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Sun, 21 Apr 2019
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Volcanoes


Attention

Bali volcano erupts again

Mount Agung

Mount Agung
Mount Agung on Indonesia's resort island of Bali has erupted again, spewing volcanic ash into the sky to a height of two kilometres, an official said.

The eruption comes as Australians flock to the island for school holidays but flights have not been impacted with Denpasar airport still operational.

The active volcano erupted at 3.21am on Sunday and the thick ash column was blown to the southwest, causing a drizzle of volcanic ash in Karangasem, Bangli and Klunglung districts, Sutopo Purwo Nugroho, a spokesman for the national disaster mitigation agency, said.

There were no immediate reports of casualties but the volcano's status remains on alert or level three of four possible levels and authorities continue to impose a four-kilometre exclusion zone.


Attention

Mount Aso in Kumamoto, Japan erupts - first time in two and a half years

Smoke and ash spews out of Mount Aso in Kumamoto Prefecture on April 16.
© Japan Meteorological Agency
Smoke and ash spews out of Mount Aso in Kumamoto Prefecture on April 16.
An eruption was observed on Mount Aso in Kumamoto Prefecture about 6:28 p.m. on April 16, according to the Japan Meteorological Agency, the first in two and a half years.

From about 1:30 p.m. on April 14, the agency detected volcanic tremors at Mount Aso had begun intensifying and a large volume of volcanic gas was also being emitted.

The alert level for Mount Aso was raised from the lowest 1 to 2, meaning restrictions would be placed on approaching the crater.



Info

'Morphospace' governs recovery after mass extinction

Mass Extinction Event
© MARK GARLICK/SCIENCE PHOTO LIBRARY/Getty Images
The re-establishment of species diversity following an extinction event is consistently slower than evolutionary theory predicts.
Theory tells us that after a mass extinction, an event where the diversity of species is drastically reduced, nature should rebound with a flurry of creativity. Species should quickly proliferate to refill desolate ecosystems, something called adaptive radiation.

Yet, the paleontological record suggests that this doesn't happen at anywhere near the expected pace. Now, research published in the journal Nature Ecology and Evolution argues that understanding something called "morphospace" might help us find the cause.

Extinction events happen with alarming regularity: there's the "big five", but a host of slightly smaller, yet still devastating extinctions have peppered the planet's history.

Scientists now worry that we might be in the middle of one of our own making, so this makes it all the more important to understand how the natural world bounces back from such catastrophes.

Perhaps the most well-known of the earth's mass extinctions is the Cretaceous-Paleogene (K-Pg) extinction event. This took place 66 million years ago when an asteroid smacked into the earth next to what is now the Yucatán Peninsula, creating the nearly 200-kilometre-wide depression known as the Chicxulub crater. This impact drove the extinction of all the non-avian dinosaurs, and much else besides.

Attention

Powerful eruption at Kamchatka Volcano (Shiveluch), Russia - ash fired 10km into stratosphere

VOLCANO
Strong explosive activity continues today, April 10 at Kamchatka volcano (Shiveluch), Russia.

Volcanic Ash Advisory Center (VAAC) Tokyo warned of a large volcanic ash plume rising to 33,000 feet (10.1km), or flight level 330, and moving 45 kts to the south.

Particulates ejected to altitudes above 32,800 feet (10km), and into the stratosphere, have a direct cooling effect on the planet.

The KVERT observatory warns that ash explosions of up to 49,200 feet a.s.l. could occur at any time.

This unstable stratovolcano, with a recent eruptive history littered with VEI 4s and 5s, has seen a tremendous uptick in activity so far in 2019.


Attention

New thermal area discovered at Yellowstone supervolcano

Yellowstone
© MLADEN ANTONOV/AFP/Getty Images
A view of the Lower Falls at the Grand Canyon of the Yellowstone National Park on May 11, 2016. Yellowstone, the first National Park in the US and widely held to be the first national park in the world, is known for its wildlife and its many geothermal features.
Scientists have discovered a new thermal area at Yellowstone National Park, which is believed to have grown in the past two decades.

