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You've heard about solar flares.

Eruptions at this time built up the first major volcanic edifice, forming a stratovolcano in alternating explosive and effusive eruptions.

It's one of the mysteries we still have, super flares.

Cotopaxi's most violent eruptions in historical times occurred in the years 1742, 1744, 1768, and 1877.

There is evidence of past subglacial eruptive activity on the volcano in the form of a subglacial deposit on its summit.

The only abrupt worldwide change would have been major asteroid impacts or volcanic super eruptions.

But Carl believes Sinabung will only lead to medium size eruption

This is clearly demonstrated by two eruptions, Agung (1963) and El Chichón (1982).

The volcanic rocks present from the prior eruptions feature olivine and have a small presence of hornblende.

Deposits recording the last 14,000 years at Mount Baker indicate that Mount Baker has not had highly explosive eruptions like those of other volcanoes in the Cascade Volcanic Arc, such as Mount St. Helens, Mount Meager or Glacier Peak, nor has it erupted frequently.

This leads to geyser like eruptions of CO2 gas mixed with dark basaltic sand or dust.

Stellar flares are bursts of high energy particles that are emitted due to the same magnetic activity.

There has been no eruption since 1944, and none of the post 79 eruptions were as large or destructive as the Pompeian one.

But if there are not to be more and even worse eruptions, Israeli policymakers need to ask themselves some fundamental questions.

During that time, cold winters, ash fall from volcanic eruptions, and bubonic plagues adversely affected the population several times.

The growth of the mountain was occasionally interrupted by major eruptions, leading to the collapse of the summit to form calderas.

It injected more particulate into the stratosphere than any eruption since Krakatoa in 1883.

And then there's earthquakes, and then volcanic eruptions, on the order of one every five years, that completely wipes the area out.

Eruptions destroyed Montserrat's Georgian era capital city of Plymouth and two thirds of the island's population was forced to flee.

Eruptive variables are stars that experience sudden increases in luminosity because of flares or mass ejection events.

Ash from these eruptions has been found as far away as south of Rome's border, to the north.

In the past two centuries, human activities have seriously altered the global carbon cycle, most significantly in the atmosphere.

After the destructive volcanic eruptions of the Laki volcano during 1783 84, the population reached a low of about 40,000.

For example, many of Earth's volcanoes have erupted dozens of times in the past few thousand years but are not currently showing signs of eruption.

The quantities of mud deposited in some cases would have required eruptions of much more gas than is known in any gasfield anywhere.

Situated in the Pacific Ring of Fire, the Philippine archipelago is usually ravaged by strong typhoons, earthquakes and volcanic eruptions.

Many places are subject to earthquakes, landslides, tsunamis, volcanic eruptions, tornadoes, sinkholes, blizzards, floods, droughts, wildfires, and other calamities and disasters.

It was given the name Mordor before Sauron settled there, because of its volcano and its eruptions.

The interiors of these caverns may be protected from micrometeoroids, UV radiation, solar flares and high energy particles that bombard the planet's surface.

Part of the Ring of Fire, a region of the world subject to earthquakes and volcanic eruptions, Colombia is dominated by the Andes (which contain the majority of the country's urban centres).

An IMAX (70 mm) camera was used to film a variety of scenes for the IMAX film Blue Planet , including the effects of floods, hurricanes, wildfires and volcanic eruptions on Earth.

Infertile soil, volcanic eruptions, deforestation and an unforgiving climate made for harsh life in a society where subsistence depended almost entirely on agriculture.

History of volcanic eruptions Geological history Volcanic activity first took place at Etna about half a million years ago, with eruptions occurring beneath the sea off the ancient coastline of Sicily.

Water and other volatiles can more easily and gradually escape from mafic lava, so eruptions of volcanoes made of mafic lavas are less explosively violent than felsic lava eruptions.

This spacecraft was designed to observe gamma rays, X rays and UV radiation from solar flares during a time of high solar activity and solar luminosity.

The Saleaula lava fields situated on the central north coast of Savai'i are the result of the Mt Matavanu eruptions which left 50 km² (20 sq mi) of solidified lava.

From about 35,000 to 15,000 years ago, Etna experienced some highly explosive eruptions, generating large pyroclastic flows, which left extensive ignimbrite deposits.

In a main sequence star such as the Sun, the lowest level of the atmosphere is the thin chromosphere region, where spicules appear and stellar flares begin.

Major eruptions occurred in 1914, when the island mountain spilled enough material to become permanently connected to the mainland, and a lesser eruption in 1960.

However, it has been subject to many natural disasters, including heat waves, blizzards, avalanches, earthquakes, acid rain, floods, hurricanes, lightning strikes, tornadoes, and volcanic eruptions.

For the next eight years the volcano continued erupting, although this activity was dominated by relatively quiet eruptions of lava that scorched the surrounding of land.

Under these conditions, enormous bursts of star formation are triggered, so rapid that most of the gas is converted into stars rather than the normal rate of 10 or less.

Possible mechanisms for the vapor release are sublimation from about 0.6 km2 of exposed surface ice, or cryovolcanic eruptions resulting from radiogenic internal heat or from pressurization of a subsurface ocean due to growth of an overlying layer of ice.

This supernovae has been used to test theories on the origins of similar Type Ic supernovae at higher distances and theories on the connection between supernovae and gamma ray bursts.