background preloader

Volcanoes

Facebook Twitter

Volcanic Rocks of Lemnos. The Greek island of Lemnos is the mythic location of the forge of Hephaestus, god of blacksmiths, metallurgy, and all things fire. According to legend, Hephaestus landed here after Zeus hurled him off Mount Olympus - and although the fall was a steep one, he could hardly have touched down in a more appropriate spot. The Miocene volcanoes that used to spew lava on these shores are long gone, but they’ve left behind peculiar, entrancing rock formations. The locals call these rocks “faraklo” or “fragokefala” - “bald” or “bald heads” - references to the barren hills and tawny orbs that dot the volcanic landscape. This petrified lava is frozen in all sorts of bizarre shapes, from ripples in the rockface to built-up 3D spirals. Markedly unlike the extensive beaches and striking waterfalls that draw most tourists to the island, this site is located at the northern edge of the island, beyond the settlement of Poliochni (which is notable in itself, as the oldest Neolithic city in Europe).

Shiprock. Rising high above the surrounding desert, the rock formation known as Shiprock has long been a point of fascination. This striking volcanic plume was formed around 30 million years ago, developing as a plug within the vent of an active volcano. Over time, the rest of the volcano eroded away, leaving the jagged outcrop all alone in a vast expanse of plain. At over 1500 feet, it’s the tallest structure for miles and miles.

The structure is an epicenter of legend within the Navajo culture. Although the steep, perilous sides of the Shiprock were once considered a great prize among rockclimbers, human ascents have been expressly off-limits since 1970, in accordance with Navajo custom.

Volcanoes that changed History

North American Volcanoes. Icelandic Volcanic Activity. Volcanoes Today. Lists of volcanoes. Lists of volcanoes From Wikipedia, the free encyclopedia Jump to: navigation, search Map of Earth's plate boundaries and active volcanoes More detailed map showing volcanoes active in the last 1 million years This is a list of lists of active, domant, and extinct volcanoes sorted by country and contintent. There are separate lists of Antarctic, submarine, and extraterrestrial volcanoes. Guadeloupe[edit] São Tomé and Príncipe[edit] External links[edit] Smithsonian Institution - Global Volcanism Program Retrieved from " Categories: Navigation menu Personal tools Namespaces Variants Views Actions Navigation Interaction Tools Print/export Languages This page was last modified on 12 March 2014 at 19:37.

Timetable of major worldwide volcanic eruptions. This timeline of volcanism on Earth is a list of major volcanic eruptions of approximately at least magnitude 6 on the Volcanic Explosivity Index (VEI) or equivalent sulfur dioxide emission around the Quaternary period. Some cooled the global climate; the extent of this effect depends on the amount of sulfur dioxide emitted.[1][2] The topic in the background is an overview of the VEI and sulfur dioxide emission/ Volcanic winter relationship. Before the Holocene epoch the criteria are less strict because of scarce data availability, partly since later eruptions have destroyed the evidence. So, the known large eruptions after the Paleogene period are listed, and especially those relating to the Yellowstone hotspot, the Santorini, and the Taupo Volcanic Zone. Only some eruptions before the Neogene period are listed. Active volcanoes such as Stromboli, Mount Etna and Kilauea do not appear on this list, but some back-arc basin volcanoes that generated calderas do appear.

Since 1000 AD[edit] Volcano so devastating people ate their own shoes: ISLAND ON FIRE BY ALEXANDRA WITZE AND JEFF KANIPE. By Christopher Hudson PUBLISHED: 18:26 GMT, 20 March 2014 | UPDATED: 16:25 GMT, 25 March 2014 Sparks fly: A violent eruption in Hawaii Iceland is an unsettling country. When I was 17, I took part in an expedition across Vatnajokull, a desolate landscape of black and twisted lava. If I had been standing there in June 1783 I would have been vaporised instantly as 1000-metre fire columns spewed from a great fissure in the earth.

