[Vulkanen] The ring of fire #7: Gaia's hete inborst

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Vulkaanuitbarsting op Réunion

SAINT-DENIS (ANP) - Op het Franse eiland Réunion is vrijdag een vulkaan uitgebarsten. Plaatselijke media meldden dat de vulkaan, de Piton de la Fournaise (Top van de Oven), lava en rook uitstoot. De uitbarsting zou het zoeken naar wrakstukken van een vliegtuig waarvan woensdag een stuk vleugel op het eiland aanspoelde, kunnen bemoeilijken, bijvoorbeeld als helikopters aan de grond moeten blijven.

De vulkaan, in onbewoond gebied in het zuidoosten van het eiland, is een van de actiefste ter wereld en barst al voor de derde keer dit jaar uit. De uitbarstingen in februari en in mei duurden enkele dagen.

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Are Volcanoes Erupting More Frequently?

It seems like there have been a lot of volcanic eruptions lately.

Popocatépetl volcano in central Mexico has been spewing ash and smoke for months, while Colima, also in Mexico, continues to erupt regularly. In Japan, Sakurajima keeps threatening to erupt in a big way, and some scientists believe it will happen soon. According to Volcano Discovery, there are at least eight volcanoes currently active around the world.

If you're wondering what all this activity means, you're not alone. Scientists are asking the very same questions. They've been studying active periods of volcanic eruptions to see if there's a trend, or even if something's causing the increase in these events – and they still don't have any concrete answers.

Last year, a new study was released suggesting the speed at which the Earth spins may have an effect on the amount of volcanic activity. The belief is that the extra energy the sun uses to alter the speed of Earth's spin, even by the smallest amount, can transfer hundreds of thousands of petajoules of energy into the subsurface, and that may trigger additional eruptions.

Some researchers have also said global warming may be to blame. According to a 2012 study in the journal Geology, melting of land ice could relieve pressure off continents, which may allow magma to surge up more easily, leading to a higher likelihood of more eruptions. A 2015 study in Iceland had similar findings, according to Time.

But the scientists of both studies agree that the ties between climate change and more eruptions aren't concrete, and more examination needs to be done before any conclusions can be drawn.

"The link between climate change and volcanism is still poorly understood," Dr. Robin Wylie, researcher of volcanology at the University College of London, said in the Conversation, a science magazine based in the UK.

If either of these theories are proven to be true, Wylie adds, it would be yet another example of how the smallest changes in our world can have major consequences.

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Op woensdag 19 augustus 2015 13:56 schreef Frutsel het volgende:

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twitter:

eruptionsblog twitterde op woensdag 19-08-2015 om 23:19:32 AAAAAAAH (gasp) AAAAAAAAH (thud): http://t.co/3Q1kvcTuPL reageer retweet

twitter:

eruptionsblog twitterde op woensdag 19-08-2015 om 23:21:35 I guess I have to tell @sean_breslin that no, volcanic activity is not increasing. All normal on volcano front. reageer retweet

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Tungurahua volcano (Ecuador): ash emissions

New ash explosions took place at the volcano the day before yesterday (3 July), generating a plume that rose approx. 1 km above the summit and caused light ash fall on the western slope.
This was the first significant activity since the weak eruptive episode in April.
IGEPN reported moderate internal activity and does not exclude that more vigorous eruptions might follow in the near future.

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Meru volcano (Tanzania) new eruption reported, first in 105 years

A new eruption has been reported yesterday from the volcano, which has last been active 105 years ago.

An ash plume was seen rising approx. 1 km and drifting NW from what looks like a lateral vent on the northern slope of the volcano near Arusha town. The are no reports of damage or fatalities.
According to local sources, people in the area around the volcano have been experiencing an increased number of small felt earthquakes in recent months.

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Meru volcano (Tanzania): false eruption report - plume caused by forest fire
Monday Sep 21, 2015 19:17 PM | BY: T

The volcano is NOT erupting. The reported eruption turned out to be a false report - what seemed to be an ash plume was in fact caused by a huge forest fire on the slopes of Meru

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Alertlevel Mauna Loa Hawaii raised
HILO, Hawaii —Scientists at the U.S. Geological Survey Hawaiian Volcano Observatory have elevated the Volcano Alert Level for Mauna Loa from normal to advisory. This change in status indicates that the volcano is showing signs of unrest that are above known background levels, but it does not mean that a Mauna Loa eruption is imminent or certain.

