Saturday, July 25, 2009

Kelud Mountain


Kelud is a volcano mountain located in East Java on Java in Indonesia. Like many Indonesian volcanoes and others on the Pacific Ring of Fire, Kelud is known for large explosive eruptions throughout its history. More than 30 eruptions have occurred since 1000 A.D. this mountain has erupted many times. On May 19, 1919, an eruption at Kelud killed an estimated 5,000 people, mostly through hot mudflows (also known as "lahar"). More recent eruptions in 1951, 1966, and 1990 have altogether killed another 250 people.

A strong and explosive eruption on early February 1990 produced a 7 kilometres (4 mi) high column of tephra, heavy tephra falls and several pyroclastic flows. More than thirty people were killed.

On October 16, 2007, Indonesian authorities ordered the evacuation of 30,000 residents living near Kelud, after scientists placed the volcano on the highest alert level, meaning that they expected an imminent eruption.
Kelud erupted at about 3 p.m. local time on Saturday, November 3, 2007. The eruption was confirmed by the Indonesian government's Centre for Vulcanology and Geological Hazard Mitigation. More than 350,000 people lived within 10 kilometres (6 miles) of the volcano. Surabaya, Indonesia's second-largest city and home to one of the country's busiest airports, is 90 kilometres (56 miles) to the northwest. Many villagers were reported fleeing the area in panic after reports of the eruption. Seismological equipment near the volcano's crater was still operating, and scientists said that indicated a small eruption at best.
However, early Sunday morning, November 4, Mount Kelud spewed ash 500 metres into the air, indicating a full eruption was taking place. On November 5, new columns of smoke and steam erupted from the crater. Boiling water cascaded down the flanks of the mountain from the crater lake, and seismological equipment near the crater ceased working. The following day, a lava dome rose through the center of the crater lake atop the mountain.The volcano continued to emit smoke, with plumes reaching a kilometre (3,280 feet, or six-tenths of a mile) into the atmosphere. But after 48 hours of smoke and ash but no lava, Indonesian officials declared on November 8 that no eruption was immediate. By November 12, Mount Kelud began spewing lava into its crater lake. The lava dome, which had expanded to 250 metres (roughly 275 yards) long and 120 metres (131 yards high), cracked open and lava began oozing into the surrounding water. Smoke rose more than two kilometres (1.2 miles) into the air, and ash dusted several villages around the volcano. On November 14, smoke billowed 2.5 kilometres (1.5 miles) into the air, and light ash covered villages 15 kilometres (9.3 miles) away.

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