Jökull - 01.01.2010, Blaðsíða 48

Martens et al.
17oW 16oW30´ 16oW 15oW30´
64oN50´
65oN
65oN10´
65oN20´
DDAL
DYNG
FREF
HELI
HERD
HETO
HOTT
HRUT
JOAF
KOLL
LOKA
MIDF
MOFO
MYVO
RODG
SVAD
UTYR
VADA
VIBR
VIKR VISA
ADA
BRU
HVA
VSH
MKO
KRE
Askja
Kverkfjöll
Upptyppingar
0 10km
V
NVZ
Figure 1. Map showing the network of 21 Cambridge University instruments (upright red triangles) plus six SIL stations
(inverted blue triangles) that comprise the Askja Seismic Network (ASN). Inset shows the maximum number of SIL net-
work instruments used by IMO to locate hypocentres during July 2007. The Cambridge University station DYNG has been
connected to the SIL network as station ASK. The white areas in the south of the main map are part of the Vatnajökull
ice cap (labelled ’V’ in the inset). The Northern Volcanic Zone (labelled ’NVZ’ in the inset) extends from the Vatna-
jökull ice cap north to the coast in a series of volcanic fissure swarms, indicated by the beige shading. Epicentres for the
6–24 July 2007 Upptyppingar events are shown as yellow dots. – Kortið sýnir 21 jarðskjálftamælistöð í neti Cambridge
háskóla (rauðir þríhyrningar) og 6 SIL-stöðvar (bláir þríhyrningar). Saman kallast netin "Askja Seismic Network" (ASN).
Á innfelldu myndinni sjást allar stöðvarnar, sem notaðar voru í SIL-kerfinu til að staðsetja skjálftana í júlí 2007. Cambridge
stöðin DYNG var seinna tengd SIL-kerfinu undir nafninu ASK. Nyrðra gosbeltið (NVZ á innfelldu myndinni) er í ljósbrúnum
lit, Vatnajökull (V) hvítum. Upptök skjálftanna 6.–24. júlí eru sýnd með gulum doppum.
quires high strain rates (Rubin and Gillard, 1998) that
Jakobsdóttir et al. (2008) suggest are generated by the
melt intrusion. This supposition is corroborated by
measurements of surface deformation that are consis-
tent with the inflation of a dipping dyke at mid-depth
in the crust (Hooper et al., 2009).
The seismic locations reported by Jakobsdóttir et
al. (2008) are derived from data acquired by the SIL
(originally an acronym for South Iceland Lowland)
system. SIL has served as Iceland’s national seismic
network since 1991 and is designed to acquire high-
quality data for earthquake prediction research and to
48 JÖKULL No. 60