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The natural world. Looking pretty for 3.5b years.

Volcano May Explode, a timeline update

Volcano May Explode, a timeline update

Author: Hugh Bollinger/Thursday, November 30, 2017/Categories: natural history, sustainability, environment, adventure , Archive Pick of the Week

                     Topography of Bali with Mount Agung Volcano (credit: Wikicommons)

A classic volcano, Mount Agung, on the island of Bali may be ready to erupt. The last time this happened was in 1963 when an eruption caused major damage to the island popular with travelers. Similarity in seismic measurements over the past few days have raised concerns of a repeat of the eruption from 54 years ago. 70,000 people have been told to evacuate to nearly 15 miles away from the volcano. A new report from Australia has provided some of the latest details: 

The Balinese volcano remained quite for the two months but has now awakened according to Indonesian emergency and Australian news sources now report. Predictions of the eruption's potential impact remain unclear.

 

                     Mount Agung on Bali Begins to Erupt, 11-21-17 (credit: BNPB Indonesia)

 Mount Agung Ash Plumes, Bali 11-29-2017  (credit: MODIS Terra satellite)

The Terra environmental monitoring satellite captured Mount Agung during its new eruption on Bali. The image combines infrared and visible light wavelengths to differentiate ash, clouds, and forest. Plumes appear to be rising from two vents in the volcano. According to NASA, steam, lava, and ash from the eruption typically have local and regional effects, while gaseous emissions like sulfur dioxide (SO2) can cause wider and more global effects, including atmospheric cooling.

A NASA researcher said:

“The current eruption of Mount Agung is not yet energetic enough to affect global temperatures like Mount Pinatubo did after its eruption in 1991. The Agung eruption would have to deposit a significant amount of sulfate aerosol into the lower stratosphere, higher than 10 miles in altitude. The current eruption height is about 6 miles, so below what would be necessary to have a global effect on (Earth) surface temperatures.”

The volcano eruption timeline will be updated as new developments occur.

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