Volcano Calendar 2018: We're proud to present our 2018 volcano calendar: 13 different and attractive images of volcanoes, volcanic landscapes and phenomena taken during volcano tours over the past few years.
The Volcano Adventure Guide: Excellent information and background for anyone wishing to visit active volcanoes safely and enjoyably. The book presents guidelines to visiting 42 different volcanoes around the world.
Yellowstone is one of the largest known volcanoes in the world and the largest volcanic system in North America. The volcano is found above an intra-plate hot spot that has been feeding the magma chamber underneath Yellowstone for at least 2 million years.
The giant caldera is the product of large-scale collapse of the crust after 3 so-called ultra-Plinian or super-volcano eruptions - large explosive events that erupt several hundreds to few thousands of cubic km of magma. These eruptions took place 2.1, 1.3 and 0.64 million years ago.
Yellowstone is also the world's largest hydrothermal system. It contains 182 geysers, mud pools and fumaroles. The most famous feature in Yellowstone is Old Faithful Geyser.
Future super-volcano eruptions at Yellowstone? Yellowstone's magma chamber is believed to be still active and contain at least 15,000 cubic km of melt.
It cannot be ruled out, nor predicted that there will be another super-volcano eruption at Yellowstone in some (geologic) future.
In recent years, the caldera has been studied and is being monitored more closely. In recent years, Yellowstone has been showing unrest in the form of deformation, ground uplift, temperature changes, and seismic swarms, all of which have been followed with great interest and rising some concern. 70 small earthquake swarms were recorded at Yellowstone volcano between 1983 and 2006. On the other hand, such activity is probably entirely normal for a large dormant super-volcano.
Despite the unrest, there is currently no reason to believe that these are precursors to another large super-volcano eruption to happen in the nearer future (years to decades). More likely, these are normal activities in dormant stages of large active volcanic systems. In addition, most of the activity can be related to the hydrothermal system rather than the magma chamber itself.
Statistically, even though the interval of time lapsed since the last such eruption is similar to the intervals separating the past 3 eruptions, statistical likelihood that such an event will repeat itself in the next few 100 years is very low. Unfortunately, most media reports in recent years have been exaggerating this risk greatly.
The activity at the caldera (seismicity, deformation, degassing etc) remains at normal levels. Despite continuing rumors and fear-mongering media (unsupported by facts), there is currently no sign to believe that the so-called "supervolcano" is about to erupt violently anytime soon. ...more
The USGS Yellowstone Volcano Observatory (YVO) who monitors the caldera's seismic activity, its ground deformation and other geophysical parameters very closely maintains therefore Yellowstone's current status level at "green" = "normal" - actually, the most typical state of any of the world's thousands of active volcanoes. Yellowstone's current observed activity underground and at the surface (mostly hydrothermal in nature, e.g. its hot mineral springs and geysers) falls well within this normal activity state and should not be sign of worry. [less]
A magnitude 4.8 earthquake at shallow 7 km depth occurred yesterday morning with an epicenter located 4 miles north-northeast of Norris Geyser Basin in Yellowstone National Park. It was the largest quake since 1980 and occurred near the center of a region of recent ground uplift. ...more
The event has sparked media reports that "Yellowstone might be erupting soon",- however, while this event could be a precursor to new activity, it is far from likely that this will actually happen. In addition, the next eruption at Yellowstone if it is going to occur in a foreseeable future, is most likely going to be a small event (not a supervolcano eruption!). [less]
The famous Steamboat Geyser erupted again during the past night breaking a 8 years period of dormancy. Known as the currently largest geyser in the world, its jets are known to reach up to 90 m height. ...more
It is located in the Norris Basis in the northern part of Yellowstone. Its eruptions are very irregular, with intervals ranging between several weeks (29 eruptions in 1964) to decades (record was 50 years pause with no eruption). [less]
During the month of December 2012, the University of Utah reports 101 earthquakes were located in the Yellowstone National Park region with a notable increase of earthquake swarms. ...more
The largest earthquake was a magnitude 2.6 event on December 15, 2012, at 6:25 AM MST, located about 10 miles north of Pahaska Teepee, WY. Dec. 9 through Dec. 10 a small swarm of 11 events was located 9 miles north northwest of West Yellowstone, MT with magnitudes 0.3 to 2.1. On Dec. 13 a small swarm of 12 quakes was recorded about 13 miles east of Old Faithful, YNP with magnitudes 0.3 to 2.1. Also on Dec. 13 a small swarm of 12 quakes was recorded between Lewis and Shoshone Lakes with magnitudes 1.4 to 2.5. Overall Yellowstone earthquake rates are normal for this monthly reporting period. Slow subsidence of the caldera, which began in early 2010, continues. Current deformation patterns at Yellowstone are well within historical norms. [less]
Time and depth of quakes at Yellowstone during Oct 2012
Yellowstone earthquake activity remains at background levels. ...more
During October 2012, 128 earthquakes were recorded in the Yellowstone National Park region. The largest were a pair of magnitude 3.1 events on October 14 at 8:55 PM and 9:21 PM MDT, located about 18 miles south southwest of West Yellowstone, MT. These events were part of a swarm of 55 quakes recorded October 14 -16, with magnitudes ranging from M 0.9 to M 3.1. [less]
Current seismic signal b207 station (Univ. Utah / USGS)
A small earthquake swarm occurred under the Yellowstone caldera. The quakes are few and very small and no indicator of an impending eruption. It completely falls under what is normal behavior of an active caldera.
Vulkane Italiens - order online: 88 pages, brilliant color photos, German language - this beautifully illustrated guidebook is a perfect introduction and companion for all interested in Italy's rich and varied volcanic areas.
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