and
calculated travel time differences for pairs of closely spaced earthquakes observed at a series of
recording stations. Each earthquake is paired with several other earthquakes and the best fitting
distances between them as a group are determined. Methods based on this kind of minimization are
called double-difference (DD) earthquake location algorithms
/media/norsem/norsem_begga.pdf
Iceland Seismic Zone. It was implemented in connection with the European REAKT project and lead
by Kristin Vogfjörð. We use cross-correlation and double difference methods from Ragnar Slunga. We
correlate new single automatic located events with waveforms of events from a high-resolution library
(catalog) of active mapped faults in the area and also from a library of well located single events
/media/norsem/norsem_gunnar.pdf
have started applying double-difference method of Waldhauser and Ellsworth
(2000), to improve earthquake location accuracy in the area.
On spatial resolution scale on the order of the size of the Southern Iceland Lowland (~70 km), we have
been able to measure velocity ratios at ~0.04–0.1% significance (1 σ) with the uncorrected SIL catalog
data. Preliminary results can be interpreted
/media/norsem/norsem_ingi.pdf
There is a double pulse cycle, or fluctuation, one takes hours and the other
takes between 10 and 20 seconds.
Seismic activity in Bardarbunga continues to be strong. The biggest earthquakes that was detected since noon on
Friday, were of magnitude M5,1 on Sunday, 23. November at 09:22 and this morning, 24. November, at 09:03 of
magnitude M5,4. In total 36 earthquakes bigger then M4,0 were
/media/jar/Factsheet_Bardarbunga_20141124.pdf
stages of adaptation policy
development (in an adaptive management setting) – the questions are listed below in
the textbox and in Annex 1.;
2. to produce a flowchart of an adaptation plan (outline) based on the ideas of adaptive
management (as synthesized in the ‘double loop model’) – see figure 1.
The first session started with an introduction to the sector / case considered, followed
/media/vedurstofan/NONAM_1st_workshop_summary_v3.pdf
6University of Washington,
Seattle, WA 98195, USA. 7NOAA Geophysical Fluid
Dynamics Laboratory, Princeton, NJ 08540, USA.
*Author for correspondence. E-mail: cmilly@usgs.gov.
An uncertain future challenges water planners.
Published by AAAS
on July 12, 201
1
www.sciencemag.or
g
Downloaded from
1 FEBRUARY 2008 VOL 319 SCIENCE www.sciencemag.org574
POLICYFORUM
combined with opera-
tions
/media/loftslag/Milly_etal-2008-Stationarity-dead-Science.pdf
absolute minimum in Iceland.
Precipitation
The precipitation was above normal. In Reykjavík it exceeded the 1961 to 1990 mean by about 13%. April was the wettest with more than the double normal amount. June and August were the driest. At Akureyri in the north the precipitation was about 30% above the mean. In the east the exceedance was even larger, up to 45% at Dalatangi, but not an absolute
/weather/articles/nr/2439
in Iceland. The minimum temperature was -27.8 degrees at Upptyppingar in the
northeastern inland on 8 December, close to the average annual absolute minimum in Iceland.
Precipitation
The precipitation was above normal. In Reykjavík it exceeded the 1961 to 1990 mean by
about 13%. April was the wettest with more than the double normal amount. June and August
were the driest. At Akureyri
/media/vedurstofan/utgafa/skylduskil/ved-eng-2011.pdf
The precipitation in Akureyri was unusually unevenly distributed during the year. There was almost no precipitation in January and June, but double the normal in February. There was also much precipitation in Akureyri in August and November.
Largest 24-hr precipitation
The largest 24-hr precipitation total was measured at Kvísker in the southeast on September 26, 179.4 mm. The largest 1-hour value
/about-imo/news/2011/nr/2112