Volcanology - Articles - Zimbio

Volcano Rumbles In Ecuador.

Mon, 11 Nov 2008 03:08:59 GMT

posted by toreyray

Ecuador is on alert as Reventador volcano spewed lava but experts said it posed no threat.

We made a Volcano

Mon, 12 Aug 2008 19:35:00 GMT

posted by beeboo_13
Hello Everyone!

We did a really cool science project today.
We made a Volcano.

Click Here to learn how to make a Volcano

The girls had a blast making the Volcano, and are very eager to show their dad when he gets home.

Here are a few Pictures of our Volcano.

What is a Volcano?
Let's first take a look at the earth. The earth is made up of 4 main layers-the inner core, the outer core, the mantle and the crust. The crust is where we live, on the surface of the earth. Below the crust lies the mantle, which is made up of solids, liquids and gases.

Types of Volcanoes(click here for a unit study on volcanoes)
Volcanoes come in all different shapes and sizes, which is often a result of the types of eruptions that occur.

Composite Volcanoes (also called Stratovolcanoes) are the most familiar type of volcano. They are tall, symmetrical, and slope steeply towards a small summit crater. They are usually formed by multiple Plinian eruptions, which omit large amounts of lava in violent, tall eruptions which add quickly to the height of the volcano.

Scoria Cone Volcanoes (also called cinder cone volcanoes) are small cones which are often the result of a single eruption event-usually a strombolian eruption. These types of volcanoes are the most common.

Shield Volcanoes are low, wide volcanoes, formed by low viscosity, slow moving lava which spreads over a many kilometers.

*Blessings*
Jennifer

Kilauea Volcano Erupts Explosively And Vents Noxious Gas

Fri, 29 Mar 2008 19:35:00 GMT

posted by odidis

ScienceDaily (Mar. 29, 2008) — Explosive eruptions and noxious gas emissions at Kilauea Volcano in Hawaii this week have prompted scientists to work around the clock to understand what will happen next and how to keep the public out of harm's way.

Scientists are monitoring gas emissions and seismic activity at Kilauea, which on March 19, 2008 experienced its first explosive eruption since 1924. The volcano is also emitting sulfur dioxide at toxic levels.

At 2:58 a.m. H.s.t on Wednesday, March 19, 2008, a small explosion occurred at Halema‘uma‘u Crater at the summit of Kilauea Volcano in Hawai‘i Volcanoes National Park. This event was erroneously reported as an earthquake earlier this morning. The explosion scattered debris over an area of about 75 acres (30 hectares), covering a portion of Crater Rim Drive and damaging the Halema‘uma‘u overlook. No lava was erupted as part of the explosion, suggesting that the activity was driven by hydrothermal orgas sources.

In addition to damaging the overlook, explosive debris covers the trail to the overlook, the Halema‘uma‘u parking area, and the portion of Crater Rim Drive adjacent to the parking area. On Crater Rim Drive the debris was up to 2 centimeters in size, with the size and thickness of debris increasing toward the overlook. The largest observed block ejected during the explosion was about 1 cubic meter (35 cubic feet) and must have been propelled from the vent located more than 70 m (230 feet) below the crater rim. Small impact craters from 30 cm (1 foot) blocks are abundant in the Halema‘uma‘u overlook area. Rock debris also extends halfway across the floor of Halema‘uma‘u Crater. The debris is composed of rock fragments that were derived from the walls of Halema‘uma‘u Crater. No fresh lava was observed on the floor of Halema‘uma‘u or in the ejected debris.

At 2:55 am, the Hawaiian Volcano Observatory recorded a series of seismic events that may have been shallow, high-frequency earthquakes or minor explosions. The main explosion at 2:58 was associated with long period seismicity. Low frequency sound waves were also detected by the University of Hawai`i infrasound laboratory, operated by Dr. Milton Garces. These signals have persisted through this morning indicating continuing energetic release ofgas from the vent in Halema‘uma‘u Crater.

The explosion produced a small crater along the east wall of Halema‘uma‘u that is about 20-30 meters (65-100 feet) in diameter. The crater occupies the area in which incandescence had been observed during the previous week. Sulfur dioxide emissions from the new explosion crater are still elevated, and sounds of rock breaking are frequent.

This is the first explosion in Halema`uma`u crater since 1924 and the first eruption of any kind in Kilauea caldera since September 1982.

Future explosive activity is possible and the Hawaiian Volcano Observatory continues to monitor the activity.

