plume's

"The plume's about 16 days old, so it's certainly starting to dissipate," said Andrew Tupper, the director of the Volcanic Ash Advisory Centre in Darwin.

Ash Cloud Continues to Ground Australian Flights Ross Kelly 2011

"The plume's about 16 days old, so it's certainly starting to dissipate," said Andrew Tupper, the director of the Volcanic Ash Advisory Centre in Darwin.

Ash Cloud Continues to Ground Australian Flights Ross Kelly 2011

The new data, which measured the plume's electrical conductivity to create the image, supplements Smith's seismic data that gave scientists their first detailed look at the plume in 2009.

Scientists map volcanic plume under Yellowstone 2011

A previous study by Smith using seismic waves measured the plume's depth to at least 410 miles below the Montana-Idaho border.

Scientists map volcanic plume under Yellowstone 2011

"The plume's about 16 days old, so it's certainly starting to dissipate," said Andrew Tupper, the director of the Volcanic Ash Advisory Centre in Darwin.

Ash Cloud Continues to Ground Australian Flights Ross Kelly 2011

He said the ash plume's maximum altitude was oscillating between 20,000 and 30,000 feet (6,000 and 9,000 meters).

Irish Airports Reopen Despite Ash Cloud 2010

He said the ash plume's maximum altitude was oscillating between 20,000 and 30,000 feet.

Iceland Volcano Emits 'Massive' New Ash Cloud, Airports Closed 2010

He said the ash plume's maximum altitude was oscillating between 20,000 and 30,000 feet.

Huge ash cloud closes Irish airports 2010

The mission's objective was to determine the plume's speed and direction and the findings of the four to five-hour operation were to be passed on to the UK Met Office.

DK Matai: Volcanic Fury Suspends Air Travel: Europe Back to 19th C? 2010

The mission's objective was to determine the plume's speed and direction and the findings of the four to five-hour operation were to be passed on to the UK Met Office.

Volcanic Fury Suspends Air Travel: Europe Back to 19th C? 2010