lightning detection system, Satellite
images and web-based ash reports from the public.
Eruption plume:
Height (a.s.l.): According to a reconnaissance flight, the plume is estimated at 4
km/14,000ft. A light easterly wind blows the plume to the west
Heading: West.
Colour: Lightgrey and grey, with a small amount of ash to the west, according
to the reconnaissance flight.
Tephra
/media/jar/Eyjafjallajokull_status_2010-05-22_IES_IMO.pdf
are indicated as black stars and earthquakes with a magnitude over 4 as
white stars. Grey dots show earthquake activity in 1994-2017. Black triangles
show the location of seismic stations and the black arrows show the movement
across the Húsavík Flatey fault. Figure below:Displacements of the GPS
station in Grímsey in mm for North, East and Up directions are shown as a time
series for the past
/about-imo/news/grimsey-earthquake-swarm
show the locations of earthquakes since January 2018.
Earthquakes with magnitude larger than 4 are shown as black stars and the white
star indicates the location of the M5.2 earthquake.
The beachball (black/white ball) shows its focal mechanism, normal faulting.
Grey dots show seismicity over the period 1994-2017. The brown lines show
the Húsavík fault on-land and the black arrows
/about-imo/news/seismic-swarm-near-grimsey-update-15-00-19-february
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 alert
/earthquakes-and-volcanism/volcanoes/
continues to flow to the north under the ice cap, advancing ~1 km from the crater. Depressions in the ice-surface have formed due to lava being in contact with ice; these features have enlarged considerably since 24 April. The surface of Gígjökull is grey due to ash deposition; likewise, the north-western flank of Eyjafjallajökull is black in appearance.
Booming sounds were reported yesterday from
/about-imo/news/nr/1891
continues to flow to the north under the ice cap, advancing ~1 km from the crater. Depressions in the ice-surface have formed due to lava being in contact with ice; these features have enlarged considerably since 24 April. The surface of Gígjökull is grey due to ash deposition; likewise, the north-western flank of Eyjafjallajökull is black in appearance.
Booming sounds were reported yesterday from
/about-imo/news/2010/nr/1891
(~16,000 ft) between 12:00 and 14:00 GMT;
elevation of 3.9 km recorded at 17:40 GMT
[From aerial observations and radar measurements]
Heading: Eastwards at elevations above ~4 km (~13–14,000 ft)
Colour: Mostly white (steam) to the east of the crater, but grey tephra pulses above
the crater
Tephra fallout: No ash-fall reported, although light ash-fall possible over Mýrdalsjökull
Lightening
/media/jar/Eyjafjallajokull_status_2010-04-26_IES_IMO.pdf
through the IMO web site, a flight over the eruption site today,
information from commercial flights.
Eruption plume:
Height (a.s.l.): 18-20,000 ft/5.5-6 km around 08:00h (commercial flight). 15-17,000 ft
/4,5-5 km (according to scientists flying over the eruption site 12-
13:00h).
Heading: Southeast
Colour: Grey/light gray.
Tephra fallout: In Vík and nearest vicinity. Very small
/media/jar/Eyjafjallajokull_status_2010-05-08_IES_IMO.pdf