Sulfur dioxide emissions at the volcano's summit have increased to a rate that is likely to be hazardous for areas downwind of Halema'uma'u crater. Future explosions from Halema'uma'u Crater are possible.

"This historic activity has created new hazards that did not exist before -- explosive eruptions as well as toxic sulfur dioxide emissions -- in the middle of a national park," said U.S. Geological Survey Volcano Hazards Program Coordinator John Eichelberger.

Adapted from materials provided by United States Geological Survey.

Need to cite this story in your essay, paper, or report? Use one of the following formats: APA

MLA United States Geological Survey (2008, March 29). Kilauea Volcano Erupts Explosively And Vents Noxious Gas. ScienceDaily. Retrieved March 29, 2008, from http://www.sciencedaily.com /releases/2008/03/080327171053.htm
The gases coming out of Kilauea volcano in Hawaii are shifting: Toxic sulfur dioxide gas levels are increasing dramatically, which might indicate other changes ahead. (Credit: USGS) Ads by Google Advertise here

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Wednesday

Tue, 7 May 2008 11:26:00 GMT

posted by jmbnv

Split Decision - USA Today

Pentagon Targeted Iran for Regime Change After 9/11
Common Dreams

Commentary: Pins and Panders - Washington Post

USA Today SPORTS

Best Careers 2008 - U.S. News & World Report

Cigarette Taxes Are Fueling Organized Crime
Wall Street Journal

Monet Painting Sells for Record $41.4 Million
MSNBC

Wabash Valley Fault - That Earthquake In Illinois Could Be The Start Of Something
Live Science

Cars sit in the driveway of the Theta Chi fraternity house at San Diego State University Tuesday in San Diego. The house was one of nine locations served with drug search warrants in Operation Sudden Fall. Seventy-five San Diego State University students and 21 non-students were arrested after an undercover investigation of a college drug ring.
- Story: 75 students arrested in San Diego State University drug bust
(May 06, 2008) - AP

A resident points at a cloud of smoke and ashes produced by intensified eruption of the Chaiten volcano over Chaiten on Tuesday, in southern Chile. The eruption spewed incandescent material and blated ash some 20 miles into the Andean sky, forcing authorities to a complete evacuation of the area. - Associated Press

A cloud of smoke and ashes produced by intensified eruption of the Chaiten volcano are seen over Chaiten on Tuesday, in southern Chile. The eruption spewed incandescent material and blated ash some 20 miles into the Andean sky, forcing authorities to a complete evacuation of the area. - Associated Press

A teacher checks a child for symptoms of hand, foot and mouth disease before acceptance into the kindergarten in Xiangfan in central China's Hubei province Tuesday. More than 11,900 children have been reported sick with hand, foot and mouth disease in China, and at least 26 of those cases have died, according to China's Xinhua News Agency. - AP

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one dead so far from volcano/click title bar

Mon, 6 May 2008 20:31:00 GMT

posted by orerx

One dead as Chilean volcano spews ash for third day

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SANTIAGO (Reuters) - A volcano spewed ash over Patagonian towns in southern Chile on Sunday, two days after its first eruption in thousands of years forced authorities to evacuate some 4,000 residents.

Local media said an elderly woman died as rescue teams evacuated the last remaining people from the town of Chaiten, close to where the snow-capped volcano of the same name erupted on Friday, triggering earth tremors and sending a cloud of ash two miles into the air.

There is no record of the volcano erupting in the last 2,000 years, according to Chilean geology officials.

President Michelle Bachelet visited the area on Sunday with several government ministers and said she hoped to fly over the worst-affected areas.

"The idea that we have is to try to fly over the Chaiten volcano, go to Chaiten and if the conditions allow, to Futaleufu," Bachelet told reporters in the nearby city of Puerto Montt, praising the evacuation effort.

Residents were also evacuated from nearby Futaleufu.

Southern Chile is fragmented into hundreds of small islands and fjords. Some residents had never ventured from Chaiten itself until the 3,280-foot (1,000-meter) volcano six miles away forced them to leave.

Chile's 2,000 volcanoes include two of Latin America's most active -- Villarica and Llaima. Scientists say some 500 are potentially active. Chile has the world's second most active string of volcanoes behind Indonesia.

Llaima, about 435 miles south of Santiago, erupted on New Year's Day, spewing ash and molten lava and forcing dozens of tourists and staff to evacuate a wilderness park.

(Reporting by Manuel Farias; writing by Helen Popper, editing by Todd Eastham)