Centre of Volcanology and reduce geological risks (TSVSGR) of Indonesia has announced a third, penultimate readiness to the eruption of Mount Merapi volcano in Central Java province — one of the most densely populated areas on the planet, according to the national media on Friday.
Merapi (which in Indonesian means "fiery mountain") is one of the most active volcanoes in Indonesia — a country that ranks first in the world in the number of such "fire mountains." It is located in close proximity to one of the most important cities in Java — Yogyakarta.
"The status of Mount Merapi from the evening of October 21 raised to the second level (" alarm ") to the third (" waiting "), and all activities in the area at risk (within a radius of 8 kilometers from the summit) will be closed for security reasons" — said the news portal Detik . com head TSVSGR Surono (Surono). In particular, the banned popular among tourists climbing the volcano.
According to him, the second level of readiness to eruption was declared the "fiery mountain" is September 20, and since then the activity of Merapi continues to grow. In one environment only in the area were recorded 39 volcanic earthquakes and 85 Lava added Surono.
Measuring devices also talk about accelerating growth of the volcano, which have now reached 20 centimeters a day. The "official" height Merapi is 2.968 kilometers, but for the active volcano is the value of a variable: with strong emissions it may be up to tens of meters in a matter of weeks.
The head of the Center for Volcanology and Technology Studies Subandrio (Subandrio) said that such a dome in hodey beginning of the eruption has not yet formed, and so far we can not say for sure exactly how areas most at risk. Apparently, lava flows, which at the time of the eruption in 2006 had advanced four miles, will go to the south, south-west or north, he added.
"It is possible that the lava advance and for a distance of 15 kilometers," — said Subandrio.
Merapi is not only one of the most active, but also among the most dangerous volcanoes in Indonesia. The eruption in 2006 killed two people tend to "fiery mountain", which burned alive in one of the specially created on the slopes of steel silos. In 1994, pyroclastic clouds — hot clouds of ash and gas that can travel at hundreds of miles an hour — claimed the lives of almost 70 people.
The most powerful of the modern period the eruption of Mount Merapi in 1930 killed 1.37 thousand.
Indonesia — the undisputed champion of the world in the number and activity of volcanoes. The world's largest archipelago is part of the so-called Pacific "Ring of Fire" — a horseshoe-shaped band of volcanoes and tectonic faults up to 40,000 kilometers. It encircles the Pacific Ocean, passing along the coasts of North and South America to the southern part of Alaska, then turns to Japan, the Philippines and Indonesia, and ends near the island of New Guinea, New Zealand and South West Pacific. It is in the "Ring of Fire" is almost 90% of the approximately one thousand five hundred famous volcanoes of the planet. There are also 90% of all earthquakes in the world.
In the region of Indonesia plates that form the bottom of the Indian and western Pacific oceans, but with the Asian. Advancing to the last denser oceanic tectonic plate under enormous pressure down to the mantle of the world and at a depth of about 100 kilometers below the surface begin to melt, resulting in the release of the resulting molten lava. Therefore, the length of the Indonesian part of the "Ring of Fire" (3.218 thousand kilometers) are volcanoes. As a result, the world's largest archipelago, there are only 129 active "fire mountain", bringing the total number up to 600 — more than in any other country.
Source: RIA Novosti