of rock are
being deposited in the Gígjökull basin; these blocks are probably solidified
lava from eruption. The electrical conductivity of Krossá and Steinholtsá
remains high (see reports from 28 and 29 April for details).
Conditions at eruption site:
Airborne radar surveys from TF-SIF show a well-formed crater. Lava is spreading northward
from the crater toward the head of Gígjökull. Ice
/media/jar/Eyjafjallajokull_status_2010-04-30_IES_IMO.pdf
Michelle Hofton, Dept of Geographical Sciences, University of Maryland, USA (Skype)
Sine Munk Hvidegaard, DTU Space, Technical University of Denmark
Tómas Jóhannesson, Icelandic Meteorological Office, Iceland
Jack Landy, University of Manitoba, Canada
Anne Le-Brocq, College of Life and Environmental Sciences - University of Exeter, England
Gary M. Llewellyn, Airborne Research and Survey Facility
/lidar/lidar-2013/participants/
). The ice caps are Eyjafjallajo¨kull (ca. 81 km2),
Tindfjallajo¨kull (ca. 15 km2) and Torfajo¨kull (ca. 14 km2). The DEMs were
compiled using aerial photographs from 1979 to 1984, airborne Synthetic
Aperture Radar (SAR) images obtained in 1998 and two image pairs from the
SPOT 5 satellite’s high-resolution stereoscopic (HRS) instrument acquired in
2004. The ice-free part of the accurate DEM from 1998
/media/ces/Gudmundsson-etal-2011-PR-7282-26519-1-PB.pdf
each time. Both are fully analysed to check for congruity.
Ambient air pumped for an hour into a ~10 litre aluminium container, thereby collecting a compressed sample of great volume, done weekly or semi-monthly depending on season. Various components are analysed, investigating the stability of atmospheric composition.
Twenty-four-hour samples of airborne particles blown from the sea
/pollution-and-radiation/pollution/components/
as detected by the weather radar
Radar monitoring of the plume height was supported by visual observations, on-site and from a network of web-cameras. Airborne observations allowed for detailed examination of the plume, and pilot reports proved to be an extremely useful aid in verifying the radar data. Furthermore, data from lightning sensors and radiosondes was used to supplement information
/earthquakes-and-volcanism/articles/nr/2072
station
Various scientists made use of the ideal location and good staff of Stórhöfði for their research for decades. University of Miami monitors airborne sulphur of biological origin, stemming from seasonal algae off the coast, as well as dust storms off the glacial outwash plains. State University of New York analyses compressed air samples from Stórhöfði, investigating stability of air
/pollution-and-radiation/pollution/
Earth quakes
Volcanic eruptions
ash cloud detection – threat to aviation
ash dispersion – threat to live stock and human health.
Meteorological monitoring and
forecast
IMO monitors and issues forecast for
land and sea
large airspace
IMO is a State Volcano Observatory
Pre - eruption activity
Eruption monitoring
Airborne volcanic ash
62 seismic stations
~70 GPS stations
~25 ISGPS
~45 other
/media/loftslag/Karlsdottir-Risk_analysis_IMO_SK.pdf
reached
the surface silently through a fissure which opened in Geldingadalur, offering
a spectacular sight.Figure 3. The first
airborne photograph of the eruption captured during its first hours at 23:03 (Photo:
Krístín Jónsdóttir).Kristín
Jónsdóttir, team leader for natural hazard monitoring at the IMO, says that the
eruption proved to be a great challange as to predict weather or when
/about-imo/news/the-small-eruption-in-fagradalsfjall-celebrates-six-months
reached
the surface silently through a fissure which opened in Geldingadalur, offering
a spectacular sight.Figure 3. The first
airborne photograph of the eruption captured during its first hours at 23:03 (Photo:
Krístín Jónsdóttir).Kristín
Jónsdóttir, team leader for natural hazard monitoring at the IMO, says that the
eruption proved to be a great challange as to predict weather or when
/about-imo/news/the-small-eruption-in-fagradalsfjall-celebrates-six-months/
characteristics:
Type of products: Airborne tephra, water transported tephra
Volcanic Explosivity Index Max: VEI 4; most freq: VEI 3-4; min: VEI 0
Column heights: No information
Duration of eruptions: Weeks to months
Bulk volume tephra (km3): Max: no information, aver: 0.1, min: no information
Fallout beyond 1000 km: No information
Tephra <63µm at 30 km No information
Bulk volume lava
/media/jar/Bardarbunga_kafli20140825.pdf