Sentences with phrase «of volcanic events»

The kinds of volcanic events that did actually upset atmospheric composition have not been ocurring for many tens of millions of years, I think the Decaan Traps may have been the most recent (65Myr ago).

It kinda looks like the LIA was caused by a series of volcanic events and the ~ 60 year «oscillation» inspired by more volcanic activity while the globe was recovering from the LIA.

This reminds me of the time I mixed uncorrected radiocarbon dates with corrected ones, and got a bit skewed distribution of volcanic events, though I tried to correct for observational bias on earlier and smaller eruptions.

The station temperature sets show poor sensitivity to both of these volcanic events.

These observations may have a bearing on the coincidence of volcanic events with suspected meteor craters that were the subject of Matt Kaplan's recent article (5 June, p 38).

So without any ice core evidence of a volcanic event in AD 540, a cosmic impact could be seen as the next best cause for a two stage event.

Not exact matches

A series of Cataclysmic events will take place, to mention a few, earthquakes, Yellowstone, the coming California earthquake August 9, 2011, the earth wobble, the volcanic eruptions, the oceans rising, the earth splinting open spilling lava all over, the atmosphere will be consumed killing all living things.

The first 110,000 annual layers of snow in that ice core (GISP2) have been visually counted and corroborated by two to three different and independent methods as well as by correlation with volcanic eruptions and other datable events.

«In contrast to events like hurricanes or earthquakes, volcanic unrest can last for long periods of time, and that's one reason people stop paying attention to the hazards that are looming,» said volcanologist Greg Valentine, PhD, a University at Buffalo professor of geology and director of the Center for GeoHazards Studies in the UB College of Arts and Sciences.

By contrast, volcanic eruptions occurring in the 2,000 years before that can not be dated reliably, while the dates of even older volcanic events can be determined relatively accurately using the C14 method.

And secondly, the previously undetermined traces of volcanic eruptions that could not be assigned to any particular event or volcano eruption, can now be clearly traced to their origin.

Over the course of time, this may have led to peaks in deep mantle melting and possibly to major volcanic events at the Earth's surface.

Such eruptions, which expel enormous quantities of magma, are the largest volcanic events on earth.

«As it's not possible to always successfully predict volcanic events due to the lack of complete knowledge of the signals leading to catastrophes, these results are an important new finding and ultimately we hope they will contribute to our understanding of where and when the next volcanic eruption will be.»

To date, the University of Utah has placed 30 permanent seismometers around the park to record ground shaking and monitor for earthquakes and volcanic events.

Here we are not dealing with large volcanic eruptions of the size of Pinatubo of Mount St. Helens, here we are talking about extreme events: The Toba caldera in the Sumatra subduction zone in Indonesia originated from one of the largest volcanic eruption in recent Earth history, about 74,000 years ago.

The eruption was the most deadly and economically destructive volcanic event in the history of the United States.

(The five previous extinction events all came before the evolution of Homo sapiens, apparently triggered by a cataclysmic event or combination of events, such as a fall in sea level, an asteroid impact, volcanic activity.)

Beyond human activity, tropical sea surface temperatures further back in time are affected by volcanic eruptions, changes in the intensity of sunlight and natural events like El Niño.

She offers a fascinating history of how catastrophic natural events — including the Lisbon earthquake of 1755, Iceland's Laki volcanic eruption in 1783 (SN: 2/17/15, p. 29) and Hurricane Katrina in 2005 — have shaped politics, culture and society.

Ocean chemist Philip Boyd of the University of Otago in New Zealand says many other researchers have tried to link an infusion of iron from volcanic ash or even dust storms to plankton blooms, but this study is the first to «verify such a massive event.»

The finding supports previous research suggesting that colossal volcanic eruptions in what's now Siberia, about 300,000 years before the onset of the extinction event, probably triggered the die - off of nearly all marine species and two - thirds of species living on land (SN: 9/19/15, p. 10).

Volcanic eruptions are some of the most violent events on Earth... but seen from space, they take on an eerie and forbidding beauty.

Only a subset of glaciologists have focused on the potential of seismology to inform their research, while the vast majority of seismologists are focused on tectonic and volcanic events.

The researchers were able to show a recurring close timing between such events and the dates of major volcanic eruptions.

Over the history of the planet, there have been many sudden peaks in CO2 related to volcanic eruptions, releases from hydrothermal vents, and other natural events.

