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Earthquakes and/or Volcanoes

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Re: Earthquakes and/or Volcanoes

#151

Post by Volkonski »

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Re: Earthquakes and/or Volcanoes

#152

Post by RTH10260 »

more,

i understand that several days ago a fissure opened in the side of the volcano and these images mainly show the lave spill from there


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Re: Earthquakes and/or Volcanoes

#153

Post by Volkonski »


Volcanologists on Thursday said they discovered a "lava tsunami" rapidly flowing from the Cumbre Vieja volcano on the Spanish island of La Palma. Cumbre Vieja started erupting nearly a month ago, forcing the evacuation of thousands of people as lava has made its way through towns and toward the Atlantic Ocean.

Video posted by the Volcanological Institute of the Canary Islands, known as INVOLCAN, shows the so-called "tsunami" racing down the volcano. The scene, the institute said, is a picture of "amazing speed and overflow of the lava channel."

:snippity: :snippity:

As of Thursday, the lava has spread to 674 hectares, more than 1,665 acres, according to the European Commission's Emergency Response Coordination Centre. Since the eruption started on September 19, 6,800 people have been evacuated, and 1,548 buildings have been destroyed.

Other videos posted by INVOLCAN show several feet of lava — with layers of black rocks surrounding a steaming orange and red core — slowly moving down neighborhoods, covering streets and swallowing objects that are in its path.
https://www.cbsnews.com/news/cumbre-vie ... =135995898
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Re: Earthquakes and/or Volcanoes

#154

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Re: Earthquakes and/or Volcanoes

#155

Post by Volkonski »



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Re: Earthquakes and/or Volcanoes

#156

Post by Lani »

So far, the new lava activity is confined within Halemaʻumaʻu crater.
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Re: Earthquakes and/or Volcanoes

#157

Post by Volkonski »

Lani wrote: Wed Oct 20, 2021 4:31 pm So far, the new lava activity is confined within Halemaʻumaʻu crater.
Hope that remains the case. :thumbsup:
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Re: Earthquakes and/or Volcanoes

#158

Post by AndyinPA »

Image

La Palma
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Re: Earthquakes and/or Volcanoes

#159

Post by Foggy »

:shock:
Out from under. :thumbsup:
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Re: Earthquakes and/or Volcanoes

#160

Post by RTH10260 »

Fifth vent opens up on La Palma volcano, increasing lava flow
Seismic activity on the Canary Island has also increased ‘notably,’ with more than 80 quakes recorded since Sunday

GUILLERMO VEGA
Los Llanos de Aridane - 25 OCT 2021-08:53 UTC

A fifth vent opened up on Sunday on the new volcano on La Palma, in Spain’s Canary Islands. According to volcanologist Rubén López, from the National Geographic Institute (IGN), the volcano – which has been erupting since September 19 – now has three vents inside the main cone and two more on its western side.

Due to the opening of the new vent, the amount of magma reaching the surface increased, leading the lava to overflow Sunday afternoon. The volcanic cone on Saturday also began to emit lava – before then it had only been spewing out pyroclastic material. Miguel Ángel Morcuende, the technical director of the Canaries Volcano Risk Prevention Plan (Pevolca), which is managing the crisis, explained that this “is an important fact because in the end there is a redistribution of magma to other points.”


https://english.elpais.com/spain/2021-1 ... -flow.html#
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Re: Earthquakes and/or Volcanoes

#161

Post by RTH10260 »

Noticia - El suelo de La Palma se eleva más de 16 centímetros
26 Oct 2021

Malaga 24h

La isla de La Palma se ha elevado más de 16 centímetros en las últimas 24 horas. Así lo constatan las estaciones de la red geodésica instaladas allí que han detectado una deformación del suelo hacia el sur, en la estación más próxima a los centros eruptivos del volcán. Así lo ha informado el Instituto Geográfico Nacional (IGN). El tremor volcánico, o para que nos entendamos, las vibraciones que provoca el flujo de lava en el interior de la tierra, se mantiene en niveles medio altos, con ciertos puntos de intensificación. Eso es el resultado de 38 días de actividad de un volcán que ha cambiado de fases en múltiples ocasiones y que está modificando el terreno no sólo con las coladas magmáticas sino con la fuerza de la lava al salir del cono, creando, ocasiones, derrumbes de grandes trozos de tierra. Eso es lo que está ocurriendo ahora mismo bajo el suelo. En el aire, la nube de dióxido de azufre alcanza este martes los 2.000 metros de altura pero no preocupa la calidad del aire por el momento.

English:

The island of La Palma has risen more than 16 centimeters in the last 24 hours.

