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Fri, 24 Sep 2021
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Volcanoes

Cloud Lightning

Video captures spectacular upward lightning display at Guatemala's Volcan de Agua

upward lightning was spotted at Guatemala’s Volcan de Agua
© Alyssa Barrundia
The upward lightning was spotted at Guatemala’s Volcan de Agua
Upward lightning shooting from the top of a mountain has been captured on camera by an amateur photographer.

Alyssa Barrundia, a missionary living in Guatemala, captured the spectacle at Volcan de Agua in the south of the Central American country on Friday.

Ms Barrundia said it was the second time in the past few weeks the striking spectacle had occurred at the volcano, but the first time she had witnessed it personally.

"It was quite spectacular," she told PA.


Arrow Up

Papua New Guinea's Ulawun volcano erupts again - ash column rising to colossal 63,000 ft (19.2 km)

Satellite image of Ulawun volcano
© Copernicus EMS @CopernicusEMS / twitter
Satellite image of Ulawun today

Another high-level eruption took place at Ulawun volcano at 10:30 UTC, Aug 03. It follows the ejection to 63,000 feet (19.2km) on June 26 which was the world's first full-scale subplinian eruption since Calbuco, Chile in 2015, which ranked as a VEI 4.


A repeat of that June 26 eruption has just taken place (Aug 03), firing another colossal ash column to 63,000 feet (19.2 km) a.s.l. and comfortably into the stratosphere, according to the Volcanic Ash Advisory Center (VAAC) Darwin,

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

This large eruption was preceded by two smaller, though still significant puffs, on Aug 03 — one to 25,000 feet (7.6 km) and the other to 50,000 feet (15.2km). While two powerful ejections have occurred since the 'big one' — both to an estimated 45,000 feet (13.7 km) a.s.l.

This latest eruptive activity looks set to be at least as big as 2000's eruption, which ranked as a VEI 4.

Satellite imagery shows a large circular cloud over the volcano:


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Fire

Water discovered in Hawaii's Kilauea volcano could trigger explosive eruptions


Kilauea
© S. Conway/U.S. Geological Survey Hawaiian Volcano Observatory via AP
In this Thursday, Aug. 1, 2019, aerial photo, a small pond of green water is seen at the lowest point of Kilauea volcano's Halemaʻumaʻu Crater in Hawaii Volcanoes National Park in Hawaii. The discovery is the first time water has been observed in the Big Island crater in recorded history. When lava interacts with water it can cause explosive eruptions, but scientists say it's too soon to know if the pond will cause a violent reaction.
For the first time in recorded history, a pond of water has been discovered inside the summit crater of Hawaii's Kilauea volcano, a development that could signal a shift to a more explosive phase of future eruptions.

After a week of questions about a mysterious green patch at the bottom of the volcano's Halemaumau crater, the former home of a famed lava lake, researchers confirmed the presence of water on Thursday, officials with the U.S. Geological Survey told The Associated Press on Friday.

"The question is what does this mean in the evolution of the volcano?" USGS scientist emeritus Don Swanson said.

Halemaumau has never had water since written observations began, he said, so the pond is unusual.

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Attention

Volcano filmed erupting on the northern Kurile Islands, Russia

volcano
During our pilot expedition to the northern Kurile Islands, we observed the volcano during 16-20 and 26-27 July 2019: Ebeko's northern crater was very active, almost constantly degassing and producing ash-rich eruptions at irregular intervals of typically few hours.

About half of them consisted in small to moderate, but passive ash venting, while the others were explosions that generated ash plumes of typically 1-2 km height and drifting / slowly dissipating rather long distances (few tens of km) mostly towards the NW.


Attention

Popocatepetl (aka Popo) volcano erupts in Mexico

Popocatepetl  volcano

Popocatepetl volcano
Mexico's disaster prevention agency (CENAPRED) said over 100 explosions, carrying water vapor, gas, and light amount of ashes emanated from Mexico's Popocatepetl stratovolcano.

The agency's systems also recorded 5 moderate explosions on Tuesday.

These last two emitted incandescent fragments on the northeast slope.


Attention

Eurasia's biggest volcano spews 5 km-high plume of ash in Kamchatka, Russia

volcano
The ash cloud spread nearly 10 km to the south of the volcano, the Kamchatka Volcanic Eruption Response Team said

Klyuchevskoy, the tallest active volcano in Eurasia, located in Kamchatka, in the Russian Far East, has spewed ash as high as 5.5 km above sea level, the Kamchatka Volcanic Eruption Response Team (KVERT) said on Thursday.

"On August 1, the Klyuchevskoy volcano belched ash. The column of ash rose 5,500 meters above sea level.

The ash cloud spread nearly 10 km to the south of the volcano," KVERT said.


Attention

Indonesia issues flight warning as volcano erupts on Sumatra Island

Mount Kerinci volcano

Mount Kerinci volcano
Indonesian authorities issued a flight warning as Mount Kerinci volcano in Sumatra Island erupted on Wednesday, a statement from the energy and mineral resources ministry said.

The volcano erupted at 12:48 p.m. Jakarta time (0548 GMT), spewing a column of ash up to 0.8 km into the air. The volcanic ash tended to spread to the northeast and east of the crater.


Attention

Volcano eruption in Japan on July 26

Mt. Aso
© Japan Meteorological Agency
Mt. Aso
A small eruption was observed Friday on Mt. Aso in southwestern Japan, spewing smoke as high as 1,600 meters, the weather agency said. The eruption occurred at 7:57 a.m. at the No. 1 crater of Mt. Aso's Nakadake, which is 1,506 meters above sea level, according to the Japan Meteorological Agency.

There were no immediate reports of injuries. It was the latest in a series of small-scale eruptions at the volcano in Kumamoto Prefecture since April. No volcanic cinders were detected but the agency warned of volcanic gas.

The agency raised Mt. Aso's volcanic alert level to 2 on a scale of 1 to 5 in April, urging people not to approach the crater. Local municipalities have restricted entry to areas within 1 kilometer of the crater.


Attention

Massive ash eruption on Mount Etna in Sicily, Italy

etna
An eruption occurred on Mount Etna in Sicily, Italy on Saturday morning (July 27), sending a large plume of ash into the sky.

"During the late morning a new fracture has opened on the southern flank of the southeast crater accompanied with a massive emission of ash," the filmer wrote online.


Info

Ancient apocalypses that changed the course of civilization

Volcano Hekla
© Abraham Ortelius/Wikimedia Commons
The eruption of the Icelandic volcano Hekla may have led to the collapse of multiple thriving Bronze Age societies.
Life, as they say, goes on. Until one day it doesn't. For ancient societies, without the means to predict natural disasters, destruction could often come suddenly and completely by surprise. Below are four of the most devastating natural events in recorded human history, and the societies that they wiped off the map.

The Storegga Slides

Until about 8,000 years ago, the British Isles were a peninsula, joined to mainland Europe by a strip of chalk downs, swamps, lakes and wooded hills. Today, we call this submerged world Doggerland.

Today, fishermen routinely bring up carved bone and antler tools from the Mesolithic hunter-gatherers who lived here. But by the end of the 7th millennium BC, a warming world caused sea levels to rise. The people of Doggerland must have watched with dread as their villages were swallowed up one by one. But one event would turn the slow advance of the sea into an apocalyptic terror.

The edge of the Norwegian continental shelf is an underwater cliff that runs for six hundred miles along the Atlantic Basin. And one autumn day around 6225-6170 BCE, this cliff collapsed. An estimated 770 cubic miles, or over 50 Mount Everests, of rock broke off and slid into the deep ocean. The rubble flow reached a speed of 90 mph underwater.