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Latest Tephra Stories

Unmanned Aircraft Used To Help Study Volcanic Plumes
2013-04-02 05:11:35

Last month, Earth science researchers from NASA traveled to Turrialba Volcano near San Jose, Costa Rica. The research team was there to study the chemical environment of the volcano by flying a Dragon Eye unmanned aerial vehicle into the sulfur dioxide plume and over its summit crater.

095f69449d119063427f382342aee25a
2011-08-12 13:30:19

The 2010 ash cloud from Iceland’s Eyjafjallajokull volcano that disrupted air travel in the UK and cost European businesses more than 2 and a hlaf billion dollars was likely a once in a lifetime event.

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2011-07-07 10:25:00

One of Iceland’s most active and most feared volcanoes looks like is getting ready to erupt, with measurements indicating magma movement.


Latest Tephra Reference Libraries

28_3226ca8171b89cafa5810af4efc77795
2005-05-25 10:36:46

Volcanic ash is the term for very fine rock and mineral particles less than 2 mm in diameter that are ejected from a volcanic vent. Ash is created when solid rock shatters and magma separates into minute particles during explosive volcanic activity. The usually violent nature of an eruption involving steam (phreatic eruption) results in the magma and perhaps solid rock surrounding the vent, being torn into particles of silt to sand size. The plume that is often seen above an erupting volcano...

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Word of the Day
abactinal
  • Pertaining to the surface or end opposite to the mouth in a radiate animal.
The word 'abactinal' comes from a Greek root meaning 'ray' and a Latin prefix meaning 'away'.
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