[Vulkanen] The ring of fire #4: Veel aktiviteit!

quote:

Op dinsdag 1 juni 2010 00:31 schreef Burner82 het volgende:
Gebeuren nog meer rare dingen in guatamala....

http://edition.cnn.com/20(...)cy/index.html?hpt=T1

quote:

Alert level 2 raised at Taal volcano
By Arnell Ozaeta and Helen Flores (The Philippine Star) Updated June 09, 2010 12:00 AM

Batangas, Philippines – The Philippine Institute of Volcanology and Seismology (Phivolcs) has raised the alert level at Taal volcano from 1 to 2 due to the increasing frequency of volcanic earthquakes in the area. 

Taal, located 65 kilometers south of Manila, is one of the most unstable of the country’s 22 known active volcanoes with 33 recorded eruptions, the last one in 1977.

Experts raised the second of a five-level alert on Taal yesterday. The Phivolcs said volcanic quakes in the area have been occurring since April and the crater lake was heating up.

Allan Loza, officer-in-charge of Phivolcs Talisay said based on their monitoring, the volcanic earthquakes detected per day since April 26 have raised to 32 high frequency volcanic earthquakes and continuously increasing as of presstime. 

Subsequently, the Phivolcs immediately released an advisory preventing the public to visit the crater area of Taal, specifically the Daang Kastila trail.

In addition, a low frequency type volcanic earthquake was also detected since June 2. 

Meanwhile, the Regional Disaster Coordinating Council (RDCC) in Calabarzon (Cavite, Laguna, Batangas, Rizal, Quezon) said it had alerted nine Batangas towns after the alert level status of Taal volcano was raised to level 2 on Tuesday. 

“We have advised our Batangas Provincial Disaster Coordinating Council (PDCC) to issue a memorandum to all concerned municipalities regarding the alert level 2,” said RDCC director Vicente Tomazar. 

The nine towns in Batangas province include Agoncillo, San Nicolas, Santa Teresita, Laurel, Lemery, Talisay, Tanauan City, Balete, and Mataas na Kahoy.  

Officials of the tourist city of Tagaytay in Cavite, from which Taal volcano is also viewed, were also alerted to prohibit its tourists from trekking to the crater which is considered to be a danger zone.

Tomazar said if the alert level status hits level 3 under continuous monitoring, that is the time the authorities would activate its contingency plan and enforce evacuation of residents.

Phivolcs said the temperature measurement of the main crater of the lake had increased to 34°C as of May 24, higher by 2°C from the previous measurement on May 11. 

Taal Volcano Crater, Philippines

quote:

Op zaterdag 12 juni 2010 23:26 schreef Isiolo het volgende:
Wat blijft er trouwens van Nederland over als Laacher See actief wordt ?

quote:

Mt Baekdu eruption in next few years
The April 14 eruption of the Eyjafjallajokull volcano in Iceland sent volcanic ash clouds flying on currents and blanketing European skies. For five days after the eruption, 313 airports were shut down and 82,000 flights were canceled, causing a major disruption in air transportation. The online edition of the U.S. diplomatic journal Foreign Policy has named Merapi in Indonesia, Nyiragongo in the Democratic Republic of Congo, Yellowstone in the U.S., Santa Maria in Guatemala, and Avachinsky in Russia as volcanoes “ready to blow.”

Experts say Mount Baekdu in North Korea, which is classified as a dormant volcano, will see a major eruption in four to five years. This news spread like mythical rumors among Chinese volcanologists and was raised for discussion for the first time at a seminar hosted by the (South) Korea Meteorological Administration Wednesday. At the seminar “Volcanic Crisis on Mount Baekdu and Response,” earth science professor Yoon Seong-hyo of Busan National University said seismic activity on Mount Baekdu has surged to 240 times per month. He said the topography of the areas surrounding the mountain is rising, while trees are dying due to volcanic gas. These signs all herald volcanic activity.

The volcano in Iceland had a volcanic explosivity index of four, and the volcanic ash was just 0.11 cubic kilometers. Nevertheless, it brought the European aviation network to a standstill and caused massive damage to the world economy. According to scholars, when the Mount Baekdu volcano had a massive eruption in the mid-10th century, the volume of ash was 100 cubic kilometers and the volcanic explosivity index was 7.4. The eruption was reportedly one of the largest in human history. Given the magnitude of damage caused by the Iceland volcano, which generated ash clouds 1/1000th the volume of Mount Baekdu’s in the 10th century, it is difficult to even imagine the scale of damage that an eruption of the Mount Baekdu volcano could inflict.

