Latest from the UK Meteorological Office
New observations of volcanic dust
The weather balloon and probe was launched at 9 a.m. on Monday morning and clearly showed a 600 metre-thick layer of dust at a height of 4 km.
The layer was found to contain highly abrasive dust particles, at concentrations of a third of a milligram of dust in each cubic metre. While the amount sounds small, a typical jet engine would ingest some 60 billion of these particles every second.