MET Office - Updated ash concentration graphics NE Atlantic/Europe area
Monday 23, May 2011
Eruption of Grimsvötn volcano in Iceland: no impact expected on European airspace. EUROCONTROL was advised by the Icelandic Met Office that the Grimsvötn volcano in Iceland had erupted.
The plume of ash has reached a height of 12 km or higher around Iceland and is currently drifting in north-eastern direction.
There is currently no impact on European or transatlantic flights and the situation is expected to remain so for the next 24 hours.
Aircraft operators are constantly being kept informed of the evolving situation.
For further information: Ash Concentration Charts
Ash Concentration Charts
These charts supplement the London Volcanic Ash Advisory graphics (VAG) and advisories (VAA). They are to be used with caution. The outer edge of the low concentration zones (indicated as cyan) on these charts represent the standard threshold (200 micrograms of ash per cubic metre) as used in the VAG and VAA. Due to the automated nature of production these charts will not be identical to the Volcanic Ash Graphic. In accordance with the definitions in the ICAO EUR/NAT Volcanic Ash Contingency Plan (ICAO EUR Doc 19 and NAT Doc 06 Part II, December 2010 edition), the following concentrations are indicated:
Low Concentration (<2000 micrograms per cubic metre), is indicated as cyan on the map graphics on these web pages.
Medium Concentration (>=2000 micrograms per cubic metre, < 4000 microgram per cubic metre), is indicated as grey on the map graphics on these web pages.
High Concentration (>=4000 micrograms per cubic metre), is indicated as red on the map graphics on these web pages.
Operators should refer to national NOTAMs for official guidance on any restrictions/actions regarding flight in affected airspace, and the official boundaries applicable to such restrictions/actions.
Airlines operating in UK airspace should review the document “Guidance Regarding Flight Operations in the Vicinity of Volcanic Ash” which can be found via http://www.caa.co.uk/volcano, under the ‘Volcanic Ash Information’ link.
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