HVO's seismic stations recorded elevated rates of shallow, small-magnitude earthquakes beneath the summit, upper Southwest Rift Zone, and west flank of Mauna Loa for at least the past year. During this same time, HVO monitoring instruments have measured ground deformation on Mauna Loa that is consistent with recharge of the volcano's shallow magma storage system. Together, these observations indicate that Mauna Loa is no longer at a background level of activity.

Based on these changes in activity, and in accordance with the USGS Volcanic Activity Alert-Notification System, HVO raised the Volcano Alert Level for Mauna Loa to advisory and the Aviation Color Code to yellow. The Volcano Alert Level is a four-tiered system that uses the terms Normal (background levels), Advisory, Watch, and Warning (highest threat) to inform the public about a volcano’s status. These alert levels are issued in conjunction with Aviation Color Codes, which provide information about volcanic-ash hazards to the aviation industry. The codes are Green (background), Yellow, Orange, and Red (eruption imminent).

An advisory/yellow status is declared when one or more volcano monitoring parameters are above the background range of activity, which is the current situation on Mauna Loa. Progression toward an eruption is by no means certain, but the volcano is closely watched to track how the unrest develops.

"It's possible that the increased level of activity at Mauna Loa could continue for many months, or years, without leading to an eruption," said Tina Neal, HVO’s Scientist-in-Charge. "It is also possible that the current unrest could be a precursor to the next eruption of Mauna Loa. But at this early stage, we cannot determine precisely which possibility is more likely."

HVO previously maintained an advisory/yellow status for Mauna Loa following increased rates of ground deformation during the rapid inflation of the volcano in 2004-2005. That period of inflation, similar to deformation currently observed, did not result in an eruption. When the inflation slowed to background levels in early 2010, the status of Mauna Loa was returned to normal/green.

The most recent eruption of Mauna Loa, which began on March 25, 1984, and lasted just over three weeks, was preceded by up to three years of increased earthquake activity. But, in contrast to pre-1984 activity, the energy released by recent earthquakes remains comparatively low.

HVO continues to closely monitor Mauna Loa, and will notify Hawai'i County Civil Defense, the National Park Service and other emergency managers, as well as the public, if significant changes are detected.

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Op dinsdag 29 september 2015 11:51 schreef GekkePoes het volgende:

Supercharged Volcanic Ash ignites Lightning BBC Earth

Vulkaanas veroorzaakt bliksem

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Op dinsdag 29 september 2015 11:51 schreef GekkePoes het volgende:

Supercharged Volcanic Ash ignites Lightning BBC Earth

Vulkaanas veroorzaakt bliksem

Explosión volcán Calbuco / Calbuco volcano explodes! / 该�尔布科�山爆炸! / Извержение

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Veniaminof volcano (Alaska, USA): alert level raised due to increased seismic activity

Seismic trace of Veniaminof volcano, VNH station (AVO)
Over the past day, seismicity at Veniaminof has increased and is ongoing in the form of volcanic tremor, the Alaska Volcano Observatory (AVO) reported.
The Aviation Color Code was raised to Yellow and the Volcano Alert Level to Advisory.

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http://www.rtlnieuws.nl/n(...)i-gestaakt-om-aswolk


Reizigers die vandaag met KLM van Amsterdam naar Bali vlogen, zijn gestrand in Singapore. Het is te gevaarlijk om te vliegen door de grote aswolk uit de vulkaan Rinjani.

De vulkaan staat op Lombok. Dat eiland ligt vlak bij Bali, waar een van de grootste vliegvelden van Indonesië ligt, Denpasar.

Gestrand
De Rinjani spuwt al dagen zoveel as, dat vliegtuigen gevaar lopen. "Hoeveel passagiers er zijn gestrand weten we niet. Maar gestrande reizigers worden opgevangen in hotels", laat een woordvoerder van KLM weten.

KLM wil morgen pas beoordelen of ze weer gaan vliegen.

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Tienduizenden toeristen vast op Bali na vulkaanuitbarsting

De luchthaven van het Indonesische Bali schrapt bijna zevenhonderd vluchten vanwege de uitbarsting van de vulkaan Rinjani op het nabijgelegen eiland Lombok. De as die de vulkaan uitspuwt, maakt vliegen onmogelijk.

De luchthaven van Denpasar is een van de drukste van Indonesië. De luchthaven blijft in elk geval tot morgenochtend dicht. Daarna wordt de situatie herbekeken, aldus een woordvoerder van de luchthaven. De vulkaan kwam afgelopen weekend tot leven. Tienduizenden toeristen zijn gestrand door de stremming op de luchthaven.

