Sentences with phrase «volcanic eruptions around»

As it happens, there were some big volcanic eruptions around the time of the Little Ice Age.

Straddling the equator 1,000 km west of mainland Ecuador, the Galápagos Islands were pushed up out of the Pacific by volcanic eruptions around five million years ago; the younger islands remain very active.

Some research has tied it to a series of small volcanic eruptions around the globe while other findings have linked it to the changes in winds and ocean circulation.

But those rulers may have had more to blame than just bad luck: According to a new study, volcanic eruptions around the ancient world likely suppressed the Nile's annual floods — critical for agriculture — by altering rainfall upriver in the Ethiopian highlands several times from the third to first centuries B.C.E..

The couple specialise in photographing volcanic eruptions around the world, and through their research organisation Volcano Watch International use their vibrant images of lava flows and explosive eruptions to educate the public about active volcanoes.

The end - Triassic extinction has been linked to a spate of volcanic eruptions around the birth of the central Atlantic Ocean.

Much evidence pointed to a large volcanic eruption around AD 536, with no evidence of one in in AD 540, and there was much debate over its climatic effects.

Not exact matches

This may have occurred when around 70 — 75,000 years ago the Toba caldera in Indonesia underwent a category 8 or «mega-colossal» eruption on the Volcanic Explosivity Index.

Similar soot particles can still be found from the volcanic eruptions that aided the mass extinction at the end of the Permian period around 252 million years ago.

Major volcanic eruptions can have a significant effect on the flow of the biggest rivers around the world, research shows.

Gigantic volcanic eruptions and the greenhouse gas emissions they caused wiped out around 90 percent of all animal species according to estimates.

«They have evacuated a lot of people from around the volcano, but volcanic unrest can persist for months or even decades without an eruption.»

«With volcanic eruption dates fixed precisely in time, we can see society in motion around them.

A new reconstruction of Antarctic ocean temperatures around the time the dinosaurs disappeared 66 million years ago supports the idea that one of the planet's biggest mass extinctions was due to the combined effects of volcanic eruptions and an asteroid impact.

Around 4 billion years ago, Earth was an inhospitable place, devoid of oxygen, bursting with volcanic eruptions, and bombarded by asteroids, with no signs of life in even the simplest forms.

But in a new study researchers have shown conclusively that a new form of low - energy lightning is also active during eruptions, arcing between particles as they exit the volcanic vent at around 100 metres per second.

The scientists studied works painted around the times of major volcanic eruptions, such as the cataclysmic explosion of Mount Krakatoa in 1883, to measure how much pollution was pumped into the skies.

However, volcanic eruptions before 1900, like the Tambora 1815 event, have the possibility to cause massive death tolls and also cause lower temperatures around the world leading to food security issues.

The latest volcanic eruption occurring on Jeju Island was volcanic activity known to have spewed around 7,000 years ago at Mt. Songak.

The research shows that volcanic eruptions beneath a glacial ice sheet would have created substantial amounts of liquid water on Mars's surface around 210 million years ago.

We conclude that the hypothesized «volcanic winter» that followed the Toba eruption did not have a significant impact on the climate of East Africa and was not the cause of a human bottleneck in Africa around 75 ka B.P.

Around 40,000 years ago, a sequence of three major volcanic eruptions devastated Neanderthal homelands in Europe and Asia, speeding the demise of this species.

Natural factors contributing to past climate change are well documented and include changes in atmospheric chemistry, ocean circulation patterns, solar radiation intensity, snow and ice cover, Earth's orbital cycle around the sun, continental position, and volcanic eruptions.

In any year, temperatures around the world can be nudged up or down by short - term factors like volcanic eruptions or El Ninos, when warm water spreads over much of the tropical Pacific Ocean.

Sign up here and start meeting Atlanta singles today!The trouble with living in such a big city is that finding that one - in - a-million person who's just right for you can seem tricky.Only in the 70s the radiocarbon dating method determined the age of a throne found buried under the ash: the eruption should have happened in the 1456 BC.Infact this date matches with a hypothesis made by the greek geologist Angelo Galanopulos who analized some episodes of the Bible (The Three Days of Darkness, The Earthquakes, The Parting of the Red Sea) and came to the conclusion that around the 1456 BC a big volcanic eruption interested the Eastern Mediterranean.

