and are accompanied by text with details (as known) about the nature of the unrest or eruption, especially in regard to ash-plume information and likely outcomes. The colour legend is given below the map.
GREY: Volcano appears quiet but is not monitored adequately. Absence of unrest unconfirmed.
GREEN: Volcano is in normal, non-eruptive state.
or, after a change from a higher
/weather/aviation/volcanic-hazards/
(a.s.l.): 4-5 km/14-17,000 ft but sometimes shoots up to 6 km /20.000 ft.
Heading: Southeast. But low level winds are easterly.
Colour: Grey/light gray.
Tephra fallout: Farther west now, ashfall started at Þorvaldseyri (south of eruption)
around 08:00h, has also been reported at Skógar this morning (7-8 km
east of Þorvaldseyri). The ash is black.
Lightning: No detections today over
/media/jar/Eyjafjallajokull_status_2010-05-09_IES_IMO.pdf
plume:
Height (a.s.l.): ~5 km / 17,000 ft but sometimes shoots up to 6 km / 20,000 ft.
Heading: Southeast. Low level winds are variable.
Colour: Grey / light gray.
Tephra fallout: Ashfall reported at Drangshlíð and Skarðshlíð almost continuously for
the last 24 hours. The ash is rather coarse, estimated by the farmers to
be ~2-3 mm.
Lightning: No lightning has been detected on instruments over
/media/jar/Eyjafjallajokull_status_2010-05-10_IES_IMO.pdf
measurements, ATDnet – UK Met. Offices lightning
detection system, MERIS satellite images and observations from airkraft.
Eruption plume:
Height (a.s.l.): 5 - 6 km / 17,000 ft - 20,000 ft.
Heading: Southsoutheast.
Colour: Grey.
Tephra fallout: No reports, but clearly seen on video cameras.
Lightning: Nine lightning were recorded on the ATDnet.
Noises: No reports.
Meltwater: Low water
/media/jar/Eyjafjallajokull_status_2010-05-11_IES_IMO.pdf
detection system, NOAA satellite images and observations from
aircraft and web-based ash reports from the public.
Eruption plume:
Height (a.s.l.): Mainly ~ 4 - 5 km / 13,000 - 17,000 ft, highest up to ~ 6 km / 20,000
ft.
Heading: East-southeast.
Colour: Grey.
Tephra fallout: Ashfall reported in Vík í Mýrdal and Meðalland. Ash mist in Álftaver.
Lightning: Several lightning were recorded
/media/jar/Eyjafjallajokull_status_2010-05-12_IES_IMO.pdf
Offices
lightning detection system, NOAA satellite images, observations from aircraft
and web-based ash reports from the public.
Eruption plume:
Height (a.s.l.): Mainly 6 km / 20,000 ft, highest up to ~ 9 km / 30,000 ft. The wind is
calm over the eruption site and unstable air south of it, which does
affect the height of the ash cloud.
Heading: Southeast.
Colour: Grey.
Tephra fallout
/media/jar/Eyjafjallajokull_status_2010-05-13_IES_IMO.pdf
NOAA satellite images and web-based ash reports
from the public.
Eruption plume:
Height (a.s.l.): Mainly ~ 6 - 7 km / 21,000 - 24,000 ft, occationally reaching 8 km /
27,000 ft.
Heading: Southwest and later south.
Colour: Grey.
Tephra fallout: Ashfall reported south of Eyjafjallajökull and ashdrift southeast of
Eyjafjallajökull.
Lightning: Some 30 lightning strikes were recorded
/media/jar/Eyjafjallajokull_status_2010-05-15_IES_IMO.pdf
NOAA satellite images and web-based ash reports
from the public.
Eruption plume:
Height (a.s.l.): Mainly ~ 7 - 9 km / 24,000 - 30,000 ft.
Heading: Southeast and east-southeast. There wind is calm over the volcano,
with wind speed ~10 m/sec at height over 7 km / 24,000 ft.
Colour: Grey.
Tephra fallout: Ash fall reported southeast of Eyjafjallajökull, from Skógar to Pétursey
on Mýrdalssandur
/media/jar/Eyjafjallajokull_status_2010-05-16_IES_IMO.pdf
northeast and later northwest by light southerly winds.
Heading: Northeast at first and later northwest.
Colour: Light grey, with a small amount of ash.
Tephra fallout: No reports of ashfall today. Reports from Neðri-Þverá and
Hlíðarendakot in Fljótshlíð of bluish gas in Fljótsdalur and along the hillsides in some
sort of clouds, smelling of rot (causing people headaches when dark in colour
/media/jar/Eyjafjallajokull_status_2010-05-21_IES_IMO.pdf