This is confirmed by the geodesic network stations installed there, which have detected a deformation of the ground towards the south, at the station closest to the eruptive centers of the volcano. This has been reported by the National Geographic Institute (IGN). The volcanic tremor, or for us to understand, the vibrations caused by the lava flow inside the earth, remains at medium-high levels, with certain points of intensification. This is the result of 38 days of activity of a volcano that has changed phases on multiple occasions and that is modifying the terrain not only with magmatic flows but with the force of the lava as it exits the cone, sometimes creating collapses of large chunks of land. That is what is happening right now under the ground. In the air, the sulfur dioxide cloud reaches 2,000 meters in height this Tuesday but does not worry about air quality at the moment.
https:// www.youtube.com/watch?v=9cTER3rvXyI
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Re: Earthquakes and/or Volcanoes

#162

Post by AndyinPA »

Wow!
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Re: Earthquakes and/or Volcanoes

#163

Post by MN-Skeptic »

It's amazing to watch the video of the whole area covered with a thick layer of ashes. :eek:

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Re: Earthquakes and/or Volcanoes

#164

Post by Tiredretiredlawyer »

Gray snow.
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Re: Earthquakes and/or Volcanoes

#165

Post by RTH10260 »

first clip show nicely the several vents (iirc now 5)

as for the second clip, in two thousand years archaeologist will dig the city out again and wonder about all the implements they discover after aliens removed the inhabitants.... :twisted:
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Re: Earthquakes and/or Volcanoes

#166

Post by RTH10260 »

When Kilauea Erupted, a New Volcanic Playbook Was Written
Scientists learned lessons from the 2018 outburst on the island of Hawaii that are changing how responders prepare for eruptions in other places.

By Robin George Andrews
Nov. 9, 2021

Sign up for Science Times Get stories that capture the wonders of nature, the cosmos and the human body. Get it sent to your inbox.
Back in the summer of 2018, Wendy Stovall stood and stared into the heart of an inferno.

Hawaii’s Kilauea volcano had been continuously erupting in one form or another since 1983. But from May to August, the volcano produced its magnum opus, unleashing 320,000 Olympic-size swimming pools’ worth of molten rock from its eastern flank.

Dr. Stovall, the deputy scientist-in-charge at the U.S. Geological Survey’s Yellowstone Volcano Observatory, recalls moments of being awe-struck by the eruption’s incandescence: lava fountains roaring like jet engines, painting the inky blue sky in crimson hues. But these briefly exhilarating moments were overwhelmed by sadness. The people of Hawaii would suffer hundreds of millions of dollars in economic damage. The lava bulldozed around 700 homes. Thousands of lives were upended. Even the headquarters of the Hawaiian Volcano Observatory itself, sitting atop the volcano, was torn apart by earthquakes early in the crisis.

Like many volcanologists who were there during the eruption, Dr. Stovall is still processing the trauma she witnessed. Sadness is not quite the right word to describe what she feels, she said: “Maybe it’s an emotion that I don’t even have a word for.”

But not only trauma has resulted from the crisis: It has also produced something of a sea change in the way scientists and their emergency services partners are able to respond to volcanic emergencies.



https://www.nytimes.com/2021/11/09/scie ... ption.html
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Re: Earthquakes and/or Volcanoes

#167

Post by Volkonski »

Residents evacuated from Italian island Vulcano over carbon dioxide levels

https://www.cnn.com/2021/11/21/europe/i ... e=twcnnbrk

Carbon dioxide levels around the volcanic island of Vulcano in the Aeolian archipelago off the north coast of Sicily have risen from 80 tons to
480 tons, effectively reducing the amount of oxygen in the air, according to the Italian National Institute for Geophysics and Volcanology (INGV).

The gas levels started rising noticeably on October 21, when residents started reporting trouble breathing and health issues with their pets, which are often affected by decreased oxygen levels before humans.

Marco Giorgianni, the mayor of Lipari, which includes all seven of the islands in the Aeolian archipelago, signed an ordinance ordering the evacuation of the port area and designating a "red zone" where non-researchers or non-civil protection officials are prohibited from staying.

:snippity:

The ordinance also prohibits all non-resident visitors and tourists from the island for one month.
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Re: Earthquakes and/or Volcanoes

#168

Post by RTH10260 »

Didn't recall that name of for an island. Google tells me it's part of the Aeolian Islands just north oy Sicily. Part of an active fault and islands have ongoing volcanic activity. Stromboli is the name of the most memorable active volcano in the region.

https://www.volcanodiscovery.com/vulcano.html
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Re: Earthquakes and/or Volcanoes

#169

Post by MN-Skeptic »




:eek:
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Re: Earthquakes and/or Volcanoes

#170

Post by Volkonski »

Indonesia Semeru volcanic eruption kills 14; dozens injured

https://www.reuters.com/world/asia-paci ... 021-12-05/
The eruption of Semeru volcano has killed at least 14 people and injured dozens on Java island, Indonesia's disaster agency said on Sunday, as rescue teams searched for victims under layers of ash, sometimes digging with their bare hands.