A volcanic eruption can shift the flow of human civilization. Examples include Mount Vesuvius, which destroyed the ancient Roman city of Pompeii; Kikai Caldera, which destroyed the Neolithic civilization in Japan; and Laki in Iceland, which caused starvation that triggered the French Revolution when it erupted between 1783 and 1784. One academic theory suggests that the massive eruption of the Mount Baekdu volcano led to the collapse of the ancient Korean kingdom of Balhae. Amid mounting fears among the general public, the weather agency in Seoul has started preparation at the national level. Since Mount Baekdu is not under the country’s sovereignty, South Korea could face limits in its capacity to predict volcanic activity on the Korean Peninsula’s tallest mountain. People should not panic despite increased fears over a natural disaster, however, a phenomenon humans can do little about.

quote:

Kamchatka volcano threatens air traffic

The Shiveluch volcano on the Russian Kamchatka Peninsula has erupted, producing an ash plume of 6.5 kilometers. Nearby towns are outside the so-called danger zone.

The alert status at Shiveluch was declared “orange”, which means that eruption is in progress and the volcano’s activity may pose a threat to the aircraft.

At the same time, seismologists have reported weak ash bursts from the neighboring Klyuchevskaya Sopka Volcano.

quote:

Calamity declared in towns around Taal volcano
Filipino disaster officials have declared a state of calamity in a dozen cities and towns near Taal volcano.

The declaration in the province of Batangas allows local officials to release part of a 2.3- million peso ($50,000) calamity fund to the affected areas.

Alert level two remains in effect for Taal, which lies 30 miles south of the capital of Manila. No mandatory evacuations have been imposed but nearly 700 people have left their homes to stay in evacuation centers or with relatives.

Disaster officials have also prepared contingency plans for residents and tourists in Tagaytay, a city that lies on the rim of the volcano's outer crater.

The Philippine National Red Cross says it has six teams prepared to deploy in the event of an eruption.

A level two alert means that magma is moving towards the surface of the volcano, an activity that could lead to an eruption. It took effect early this month, although Taal has been restive since 1991. Alert level one was raised last year when the volcano began spewing bubbles and white steam.

Taal has an outer crater that holds an 18-mile wide lake created long ago during a massive eruption. The lake contains an island, called Volcano Island, which also has a crater lake.

Hiking on Volcano Island and boat rides to the smaller crater lake are popular activities in Tagaytay, which is a weekend and day trip destination for many in Manila because of its mild climate and rustic cottages.

quote:

Russian volcano eruption continues
Russia’s northernmost active volcano on Kamchatka Peninsula is spewing plumes of ash at a height of more than 6 kilometers, the local branch of the National Geophysical Service reported on Sunday.

The 3,300m Mt. Shiveluch has been erupting for many days now with 80 underground temblors registered in the past 24 hours alone.

Scientists say the volcano poses significant danger to villages in the area, just like the nearby Klyuchevskaya volcano.

quote:

Huge underwater volcano found in Indonesia
A U.S.-Indonesian underwater exploration project has found a giant volcano on the ocean floor north of Sulawesi, Indonesia.

“This is a huge undersea volcano, taller than all but three or four mountains in Indonesia,” Jim Holden, the U.S. chief scientist of the expedition, said in a news release issued Monday by the U.S. National Oceanic and Atmospheric Administration.

The volcano rises more than 3,000 metres from the sea floor, which is about 5,500 metres deep at that point.

The NOAA ship Okeanos Explorer mapped the volcano using its sonar. The ship's underwater robot, Little Hercules, took pictures of the feature, known as Kawio Barat.

The project is a new way of exploring the ocean floor, because most of the scientists are on shore at command centres in Jakarta and Seattle, connected to the ship by satellite and high-speed internet, NOAA said.

When Little Hercules turns on its the lights and high-definition video cameras, "it’s live from the sea floor to scientists ashore,” said Holden, who's in Jakarta.

The researchers hope to find new phenomena and information about ocean ecosystems, acidification and climate change by investigating previously unexplored areas.

So far, Okeanos Explorer has mapped about 620,000 hectares of the Indonesian sea floor. With an Indonesian research vessel, the expedition will continue until Aug. 14.

The volcano is located west of Indonesia's Kawio Islands, which are between Indonesia and the Philippines