. Een grote wolk zwarte as schoot in de lucht. In dorpen op 25 kilometer afstand dwarrelden de asdeeltjes neer.

Sommige getuigen zeiden dat ze in scheuren langs de hellingen van de vulkaan een oranje gloed waarnamen, een teken dat er ook magma uit de krater komt. De berg schudde tijdens de uitbarsting gedurende drie minuten zeer heftig.

De eerste uitbarsting vorige week kwam volledig uit het niets. Met meer dan 129 actieve vulkanen in de regio hadden plaatselijke vulkanologen niet gemerkt dat de Sinabung uit zijn slaap ontwaakte. De vrees bestaat dat de huidige activiteit een voorbode is op een nog veel krachtiger uitbarsting in de komende weken of maanden, hoewel het ook mogelijk is dat de vulkaan alleen wat stoom afblaast en weer in slaap valt.

Meer dan dertigduizend mensen die op de vruchtbare hellingen van de vulkaan wonen, zijn geëvacueerd naar vluchtelingenkampen, moskeeën en kerken in nabijgelegen dorpen.

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Renewed activity and ashcloud at Mt Cleveland
UNALASKA, AK (kucb) - This weekend, Mount Cleveland showed yet more signs of activity. The volcano, located in the central Aleutians, has been fairly active this summer and it released a seven-kilometer plume containing ash and steam on Sunday morning.

Steve McNutt is a research professor at the University of Alaska-Fairbanks and a coordinating scientist at the Alaska Volcano Observatory. Here's what he can make out from the satellite imagery of the volcano.

"Satellite images showed a weak plume, possibly containing ash, in the vicinity of Cleveland Volcano," says McNutt. And this is not completely in isolation. The remote sensing data from several different sensors has showed over the last couple of weeks an increase in thermal anomalies. So that means when the satellites are flying straight overhead looking down in the volcano they see evidence of increased heat in the summit area"

Two weeks ago, AVO placed Cleveland on watch, and upped its status to yellow. But on Friday, AVO moved the volcano down to unassigned. Now, it's back on yellow and will be for some time, due to the difficulty of monitoring the volcano.

"The trouble with Cleveland is that it seems to be mildly active a lot of the time, and about half a dozen times a year it has these small to moderate eruptions with an ash plume up in the 15,000 to 20,000-foot range," says McNutt. "And because we don't have any monitoring equipment on it guesstimate when conditions are favorable."

Cleveland frequently emits ash, and plumes like this are released about six times a year. McNutt says that AVO is keeping a close eye on the volcano but that increased thermal activity doesn't necessarily mean a major eruption is on the way. Still, even small plumes could spell trouble for air travel and inconvenience nearby boats.

"The effects would be fine ash in the air, a little bit of ash fall on the ground," says McNutt. "For example, fishing boats in the vicinity might have had some ash fall on their decks. Airplanes flying locally would have noticed the sulfur smell and ash hitting the windshield. Part of the reason for our advisories is to keep local aircraft away."

Among the communities potentially affected are Nikolski and Atka, which receive air service from Unalaska. Trans-Pacific jet shouldn't be affected by a plume like this, since they fly at much higher elevations. The ash that erupted on Sunday drifted easterly, and McNutt said that AVO has not heard of any damage caused by the activity.