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Thu, 24 May 2018
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Volcanoes

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Volcanic thunder recorded for the first time

This satellite image shows Bogoslof volcano erupting on May 28, 2017.
© Dave Schneider/Alaska Volcano Observatory & U.S. Geological Survey
This satellite image shows Bogoslof volcano erupting on May 28, 2017.
It's an explosion that starts within the earth, a release of pressurized gases and bits of rock; either as sharp shards or molten fragments or both. A volcanic eruption is one of the most powerful demonstrations of the dynamism of the planet that we usually think of as solid and unyielding.

It's also loud. Really, really loud. Underwater eruptions can sound like gunshots or bombs reverberating through the water. Looking for a single, ephemeral sound within all that noise of tons of lava and gas and ash and rock all getting slammed out of the Earth's crust is like listening for a whisper in a thunderstorm.

Or like, you know, listening for thunder in the middle of a volcanic eruption. That's exactly what some researchers managed to record during eruptions of Alaska's Bogoslof volcano last year.

They noticed that cracks and pops in the recordings lined up with the timing of volcanic lightning in the same area. Volcanic lightning occurs when eruptions that send a lot of ash into the atmosphere. During their speed run into the air, the ash particles rub against each other, creating an electric charge a lot like when you rub a balloon against your hair. As the particles spread out, that electric charge discharges into lightning....and apparently, thunder.

Bizarro Earth

Giant 3 km long earth crack in Kenya blamed on 'volcanic activity'

Kenya earth crack
© YouTube/Daily Nation (screen capture)
A section of the collapsed Maai Mahiu-Narok road near Karima in Kenya.
Hundreds of travelers were stranded for hours on the Narok - Mai Mahiu road at Karima in Kenya on Tuesday 13th March 2018, after a section of the road collapsed. The giant earth crack responsible is estimated to be 3 kilometers long and at least 6 meters deep and was initially blamed solely on flood waters caused by torrential rains that have left at least nine people dead across the country.

However the Kenya National Highway Authority (KENHA) Director General Engineer Peter Mundinia has rubbished such reports and stated that the road collapse was a result of volcanic activity in the area.
"The Mai Mahiu road was damaged as a result of volcanic activity. We can say rains catalyzed the destruction. However nobody can tell why the volcanic activity happened in that manner. If the development was caused by water alone, then we would have seen the road cut, but not the extent of this fault line. As you aware Suswa is in the Rift Valley and volcanic activities are still taking place in Suswa. We cannot be sure that tomorrow volcanic activities will take place in Suswa, it could be somewhere else."

Attention

Tremor swarm at Yellowstone continues - began in February

CC BY 2.0 / Michael McCarthy / Yellowstone-4193
© CC BY 2.0 / Michael McCarthy / Yellowstone-4193
Yellowstone
Laying underneath the tranquil and beautiful geysers, waterfalls, and mountains of Wyoming lies the Yellowstone caldera. The supervolcano has been worrying some for decades, but now experts fear an eruption could happen soon after reporting a "spate of tremors."

According to WMD, a spate of four mini-tremors in the area following a period of "rest" has raised fears among some that the supervolcano is about to blow. Although the Yellowstone supervolcano hasn't erupted for 631,000 years, scientists have been diligently working to understand the last eruption so they can more accurately predict when a big one will happen again.

The most recent quake came on March 11 when a small 1.5 tremor took place beneath the surface. The strongest one, a 1.8 magnitude earthquake, came just hours before this, and people are concerned that Yellowstone could be about to blow.

Comment: See Also:


Snowflake Cold

Yale's Two Climate Bombs Point to Impending Ice Age

Beaufort gyre
Let's just assume humans are melting the arctic: it is only at a faster pace than what happens every cycle, and somehow leads to an ice age.

They keep talking about runaway warming but that isn't what Earth does. This video was an attempt to use ONLY the mainstream science and demonstrate that you don't need to be a conspiracy theorist or a "denier" to believe cooling is coming... you just need to believe in mainstream science :)

Isn't that even more fun than doing it the usual way?


Attention

Grenada increases alert level for underwater volcano Kick 'Em Jenny

Kick 'Em Jenny volcano
© Wiki
A sonar image of the Kick 'Em Jenny volcano.
The National Disaster Management Agency (NaDMA) Monday said it had raised the alert level for the underwater volcano, Kick 'em Jenny from yellow to orange "due to increased activities".

NaDMA said that it had been working with the Trinidad-based Seismic Research Centre (SRC) of the University of the West Indies (UWI) in monitoring the situation and "with this increase in the alert level, ships and other marine operators are asked to observe the exclusion zone of 5 km/3.1miles".

"NaDMA in collaboration with the University of the West Indies Seismic Research Center will continue to monitor the activities of Kick em' Jenny and will update the public as necessary, the statement noted.

In May last year, NaDMA warned Grenadians that they should expect more eruptions of the underwater volcano, noting that volcanic episodes at Kick em' Jenny, since 1939, usually consist of several eruptions lasting over several days before returning to repose.

NaDMA said it would be useful for those in coastal areas to be on the lookout for unusual material that might be ejected from the eruption.

Bizarro Earth

When mountains awaken: A history of US non-volcano eruptions

volcanoes great smoky mountains


Please Note: This list is a companion list to the
Cascade Range Historical Newspaper Clippings, and features "non-volcano eruptions".

