Why did mount merapi erupted in 2010

Typically used to measure ozone, the Dobson Unit is the number of molecules of gas that would be required to create a layer 0. On November 9, , the Volcanic Ash Advisory Centre in Darwin, Australia, reported a sulfur dioxide cloud over the Indian Ocean between 40, and 50, feet 12, and 15, meters , in the upper troposphere.

The effects of sulfur dioxide vary depending on the amount emitted, the latitude where the emission occurs, the altitude where the gas is concentrated, and regional wind and weather patterns. At ground level, sulfur dioxide irritates human skin, eyes, and the upper respiratory tract. At higher altitudes, sulfur dioxide can undergo a series of chemical reactions affecting the environment. For instance, by reacting with water vapor, sulfur dioxide can create sulfate ions, precursors to sulfuric acid.

Field coordinator Widi Sutikno, of the Sleman district on the southern slopes of the 2, metre mountain, said only about 3, people out of 11, in his area had sought shelter in makeshift refuges. But they need to go back to the camps and not their houses. Sukamto, 50, a farmer, said his family had been evacuated but he still needed to tend his cows. I work at around eight kilometres from the top of Merapi and I think it's still safe," he said.

The Jakarta Post reported that Merapi had erupted three times on Monday afternoon, spewing lava down its southern and south-eastern slopes. Vulcanologists have warned that Merapi currently has more energy than before the June blast, its last fatal eruption. Its deadliest eruption occurred in when more than 1, people were killed.

Heat clouds from another eruption in killed more than 60 people. The volcano lies around 25 kilometres north of the city of Yogyakarta on Java island. In August, the 2, metre Mount Sinabung on the island of Sumatra erupted for the first time in years, sending thousands of people into temporary shelters and disrupting flights. Mount Sinabung is near Lake Toba, a kilometre long volcanic crater that some archaeologists believe threatened the survival of the human race when it erupted between 69, and 77, years ago.

We acknowledge Aboriginal and Torres Strait Islander peoples as the First Australians and Traditional Custodians of the lands where we live, learn, and work. Information Products. A decision to extend evacuation zone from 15 to 20 km yellow dashed line, 9 to 12 mi at Merapi Volcano saved between 10, and 20, lives from pyroclastic flows and floods below arrows.

Thousands were saved by accurate eruption forecasts of Mount Merapi, Indonesia. House in the village of Kopeng, 6 km 3. In this image, sulfur dioxide is measured in Dobson Units. If you compressed all the sulfur dioxide in an atmospheric column into a flat layer at 0 degrees Celsius and standard atmospheric pressure 1 atmosphere , a Dobson Unit would be 0.

On November 9, , the Darwin Volcanic Ash Advisory Center based in Australia reported that a sulfur dioxide cloud was observed over the Indian Ocean, between 40, and 50, feet 12, and 15, meters -in the upper troposphere.