Showing posts with label Volcanism. Show all posts
Showing posts with label Volcanism. Show all posts

Wednesday, November 1, 2017

Iceland"s Biggest Volcano Is "Ready To Erupt" As Europe Faces A Disaster

Authored by Mac Slavo via SHTFplan.com,


Iceland’s biggest volcano has been rocked by the strongest earthquake since it last erupted in 2014.



With swarms of earthquakes occurring in the French Alps too, Europe is facing what could be one of the largest natural disasters in history.


Last week, the 6,591-foot tall Bardarbunga, a “powerful and versatile” volcano, was rattled by the four largest earthquakes since it last erupted in 2014.  The earthquakes, measuring in magnitudes of 3.9, 3.2, 4.7, and 4.7 on the Richter scale, struck the caldera region over several days last weekend. Another magnitude 4.1 earthquake hit the 200km long and 25km wide volcanic system earlier last week and several tremors struck in September.


Páll Einarsson, a volcanology expert at the University of Iceland, said the latest quakes are part of a series that have been “in progress for two years”. Speaking exclusively to Daily Star Online, he said the volcano is “clearly preparing for its next eruption” within the next few years.


Fears are spiking even higher when considering the earthquake swarm that has been rocking the French Alps recently.


The 10,000-year-old volcano spewed out large volumes of sulfur dioxide during its last seven-month eruption which took place between August of 2014 and February of 2015. Although the eruption did not disrupt any flights, the emissions harshly impacted the air quality in Iceland, leading to health consequences across the country.


In spite of describing the volcanoes activity as “high”, the Icelandic Met Office has yet to issue any warnings about the possibility of Bardarbunga’s eruption. In fact, the warning code remains green; meaning the volcano is in a normal, non-eruptive state, according to the volcano monitor.


Seven years ago Iceland’s massive Eyjafjallajökull volcano erupted, spewing a choking veil of ash across Europe. Residents worry as memories of the 2014 eruption and the flight chaos caused by the 2010 eruption of the Eyjafjallajökull volcano resurface. 



The deadly volcanic dust wiped out skies and grounded 100,000 flights, resulting in the economy losing £4 billion.



Should an eruption of Bardarbunga take place, it’s highly possible that there would be another even more drastic air travel restriction and poorer air quality.










Thursday, October 26, 2017

Volcano Experts To Monitor Canary Islands After Hundreds Of Earthquakes Recorded

Authored by Mac Slavo via SHTFplan.com,


It certainly seems like volcanoes are erupting all over the world right now, and the newest region to attract scientists’ attention, is the Canary Islands. 



After hundreds of mini-earthquakes were this week, experts were called in to monitor a potential eruption.


According to The Daily Mail UK, the situation could quickly become volatile. Seismic experts have been called in to carry out tests on the Canary Island of La Palma after fears that an active volcano may erupt. Hundreds of mini-earthquakes have been recorded on the island in the past few weeks, and scientists are now monitoring the seismic activity on La Palma 24 hours-a-day. Tests will be carried out on the slopes of the island’s active volcano, Cumbre Vieja, to attempt to calculate any potential risk of an eruption.



Cumbre Vieja, on the volcanic ocean island of La Palma, near Tenerife, last erupted in 1971. But the hundreds of mini-earthquakes are prompting fears that it could go again – and soon. A slew of tiny tremors beneath the volcano’s surface in just a matter of hours this week have reportedly caused lava to rise up from beneath. Scientists will sample underground water, measure PH levels, conductivity, temperature, and radon dissolved gas activity, according to The Express. 


All of this new testing was launched as a “hydrogeochemical monitoring program,”  will see tests conducted three times a week at four different points on the volcano. The 350 mini-earthquakes have prompted scientists to probe deeper into the volcanoes eruption potential. The National Geographic Institute (NGI) notes that a team is to be sent to La Palma to carry out CO2 profiles and structural studies of Cumbre Vieja.


A majority of the tremors were so small, that they could not be detected by scientists and were not felt by any residents on La Palma. Between October 6 and 7, more than 40 tremors were recorded, with the most powerful hitting 2.7 on the Richter scale and located at a depth of 17.4 miles.  A few days without any tremors followed. Then, between October 10 and 13, seismographers on La Palma picked up another swarm of tremors, taking the total to 352 in just ten days. On October 13 alone, some 44 quakes were recorded at depths of between 9.3miles and 13.6miles, the most powerful at 2.1 on the Richter scale.