Experts at the Yellowstone Volcano Observatory found what appeared to be a previously unknown pocket of warmth nestled between West Tern Lake and the Tern Lake thermal area after studying the latest thermal infrared images of the National Park taken in April 2017, according to the U.S. National Geodetic Survey.

The team then checked high resolution aerial photos of the same spot captured in 2017 by the The National Agriculture Imagery Program, and noticed dead trees and bright soil. These were the signs of a thermal area they were expecting to find. In contrast, a 1994 picture showed a crop of healthy trees which started to fade in a 2006 image.

Researchers therefore believe the thermal area near the northeast border of the Sour Creek resurgent dome first emerged in the late 1990s or early 2000s.

Comment: That record breaking year wasn't limited to just the Steamboat geyser and, when taken together, these events are likely to be a sign that there is an unusual uptick in activity at Yellowstone. And it's not only Yellowstone:


Attention

Mount Agung erupts in Indonesia, spewing out 2,000-meter high column of ash

mount agung
Mount Agung, the highest mountain on Bali, erupted early morning on Thursday, spewing out a massive column of smoke and ash 2,000 meters high, causing panic among residents praying at a local temple.

The Center for Volcanology and Geological Hazard Mitigation (PVMBG) maintained the volcano's alert level at siaga (stay on alert), the third level of the four-tiered alert system. The center also set the danger zone at a 4-kilometer radius from the crater.

The latest eruption occurred at 1:31 a.m. on Thursday, the Mount Agung observatory post reported. A seismograph recorded an eruption amplitude of 25 mm and a duration of 3 minutes and 58 seconds, with a thundering sound that could be heard from the post.


Attention

Mexico raises alert level after Popocatepetl volcano eruption

Popocatepetl volcano
© Hilda Rios/EPA-EFE
A general view of the Popocatepetl volcano from the city of Puebla, Mexico. Mexico's National Disaster Prevention Center raised its alert for the Popocatepetl volcano due to increased activity on Thursday.
Mexico's National Disaster Prevention Center raised its alert for the Popocatepetl volcano due to increased activity on Thursday.

The agency raised the warning level from yellow Phase 2 to yellow Phase 3 after an eruption occurred at 6:50 a.m. sending a plume of ash more than a mile and a half into the air.

It also recorded 61 exhalations at the volcano within the past 24 hours.

"The CENAPRED urges NOT TO APPROACH the volcano and especially the crater, because of the danger involved in the fall of ballistic fragments," the agency said.

Yellow Phase 3 is the highest level of warning before the red phase, which would include an advisory for people around the volcano to evacuate.


Arrow Up

Mexico's Popocatepetl volcano suffers largest eruption in years

Popocatepetl Volcano, Mexico
© Reuters/ Imelda Medina
FILE PHOTO: Popocatepetl Volcano, Mexico
Mexico's active Popocatepetl volcano has exploded late Monday evening, sending ash and debris high into the air and several kilometers away from the crater.

The 9:38 pm explosion of the active crater sent a 1.2km-high column of ash and fragments into the air, the country's civil protection said, releasing footage of the blast.


Attention

Two explosions reported from Mexico's Popocatépetl Volcano

Popocatépetl volcano

Popocatépetl volcano
Two explosions were observed from the Popocatépetl volcano in central Mexico on the morning of Saturday, March 16, the country's civil protection agency (CNPC) said.

This footage shows an observation flight over the volcano, shared on Friday, and national disaster management agency footage showing the two explosions at 2.57am and 9.30am on Saturday, according to CNPC.The agency on Friday had shared footage from a observation flight over the volcano, which erupted a week prior.


Arrow Up

Powerful eruption at Bezymianny volcano, Russia sends ash plume 15.2 km (50,000 feet)

Eruption of Bezymianny volcano at 17:29 UTC on March 15, 2019
© KB GS RAS
Eruption of Bezymianny volcano at 17:29 UTC on March 15, 2019.
Explosive activity continues. Volcanic Ash Advisory Center (VAAC) Tokyo warned about a volcanic ash plume that rose up to estimated 50000 ft (15200 m) altitude or flight level 500 and is moving at 50 kts in E direction.