This volcanic eruption was caused by a crater on Kilauea which collapsed, sending lava back down into the earth, only to have it push it's way back to the surface in at least 12 different fissures in and around Leilani Estates, Hawaii.

[16] The last explosive eruption involving the central volcanic centre was from Montaña Blanca around 2000 years ago.

These caves were formed around 890,000 years ago from a volcanic eruption in Paul da Serra that ran down to the sea.

From the beginning of the island's settlement, around the 15th century, there have been 28 registered volcanic eruptions (15 terrestrial and 13 submarine).

Lake Toba (Danau Toba in Indonesian) is the largest volcanic lake in the world, formed by a cataclysmic eruption around 70,000 years ago.

It has long been suspected that the low solar activity during the Maunder Minimum was one of the causes of the Little Ice Age, although other factors like a small drop in greenhouse gas concentrations around 1600 and strong volcanic eruptions during that time likely played a role as well.

Putting my geologist's hat on, it is certainly plausable that (for instance) the passage of a low pressure system could bring forward an explosive volcanic eruption by a few hours; but extra precipitation reaching a magma chamber, or just lubricating faults around the chamber would be a bigger effect.

If we take some notable volcanoes in the past 600 years (Figure 1), we can confirm that frost rings in bristlecone pines are good indicators of large explosive volcanic eruptions, similar to the known coincidence of hemispheric cooling evidenced in growth rings of European trees in the years around historically dated eruptions.

The two spikes around 1983 and 1993 were a consequence of volcanic eruptions injecting material into the stratosphere resulting in short term warming of the lower stratosphere.

In fact, the major effect of significant volcanic eruptions is cooling due to the sulfate aerosols that they release (although in order to have a significant cooling effect, the eruption has to be large enough that it injects the aerosols into the stratosphere where they can stay around longer... and it apparently helps if the eruption is reasonably near to the equator).

The sulfate plot intrigued me, especially that huge spike roughly around 1300 A.D. I did some seeking and found some references to volcanic eruptions that would have produced such spikes.

Changes in sea level vary around the world and over time, because of the effects of ocean cycles, volcanic eruptions and other phenomena.

Geologically active regions around the world and especially in close proximity to melting ice and rising seas saw much greater volcanic eruption, earthquake and tsunami frequency.

Also the excess cooling in the + / - 5 years around 1910 corresponds to the highest level of activity of volcanic eruptions

In any year, temperatures around the world can be nudged up or down by short - term factors like volcanic eruptions or El Ninos, when warm water spreads over much of the tropical Pacific Ocean.

Natural causes include variations in the Sun's output and in Earth's orbit around the Sun, volcanic eruptions, and internal fluctuations in the climate system (such as El Niño and La Niña).

They have documented droughts that stretched for hundreds of years, dated historic earthquakes and volcanic eruptions, and found in trees around the world evidence of how the planet cooled and then started warming.

Lesson 1 - Plate Tectonics Lesson 2 - Mid-Ocean Ridges Lesson 3 - Deep - Sea Corals Lesson 4 - Subduction Zones Lesson 5 - Chemosynthesis and Hydrothermal Vent Life Lesson 6 - Deep - Sea Benthos Lesson 7 - Water Cycle Lesson 8 - Ocean Currents Lesson 9 - Ocean Waves Lesson 10 - Tides Lesson 11 - Energy from the Oceans Lesson 12 - Food, Water, and Medicine from the Sea Lesson 13 - Hurricanes Lesson 14 - Seamounts An average of 2,000 strong earthquakes and large volcanic eruptions occur every year all around the world.

* the break is not at the right date: there is no theoretical break around 1940 where the observations obviously seem to break, and there is no clear observed feature around 1963 (Agung explosion) where the model break — actually none of the volcanic eruptions shows a distinctive feature, as significative as in the models.

«although other factors like a small drop in greenhouse gas concentrations around 1600 and strong volcanic eruptions during that time likely played a role as well.»

Volcanic eruptions have caused cooling around the globe and in some instances the effects were seen over several years.