than 30,000 earthquakes at 5–7 km depth, advancing in short bursts at 0.3–4.7 km/h. Following each
surge forward, the seismicity behind the dyke tip dropped, implying that the subsequent dyke opening
was mostly aseismic. More detailed analyses of the seismic data recorded by a dense network around
the Vatnajökull icecap have revealed small magnitude, long-period (LP or B-type) events which
/media/norsem/norsem_bryndis.pdf
of this type may represent a serious risk if they occur in tourist spots such as the Askja region.
We present observations of the July 21st, 2014 event as recorded by the national infrasonic arrays
network installed in the country within the FUTUREVOLC European project. Infrasound released by
the event was recorded at a distance of 210 km from Askja volcano.
We performed 2D FDTD modeling
/media/norsem/norsem_giulia.pdf
of volcano-
tectonic structures are sets of parallel, northerly striking transcurrent faults that generate the largest
earthquakes in this zone, up to M 6.5. Their surface expressions are en echelon fracture arrays and
push-up structures. The sense of displacement is right-lateral. The distance between them varies from
0.5 to 5 km, and together they form a bookshelf-type fault system taking up the left
/media/norsem/norsem_palli.pdf
the last couple of days, but small pulses, mostly on the lowest frequency (0.5-1.0 Hz), were detected on the earthquake stations around the volcano. Eleven earthquakes were detected under the volcano yesterday, but 8 earthquakes were detected there 24 May. No significant deformation at sites around Eyjafjallajökull in the last couple of days.
Details in a status report issued collectively
/earthquakes-and-volcanism/articles/nr/1884
in Iceland
4.2.2016
Prepared by the meteorologist on duty 04.02.2016 18:36:
Strong gale or storm with moderate or extreme precipitation first in the southern part. Moderating in the southwestern parts by evening, in the southeast parts early morning
/about-imo/news/nr/3276
WNW of Straumnes and the ice was scattered.
Two observations from ships were received 29th November, on a strip at location 66°50´N - 24°36´W and at 67°00´N - 24°02´W. Wind directions were mostly from the northeast and the east, however southwesterlies occurred for a few days at the Greenland Strait
/sea-ice/monthly/2010/nr/2346
midnight and activity is since occurring in pulses with two to three hours in between. The strongest earthquakes detected since the onset of the swarm were M5.0 at 02:25 and M4.9 at 04:59 on the morning of 1 July.
Similar swarms have been recorded in previous years and have generally lasted up to a couple of days without resulting in an observable eruption. Indeed, the area is known for frequent
/about-imo/news/nr/3163
Type: Subglacial volcano with caldera
Summit ice cover: Yes
Dominant type of activity: Basaltic explosive, phreatomagmatic
Magma type: Basalt dominant
Known precursors: No information
Expected precursors: Significant increase in seismic activity
Monitoring level: High
Current seismicity: Seismic swarms from 16 August 2014. See http://vedur.is for live
information
Eruption
/media/jar/Bardarbunga_kafli20140825.pdf
.............................................................................................. 11
4 Recalculation of magnitudes and pgx-distance relations without near-source effect .. 12
5 Other predictor variables .............................................................................................. 19
6 Amplitude variations between stations and instrument type/media/vedurstofan/utgafa/skyrslur/2009/VI_2009_012.pdf
J600v berg 2.utg) were also used in this study.
Table 1. Main characteristics of river basins used in this study.
River Name Type Area Mean Percentage Mean annual Period
/ (km2) elevation glacier precipitation for
Gauging (m a.s.l) (mm) streamflow
station (1961-2014) data
vhm59 Ytri-Rangá L 622 365 0 1564 1961–2014
vhm64 Ölfusá L+D+J+S 5687 480 12.2 2003 1950–2014
vhm66 Hvítá (Borgarfirði) L+J 1577
/media/vedurstofan/utgafa/skyrslur/2015/VI_2015_009.pdf