In a report published on Saturday, the NGI adds that one of the reasons for the high number of tremors could be the three new monitoring stations in the area.


The Director of the National Geographic Institute, María José Blanco, told Canarias7 that while "seismic swarms" are nmot abnormal, she added that they had "never recorded a similar swarm" since monitoring began.









Sunday, July 9, 2017

"Ready To Blow" - National Geographic's Guide To The Yellowstone Supervolcano

Amid a growing "swarm" of over earthquakes (now over 1000), and Montana"s largest quake ever, scientists are growing increasingly concerned that the so-called "super-volcano" at the heart of Yellowstone National Park could be building towards a Category 7 eruption. So what is a "super-volcano" and what does its explosion mean for life on earth? NatGeo explains...



As National Geographic details...


Think of Yellowstone as a gigantic pressure cooker, fueled by a massive supervolcano. Water from rain and snowmelt, much of it centuries-old, percolates through cracks in the Earth’s crust until heated by molten rock reservoirs deep below. The water then filters upward, eventually finding release in the thousands of geysers, hot springs, and other hydrothermal wonders.



Eruptions of this supervolcano expel so much material that the crust caves in, creating a craterlike depression called a caldera.


Yellowstone is known as a supervolcano because of the violence and size of its explosions.



The plume of hot rock has been calculated at more than 600 miles deep. But scientists suspect it actually descends as far as 1,800 miles, all the way to what’s known as the Earth’s outer core-mantle boundary.



The reservoirs and plume are superheated, spongelike rock holding pockets of molten material called magma. The reservoirs’ heat, which originates in the plume, is what keeps the area’s geysers boiling.



Ancient rain and snowmelt seep down to just above the volcano’s magma reservoirs, until they are superheated and rise again through the fractures. Volcanic heat and gases help propel steam and water toward the surface, where they escape through hot springs or geysers.



Hot water rises from a deep reservoir into a teapot-shaped chamber. As water and gases fill the sealed space, pressure builds, preventing boiling. Some water spills into the spout, releasing pressure and allowing the water in the chamber to boil. Steam and water then blast up the spout.



Pressure builds behind a narrow constriction until steam shoots through. Some water splashes out, then jets of steam and water explode, rising on average 130 feet. As the chamber drains, pressure drops, and the process begins again.


  • Highest recorded eruption - 184ft

  • Eruptions per day on average - 17

  • Minutes length of eruption - 1.5 to 5

The park’s hydrothermal features cluster in basins at the margins of lava flows or near faults. Rivers and streams are heated as they pass through these basins. Heat and escaping gases are also evidence of the subterranean forces that lie below Yellowstone.



So how would a supervolcanic eruption at Yellowstone impact the regional ecosystem, and the US more broadly? Well, as The American Dream blog"s Michael Snyder points out, it would be nothing short of catastrophic.


Hundreds of cubic miles of ash, rock and lava would be blasted into the atmosphere, and this would likely plunge much of the northern hemisphere into several days of complete darkness. Virtually everything within 100 miles of Yellowstone would be immediately killed, but a much more cruel fate would befall those living in major cities outside of the immediate blast zone such as Salt Lake City and Denver.



Hot volcanic ash, rock and dust would rain down on those cities literally for weeks. In the end, it would be extremely difficult for anyone living in those communities to survive. In fact, it has been estimated that 90 percent of all people living within 600 miles of Yellowstone would be killed.


Experts project that such an eruption would dump a layer of volcanic ash that is at least 10 feet deep up to 1,000 miles away, and approximately two-thirds of the United States would suddenly become uninhabitable. The volcanic ash would severely contaminate most of our water supplies, and growing food in the middle of the country would become next to impossible.


In other words, it would be the end of our country as we know it today.


The rest of the planet, and this would especially be true for the northern hemisphere, would experience what is known as a “nuclear winter”. An extreme period of “global cooling” would take place, and temperatures around the world would fall by up to 20 degrees. Crops would fail all over the planet, and severe famine would sweep the globe.


In the end, billions could die.


So yes, this is a threat that we should take seriously.