Latest Tephra Stories
An unusual ash-like substance that has been described as white, dusty and/or milky rain has been falling on parts of Idaho, Washington and Oregon, and its origin has yet to be scientifically confirmed, various media outlets are reporting.
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.
The 2010 ash cloud from Icelandâ€™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.
One of Icelandâ€™s most active and most feared volcanoes looks like is getting ready to erupt, with measurements indicating magma movement.
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...
- The horn of a unicorn considered as a medical or pharmacological ingredient.
- A winged horse with a single horn on its head; a winged unicorn.