2
3
1
1
M4.0-4.9
43
7
34
1
1
0
0
0
M>5.0
23
0
23
0
0
0
0
0
HB/HBT: Herðubreið and Herðubreiðartögl
TFJ: Tungnafellsjökull
Kverkfj.: Kverkfjöll
Kistufell: Cluster north of Bárðarbunga that was active during the first days
automatic: Automatically detected events in the whole country, number of events outside the Vatnajökull are comparably
/earthquakes-and-volcanism/articles/nr/3001/
in the SISZ are mostly from the year-
2000 seismic sequence, which also contains the three largest events in the data set (Jakobsdóttir
et al., 2002; Hjaltadóttir and Vogfjörd, 2005).
Figure 1. Map of SW Iceland showing the epicenters of the 46 earthquakes used in the
study, color coded according to origin time. The time scale is shown on the left. Most of
the events cluster in the Hengill region
/media/vedurstofan/utgafa/skyrslur/2009/VI_2009_012.pdf
intense than over land.
17
Figure 8. Occurrence of low-pressure centres, as a function of centre depression, per win-
ter (blue bars) and summer (red bars) season over the entire ocean or land area within the
study domain.
As shown in Figure 7, increasingly with longer time-scales, cyclones tend to cluster in three pre-
ferred regions within the study domain, with a low occurrence of MSLP minima
/media/vedurstofan/utgafa/skyrslur/2015/VI_2015_005.pdf
frequency
curve at each site of interest.
Different techniques can be used to identify homogeneous groups of watersheds such as ge-
ographic proximity, or more objective methods relying on the use of catchments climatic and
physiographic characteristics such as cluster analysis or the region of influence approach (Burn
1990) (see Crochet 2012b).
The regional estimation method transfers a dimensionless
/media/vedurstofan/utgafa/skyrslur/2014/VI_2014_001.pdf