The Laki craters, as they became known (after Mount Laki which stands at the centre) would erupt for eight months, poisoning half of Iceland’s livestock and killing tens of thousands of people, causing a caustic fog that would smother Europe. Iceland is not a major player in the league of volcanic eruptions. More feared is its neighbour, Katla, which usually erupts in tandem with Eyjafjallajokull, and sits under hundreds of metres of solid ice with the potential to cause catastrophic floods. Devastating result: The craters below Mount Laki. Watch a volcano exploding: Amazing 360 degree interactive panorama shows eruption on the remote Kamchatka peninsula. Russian team creates incredible interactive panorama of the Plosky Tolbachik volcano in the Russian Far EastIt is one of four volcanoes simultaneously erupting on the Kamchatka peninsulaShot from variety of locations, the incredible panorama can be zoomed and panned like Google Street View By Damien Gayle Published: 14:39 GMT, 1 February 2013 | Updated: 17:39 GMT, 1 February 2013 This is the moment a volcano erupted in the snowy wastes of Russia's remote far east.

The stunning pictures were captured by a Russian film crew who swooped across in a helicopter and braved roasting hot pyroclastic flows on the ground to create an immersive, interactive panorama. Plosky Tolbachik is one of four volcanoes, all within 110 miles of each other, that have been active simultaneously on the peninsula in Russia's far east since late November. Scroll down to try the incredible panorama for yourself 'The Tolbachik volcano eruption is classified as an unconventional fissure eruption. Decade Volcanoes.

Map of the 16 Decade Volcanoes. The Decade Volcanoes are 16 volcanoes identified by the International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI) as being worthy of particular study in light of their history of large, destructive eruptions and proximity to populated areas. The Decade Volcanoes project encourages studies and public-awareness activities at these volcanoes, with the aim of achieving a better understanding of the volcanoes and the dangers they present, and thus being able to reduce the severity of natural disasters. They are named Decade Volcanoes because the project was initiated as part of the United Nations–sponsored International Decade for Natural Disaster Reduction—not, as sometimes believed, because they erupt approximately every ten years. Aims of the program[edit] Funding[edit] Achievements[edit] Since it was initiated, the Decade Volcano program has achieved a number of successes in predicting volcanic events and mitigating disasters.

Andean "Sombrero" Uplift Due To Magma. October 12, 2012 Radar data from ERS-1, -2 and Envisat show a central uplift of about 10 mm per year near the Uturuncu volcano (dark red). The surrounding region shows a slower subsidence at a rate of about 2 mm per year (blue). Data were acquired 1992–2010. Scientists refer to the deformation pattern as the ‘sombrero uplift’. Credit: Y. Fialko, SIO/UCSD Brett Smith for redOrbit.com – Your Universe Online Geophysicists at University of California, San Diego (UCSD) have identified a unique phenomenon in Altiplano-Puna plateau, located in the central Andes near the borders of Bolivia, Chile and Argentina. Magma underneath the Earth´s crust is forcing the ground up in one spot, and at the same time sinking the ground around it. “It’s a subtle motion, pushing up little by little every day, but it’s this persistence that makes this uplift unusual. Using satellite data from European Remote Sensing (ERS) and Envisat missions, the geophysicists were able to study the uplift in great detail.

Volcanic Eruption Trigger Identified. October 13, 2012 Lee Rannals for redOrbit.com — Your Universe Online Scientists have identified a trigger for the largest explosive volcanic eruptions on Earth, according to a report published in the journal Scientific Reports. University of Southampton researchers investigated crystal cumulate nodules and their trapped magma to see what caused eruptions at the Las Cañadas volcanic caldera on Tenerife, in the Canary Islands. This volcano has generated at least eight major eruptions during the last 700,000 years, which have resulted in eruption columns of over 15 miles high, and have expelled widespread pyroclastic material over 80 miles.

By analyzing crystal cumulate nodules discovered in pryclastic deposits in major eruptions, they found that pre-eruptive mixing within the magma chamber appears to be the repeating trigger in large-scale eruptions. He said stirring young hot magma into colder, cooler magma appears to be a common event before these explosive eruptions. Volcano Photos, Information and Stories.