Calbuco volcano erupts in Chile

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In summary, an eruption at Calbuco volcano in Chile produced a bright red spout and ripple effect in the atmosphere.
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indeed ! thanks for the heads up, Astronuc :smile:
 
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Lots of great photos coming out
ImageUploadedByPhysics Forums1429804956.207360.jpg
ImageUploadedByPhysics Forums1429804972.452420.jpg
 
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One commentator mentioned no lava, but that bright red spout looks like lava to me.

Pretty intense eruption with an interesting cloud formation.



http://www.news.com.au/world/incredible-images-after-southern-chiles-calbuco-volcano-erupted-for-the-second-time/story-fndir2ev-1227317876287

That volcano is in the Southern Volcanic Zone of the Andean Volcanic Belt.


Volcanism and associated hazards: the Andean perspective
Active Andean volcanism: its geologic and tectonic setting Ubinas in southern Peru was a little active last week.Observatorio Volcanológico del Sur (OVS) - Peru

Observatorio Volcanológico de Los Andes del Sur (OVDAS) - Chile
http://www.sernageomin.cl/volcanes.php
Calbuco
 
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From spaceweather.com :

VOLCANIC BULLS-EYE: When Chile's Calbuco volcano erupted on April 22nd, plumes of ash and volcanic gas shot more than 50,000 ft above Earth's surface. Orbiting overhead in the darkness of space, the NOAA/NASA Suomi NPP satellite observed the ripple effect of the blast. Night had fallen over the volcano during the early hours of April 23rd when a low-light camera on the satellite photographed a "bulls-eye" pattern of waves centered on the rising plume:

bullseye_strip.jpg


Ripples like these have been observed before, high above powerful thunderstorms. They are called "gravity waves"--essentially, waves of pressure and temperature excited by the upward motion of air. (Gravity does not vary inside the waves; the waves get their name from the fact that gravity acts as a vertical restoring force that tries to restore equilibrium to up-and-down moving air.)

The waves are visible because they glow. Readers of spaceweather.com haveseen the phenomenon before--it's called "airglow." Airglow is caused by an assortment of chemical reactions in the upper atmosphere driven mainly by solar ultraviolet radiation. Gravity waves rippling away from the central axis of a thunderstorm or, in this case, a volcano, cause temperature and density perturbations in the upper atmosphere. Those perturbations alter the chemical reaction rates of airglow, leading to more-bright or less-bright bands depending on whether the rates are boosted or diminished, respectively.

Airglow occurs about 100 km above Earth's surface alongside meteors, noctilucent clouds and even some auroras. This makes airglow--and the bullseye above Calbuco--a true space weather phenomenon.
 
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cool, never seen an image of anything like that before

thanks for sharing :smile:
 

1. What caused the Calbuco volcano to erupt in Chile?

The Calbuco volcano erupted due to the build-up of high pressure magma beneath the surface, which eventually found a weak spot and erupted through it.

2. How long did the eruption last and when did it occur?

The eruption of the Calbuco volcano lasted approximately 90 minutes, starting on April 22, 2015 and ending on April 23, 2015.

3. Was there any warning before the eruption?

Yes, there were signs of increased seismic activity and an increase in gas emissions, which led to a yellow alert being issued by the National Geology and Mining Service of Chile a few hours before the eruption.

4. What were the impacts of the eruption?

The eruption caused significant ash fall and pyroclastic flows, leading to the evacuation of thousands of people and disrupting air travel in the region. It also resulted in agricultural and environmental damage and affected nearby communities.

5. Is the Calbuco volcano still active?

Yes, the Calbuco volcano is still considered active and has had several minor eruptions since the 2015 event. It is closely monitored by scientists and is considered a potential hazard to nearby communities.

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