Semeru, the tallest mountain on Java, threw up towers of ash and hot clouds on Saturday that blanketed nearby villages in East Java province and sent people fleeing in panic.

The eruption destroyed buildings and severed a strategic bridge connecting two areas in the nearby district of Lumajang with the city of Malang, authorities said.

A BNPB official said in a news conference late on Sunday that 14 people had been killed, nine of whom have been identified, and 56 people suffered injuries, most of them burns.
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Re: Earthquakes and/or Volcanoes

#171

Post by Estiveo »

A two-fer: Cumbre Vieja & Semeru

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Re: Earthquakes and/or Volcanoes

#172

Post by LM K »

I live approx 350 miles away from this swarm of earthquakes and 100 miles from an active land volcano ... on the Ring of Fire.

I got a bit, well, really nervous when I read about this week's earthquakes. Thankfully, the idea of "the big one" is overdue isn't accurate.
One of North America's most active fault lines sprung to life on Tuesday after a swarm of more than 40 earthquakes -- ranging from a magnitude 3.5 to 5.8 -- rattled off the coast of Oregon, catching the attention and concern of millions in the region.

The series of quakes, which began early Tuesday morning and continued into Wednesday, were all clustered between 200-250 miles west of the coastal town of Newport, OR, far enough to be mostly undetected on land, but given the area's seismic history, it is creating quite a buzz.

"If you had asked me yesterday where on Earth would be most likely to produce a bunch of magnitude 5.0+ quakes in a single day, this would have been high on my list," Harold Tobin, Director of the Pacific Northwest Seismic Network at the University of Washington, told CNN.

The fault line responsible for the quakes is the Blanco Fracture Zone. According to an analysis by Oregon State University, it is more active than the infamous San Andreas Fault in California, having produced more than 1,500 quakes of magnitude 4.0 or greater since the 1970s.

Not all quakes are created equal

What has been most impressive about this week's quakes is the swarm has included at least 9 tremors reaching a magnitude 5.0 to 5.8, with the majority occurring at a shallow depth of only 10 km.

Fortunately, according to the US National Tsunami Warning Center, none of this week's quakes have triggered a tsunami alert.

However, the activity has heightened the concern level for some, as the region is among the most earthquake-prone areas in North America and has already produced one of the largest quakes in the continental United States on January 26, 1700. The quake occurred on the neighboring Cascadia Subduction Zone, a megathrust fault much closer to land, where the Juan de Fuca plate dives underneath the North American Plate. This fault can not only trigger devastating tsunamis but also destructive shaking.

This is not necessarily a precursor for the so-called 'big one'

Though the epicenter of this week's swarm of quakes, the Blanco Fracture Zone, is among the most seismically active in North America, it rarely leads to destructive quakes.

The fault is some 275 miles west of the Oregon coastline and about 200 miles west of the Cascadia Subduction Zone, where the largest and most destructive Northwest quakes have historically taken place.

"Blanco Fracture zone quakes are strike-slip (lateral motions of the crustal blocks on either side, rather than up-down displacement), so it is very unlikely for them to pose a tsunami threat, even if a bigger quake happened, like a magnitude 7.0 for example," Tobin told CNN.

According to seismologist Dr. Lucy Jones, there have been more than 133 quakes of magnitude 5 or greater on the Blanco Fracture Zone since 1980 and have never been followed by something on land.

"Today's quakes can be thought of as something like a main-shock and a swarm of aftershocks, the one distinction being that in this case, there's not a lot of magnitude difference among them," Tobin said.

Though this week's quakes have raised the concerns the so-called "big one" could be near, Tobin assured it is not necessarily the case.
"There's quite a lot of distance from these quakes to the Cascadia Subduction Zone," Tobin explained. "Our best current understanding of how stress transfers through the crust (and mantle) would suggest that these events don't change stress on the subduction zone appreciably."

He pointed out, although we have had a remarkable number of magnitude 5.5+ quakes in a short period of time, it is not inherently alarming but rather seismologically interesting.

A similar swarm of quakes, though not to this week's magnitude, occurred earlier this year near the Salton Sea in Southern California.
Number of earthquakes now exceeds 50.


The Blanco Fracture Zone:
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Re: Earthquakes and/or Volcanoes

#173

Post by LM K »

Holy chicken noodle soup. The number is now over 100!
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Re: Earthquakes and/or Volcanoes

#174

Post by northland10 »

Maybe Fox will help explain how it it all Biden's fault.
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Re: Earthquakes and/or Volcanoes

#175

Post by Phoenix520 »

Biden? Don’t you mean the Dead Qennedy? His thing was the Ring of Fire.
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