Tag: nature

Anak  Krakatau

Anak  Krakatau

Anak Krakatau has grown at an average rate of five inches (13 cm) per week since the 1950s. This equates to an average growth of 6.8 meters per year. The island is still active, with its most recent eruptive episode having begun in 1994. Quiet periods of a few days have alternated with almost continuous Strombolian eruptions since then.

Hot gases, rocks, and lava were released in an eruption in April 2008. Scientists monitoring the volcano have warned people to stay out of a 3 km zone around the island. Several videos of Krakatoa on YouTube show recent footage of eruptions and of the inside of the crater as seen from the rim of the volcano.

On 6 May 2009 the Volcanological Survey of Indonesia raised the eruption alert status of Anak Krakatau to Level III. A Level Three alert signifies an increasing tendency toward eruption, relatively high unrest, and magna close to the crater. A recent expedition to the volcano has revealed that a 100-meter (328-foot)-wide lava dome is growing in its crater. The dome has two active vents that eject incandescent gas.

Volcanic Crevasse

Photographer Unknown, Volcanic Crevasse at Grimsvotn, Iceland

Grímsvötn is a volcano in South-East Iceland. It is in the highlands of Iceland at the northwestern side of the Vatnajökull ice-cap.

Grímsvötn is a basaltic volcano which has the highest eruption frequency of all the volcanoes in Iceland and has a southwest-northeast-trending fissure system. The massive climate-impacting Lake fissure eruption of 1783–1784 was a part of the same fissure system. Grímsvötn was erupting at the same time as Laki during 1783, but continued to erupt until 1785. Because most of the volcano lies underneath Vatnajökull, most of its eruptions have been subglacial and the interaction of magma and meltwater from the ice causes phreatomagmaticexplosive activity.

Grimsvotn erupted again on 21 May 2011 with 12 kilometer high plumes accompanied by multiple earthquakes. This forced the cancelation of nine hundred flights in Iceland, the United Kingdom, Greenland, Germany, Ireland and Norway on the 22-25 May.