When Nature Spouts Off

Mount Agung Volcano Continues Sporadic Eruptions Demonstrating it’s Not Over until it’s Over

A large eruption of the Mount Agung Volcano on Thursday April 11, 2010, erupted with a sound that was heard over a radius of 12-kilometers. Volcanic observers and local residents report the mountaintop was aglow during the period of the eruption.

Beritabali.com quotes Dr. Devy Kamil Syahbana, a Government Volcanologist monitoring Mount Agung who said the mountain was producing Strombolian eruptions. Named after an Italian volcano of the same name, Strombolian eruptions are considered relatively mild on the explositivity index of between 1 and 3. Such eruptions are comprised of the ejection of incandescent cinder, lapilli and lava bombs rising potentially several hundred meres above the crater.

Devy Kamil went on to explain that the recent spate of Strombolian eruptions demonstrate that Mount Agung is an open system volcano still very much alive in magmatic terms.

The volcanologist said there is no need for many earthquakes to trigger another eruption with magma reservoirs having now risen to a significant degree near the surface of the volcano. He said an eruption will occur when pressure builds sufficiently to cause magma to overflow the crater. In the current situation, Devy Kamil warned the public should not engage in any trekking and climbing activity on Mount Agung. Warning a significant eruption could happen with little or no warning.

An exclusion or “no go” zone of 4-kilometers from Mount Agung’s peak remains in effect, with authorities warning it is unsafe to conduct any activities inside that danger zone.

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