Nutrient - rich ash from an enormous flare - up of volcanic eruptions toward the end of the dinosaurs» reign kicked off a chain of events that led to the formation of shale gas and oil fields from Texas to Montana.

You'd love to actually find evidence of that event in the geological record, but on Earth the early record was destroyed by volcanic and tectonic processes.

Infrasound signals can remain strong as they travel over large distances, making them useful for pinpointing the location and size of events such as nuclear explosions, meteorite strikes, volcanic eruptions and sometimes earthquake ruptures.

These datasets will be used to improve strategic and hazard - warning capabilities of events in near real - time, such as tracking plumes from dust storms, volcanic eruptions, and wildfires.

That sudden beginning, when it takes place on the slopes of a volcanic island, creates concern about a possible catastrophic flank event.

Following the discovery of volcanic rocks of the same age as the extinction, volcanic carbon dioxide (CO2) emissions had previously been suggested as an important contributor to this extinction event.

This further evidence of episodic emissions of volcanic CO2 as the likely driver of the extinction enhances our understanding of this event, and potentially of other climate change episodes in Earth's history.»

The predominance of plants adapted to drier conditions after the extinction event is consistent with the gradual aridification of the North American continent due to the uplift of the Cordilleran volcanic mountain range and the probable northward shift of North America through plate tectonics.

«Most of these events have been blamed, at various times, on volcanic eruptions and asteroids impacts.

Hacker, who studies catastrophic geological events, said the slide originated when a volcanic field consisting of many strato - volcanoes, a type similar to Mount St. Helens in the Cascade Mountains, which erupted in 1980, collapsed and produced the massive landslide.

While the Markagunt landslide was a rare event, it shows the magnitude of what could happen in modern volcanic fields like the Cascades.

By measuring the abundance of an isotope of the noble gas argon in the rock or its crystals, Gazel and his colleague Michael Kunk of the U.S. Geological Survey found that the magma was much younger than the last known volcanic event on the East Coast — which occurred when the supercontinent of Pangaea slowly pulled apart into North America, Africa and South America some 200 million years ago, forming the Atlantic Ocean in the process.

«There have been no large events at the Bardarbunga volcano since yesterday (Sunday) and there is no sign of volcanic tremors,» Gunnar Gudmundsson, geophysicist at the Icelandic Met Office said.

Giant lateral collapses are rather common events during the evolution of a large volcanic edifice, often with dramatic consequences such as tsunami and volcano explosions.

More than 70 percent of all volcanic activity on Earth occurs on the seafloor, but details of these events are largely hidden from view by seawater.

The historic temperature pattern we observed has abrupt dips that match the emissions of known explosive volcanic eruptions; the particulates from such events reflect sunlight, make for beautiful sunsets and cool the earth's surface for a few years.

The most explosive volcanic event of the Quaternary was the eruption of Mt. Toba, Sumatra, 75,000 y ago, which produced voluminous ash deposits found across much of the Indian Ocean, Indian Peninsula, and South China Sea.

But despite that steady climb, not every year is warmer than the one before it, thanks to the vagaries of weather, the influence of natural climate cycles, and the effects of events like volcanic eruptions.

A new study has found geochemical clues near the summit of volcanic Mauna Kea that tell a story of ancient glacier formation, the influence of the most recent ice age, more frequent major storms in Hawaii, and the impact of a distant climatic event that changed much of the world.

Tarduno and his students had been studying massive lava flows that cover some of the High Arctic islands, and believes the same volcanic events that produced those igneous rocks also could have produced a series of islands along a low underwater mountain range in the Arctic Ocean called Alpha Ridge.

These events may be due to slow hydrothermal weakening of the volcanic edifice and / or gravitational stresses within or just below the edifice.

He picks out a number of purported climate changes — the 8.2 kyr event, two less well - defined changes around 5200 and 4200 years ago, a mysterious (volcanic?)

One example that I wasn't previously aware of, were the climate events of 536 AD — «dry fogs», crop failures, «dim suns» and yellow snow etc. — features consistent with a large volcanic eruption, possibly near the site of Krakatoa — and which correlates with evidence of a sulphate peak in the North GRIP ice core at the same time.

Investigation of ash sediments from recent Mt. Pinatubo eruptions and other major volcanic events show a signature of mass independent isotope ratios of sulfur, while sediment from minor eruption does not.