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Kanlaon Volcano spews ash; no injuries reported

ANLAON Volcano in Negros region on Monday night spewed ash that reached 4,921 feet (1,500 meters) above its summit.
The minor ash eruption started at 9:55 p.m. and ended at 10:03 p.m., according to a notification by the Philippine Institute of Volcanology and Seismology (PHIVOLCS).
Rumbling noise was heard in Barangay Mananawin and Sitio Upper Pantao, Barangay Pula, Canlao City in Negros Oriental province as the volcano ejected ash.

Kanlaon Volcano, which has an elevation 2,435 meters, has erupted 26 times, making it one of the most active volcanoes in central Philippines.
The initial report did not mention any injuries or damage to property.

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Philippines raised to level 1 alert after steam explosion at summit. 4 km radius permanent exclusion zone.

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Seismologists watching Glacier Peak after four earthquakes

Four earthquakes struck within hours of each other Wednesday afternoon near Glacier Peak in Washington.

The first two earthquakes registered at magnitudes 3.1 and 3.5.

The first earthquake occurred at 12:11 p.m. The second registered roughly an hour later at 1:20 p.m.

Then a third earthquake — a magnitude 1.6 — occurred at 2:33 p.m.

And finally a fourth earthquake — a magnitude 1.4 — was registered at 3:44 p.m.

All the quakes were recorded roughly 19-21 miles east-southeast of the town of Darrington.

Seth Moran, geophysicist at the University of Washington, tells KIRO Radio they're keeping a close eye on the area and continue to watch the seismic records.

"Magnitude 3 earthquakes happen in Washington and Oregon a number of times per year," Moran said. "The one thing that makes these potentially interesting in a different way is they're somewhat close to Glacier Peak."

The quakes, about three miles from Glacier Peak, occurred where there haven't been a lot of magnitude 3 earthquakes in the past, according to Moran.

"The last time there was a magnitude 3 in the vicinity was in 1991," Moran said.

However, there isn't a great network of seismic instruments in the area.

There have been no reports of damage or injuries.

According to the USGS, the last time Glacier Peak erupted was 1,100 years ago. Mount St. Helens and Glacier Peak are the only volcanoes in Washington state that have been explosive in the past 15,000 years.

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Op woensdag 2 december 2015 12:29 schreef TheRipper het volgende:
Momotombo in Nicaragua begint wat te rommelen: link
[ afbeelding ]

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Op maandag 4 januari 2016 16:28 schreef Frutsel het volgende:

Guatemala: Fuego volcano spits lava and ash into the night sky

FUEGO in Guatemala ook weer bezig

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Op maandag 4 januari 2016 19:24 schreef Coelho het volgende:

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Ik heb een jaar of 12 geleden de Fuego zien uitbarsten toen we op rondreis Antigua aandeden. Indrukwekkend! Sowieso heel bijzonder om een vulkaan te zien uitbarsten (wanneer je op veilige afstand staat).

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Op maandag 4 januari 2016 22:49 schreef Frutsel het volgende:

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nice!
nog video's gemaakt toevallig?

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People evacuated after eruption Mt. Egon
MORE than 1,200 people have been evacuated from their homes to escape a gurgling volcano in eastern Indonesia spewing clouds of ash and toxic gas into the air.

Officials said they had distributed thousands of gas masks to villagers around Mount Egon in eastern Flores island as the choking fumes from the volcano intensified.

All residents within three kilometres of the volcano were ordered to evacuate and roads were also closed. Authorities said they were prepared to issue a wide-scale evacuation order if the situation deteriorates further.

“We are on a high alert and ready to evacuate any time,” disaster mitigation official Silvanus Tobi told AFP.

The volcano is popular with tourists, but it is unknown if any were near the volcano at the time it began erupting.

The volcano began rumbling last month but has become more active in recent days, sending villagers fleeing from their homes.

During its last serious eruption in 2008, Mount Egon blasted smoke and volcanic material nearly six kilometres into the atmosphere.

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El Misti: Showing signs of activity
For the first time in more than 500 years, Peru's El Misti volcano is showing signs of potentially eruptive activity.

According to the committee charged with volcanic risk management for the region of Arequipa, El Misti is one of a dozen potentially active volcanoes in Peru but its proximity to a million residents have the officials concerned.

Gas emissions and magmatic activity have been recorded, Peru This Week reports, but officials note the activity does not necessarily pose an immediate danger of eruption.

Officials warned people living nearby to refrain from building property too close to the volcano and to be prepared for evacuations, Wired reports.

According to the Smithsonian Institution's Global Volcanism Program, El Misti is Peru's most well-known volcano and hasn't had a major eruption since the 15th century.