Pigeon mountain georgia volcano news clipping

June 20, 1857

Pigeon Mountain volcano, Georgia
The New York Times, June 20, 1857

A Volcano in Georgia.
A writer in the Sentinel states that a volcano has lately made its appearance in Pigeon mountain, about ten miles from Augusta. On the 24th, ult., the mountain was violently agitated, and the citizens in the vicinity were aroused and terribly frightened by the commotion. When observing the mountain they were more than ever terrified, for a brilliant light was plainly seen issuing from the summit. The atmosphere soon became strongly impregnated with a disagreeable sulphuric odor. On the following day a thick torrent of smoke and ashes ascended from where this light was previously seen. No blaze has yet been seen to issue from the crater. It had continued up to the 29th ultimo about as above described, emitting smoke and ashes without intermission. The crater is thought to be about 100 yards in diameter. No one has yet ventured near enough to ascertain anything of its general depth.

Several springs in the vicinity have totally disappeared. Many of the citizens are very much alarmed, and some even are moving out of the valley, through anticipation and fear of a violent eruption. The writer states that the principle of a volcano has for many years been germinating in Pigeon mountain. About ten miles south from where the present appeared, is the crater of an extinguished volcano, which appears to have been in an active state at no very distant period.

Every appearance goes to vindicate the conjecture that it has been in a state of eruption within less than five hundred years. Several persons of credit have stated that in the Winter of '48 or '49, the earth in the vicinity was in a remarkabley warm state. Others have avowed to have seen smoke with a sulphuric smell issue from a very remarkable cavity which is found in the neighborhood of the place.

-- Newspaper Source found at: The New York Times Archives, 2008

Attention

Rapid earthquakes spark fears of fiery eruption at Mount Etna, Italy

etna
Mount Etna, one of the word's most active volcanoes, sparked fears of a fiery eruption on Thursday after a rapid succession of powerful tremors rocked the fiery mountain.

Residents of the ancient city of Catania on the eastern shores of Sicily were struck with panic after several shocks reverberated through Etna in just five minutes of each other.

The terrifying Etna which only sits 18miles from the coastal town, was rocked by three shallow tremors on its southern slopes.

The National Institute of Geophysics and Volcanology (INGV) of Catania recorded the shocks in the early morning hours.

Attention

Lava flow confirmed at Shinmoe volcano in Japan following eruptions

Mount Shinmoe is seen from a Mainichi Shimbun helicopter on March 9, 2018.
© Mainichi
Mount Shinmoe is seen from a Mainichi Shimbun helicopter on March 9, 2018.
A flow of lava has been confirmed at Mount Shinmoe in south Kyushu, following a series of eruptions starting earlier this month, the Japan Meteorological Agency (JMA) said on March 9.

At around 10:10 a.m. on March 9, a worker from the National Institute of Advanced Industrial Science and Technology involved in an on-site inspection informed the JMA that lava could be seen flowing from the northwest section of the mountain's crater. The agency later confirmed a lava flow, and is investigating its range.

The JMA had announced on the same day that eruptions of the volcano, which straddles Miyazaki and Kagoshima prefectures, had stopped at 1:45 a.m., but it seems that lava built up inside the crater subsequently spilled over.

Comment: See also: Shinmoedake volcano in Japan rumbles anew with explosive eruption


Fire

Volcanologists warn world is unprepared for next major eruption

The eruption of Mount St Helens in 1980 caused the deaths of 57 people
© KPA/Zuma/REX/Shutterstock
The eruption of Mount St Helens in 1980 caused the deaths of 57 people
The world needs to do more to prepare for the next huge volcanic eruption, a team of leading scientists says.

The devastating Indian Ocean tsunami of 2004 and the Tōhoku earthquake in Japan in 2011 highlighted some of the worst-case scenarios for natural disasters. But humanity has not had to deal with a cataclysmic volcanic disaster since at least 1815, when the eruption of Tambora in Indonesia killed tens of thousands of people and led to a 'year without a summer' in Europe and North America. Such world-altering blasts rank at 7 or more on the Volcanic Explosivity Index (VEI) scale of eruptions, which goes to 8.

"The next VEI-7 eruption could occur within our lifetimes, or it could be hundreds of years down the road," says Chris Newhall, a volcanologist with the Mirisbiris Garden and Nature Center in Santo Domingo, Philippines. But the time to have this discussion is now, he says, so that researchers and government officials can plan and prepare before an emergency strikes.


Comment: See Also:


Attention

Turrialba Volcano in Costa Rica erupts with ash, gas and incandescent material

Image of the Turrialba Volcano

Image of the Turrialba Volcano
The Turrialba Volcano in Cartago, Costa Rica had for the past weeks presented a diminished seismic activity and also a decreased degassification; however, the volcano raised its voice again this March 7th when it entered an strombolian eruption phase (relatively mild blasts).

The phase which began at 00:00 hours included the emission of gases, ashes and incandescent fragments of fresh lava which lasted through the first hours of the morning of this Wednesday.

According to Dr. Mauricio Mora from the National Seismology Network, a volcanic tremor (signal generated by the flow of fluids, water, gas of magma through the interior conducts of the volcano) was registered along with the activity.