Jökull - 01.01.2017, Blaðsíða 21
Zeinab Jeddi et al.
and B. Voight 1998. Seismicity associated with dome
growth and collapse at the Soufriere Hills Volcano,
Montserrat. Geophys. Res. Lett. 25, 3401–3404.
O’Neel, Sh. and W. T. Pfeffer 2007. Source mechanics
for monochromatic icequakes produced during ice-
berg calving at Columbia Glacier, AK. Geophys. Res.
Lett. 34(22). doi:10.1029/2007GL031370
Óladóttir, B. A., G. Larsen, T. Thordarson, O. Sigmarsson
2005. The Katla volcano S-Iceland: Holocene tephra
stratigraphy and eruption frequency. Jökull 55, 53–74.
Óladóttir, B. A., O. Sigmarsson, G. Larsen and T. Thord-
arson 2008. Katla volcano, Iceland: Magma compo-
sition, dynamics and eruption frequency as recorded
by Holocene tephra layers. Bull. Volcanol. 70(4), 475–
493. doi:10.1007/s00445-007-0150-5.
Roberts, M. J. 2005. Aerial and seismic observations of
the August 2005 jökulhlaup from Grænalón. Icelandic
Meteorological Office report 5022, 18 pp.
Roberts, N. S., A. F. Bell Andrew and I. G. Main 2015. Are
volcanic seismic b-values high, and if so when? J. Vol-
canol. Geotherm. Res. 308, 127–141.
Roux, P. F., D. Marsan, J. P. Metaxian, G. O’Brien and
L. Moreau 2008. Microseismic activity within a serac
zone in an alpine glacier. J. Glaciol. 54(184), 157–
168, doi:10.3189/002214308784409053.
Sgattoni, G. 2016. Characteristics and geological origin of
earthquakes and tremor at Katla volcano (S-Iceland).
Ph.D. thesis, 136 pp., University of Bologna, Bologna,
Italy and University of Iceland, Reykjavik, Iceland.
Sgattoni, G., Z. Jeddi, Ó. Guðmundsson, P. Einarsson,
A. Tryggvason, B. Lund and F. Lucchi 2016a. Long-
period events with strikingly regular temporal pat-
terns on Katla volcano’s south flank (Iceland). J.
Volcanol. Geotherm. Res. 324, 28–40, doi:10.1016/-
j.jvolgeores.2016.05.017
Sgattoni G., O. Gudmundsson, P. Einarsson and F. Luc-
chi 2016b. Joint relative location of earthquakes with-
out a predefined velocity model: an example from
a peculiar seismic cluster on Katla volcano’s south-
flank (Iceland). J. Geophys. Int. 207(2), 1244–1257,
doi:10.1093/gji/ggw331.
Slunga, R., S. Th. Rögnvaldsson and R. Bödvarsson 1995.
Absolute and relative locations of similar events with
application to microearthquakes in southern Iceland.
Geophys. J. Int. 123 (2), 409–419, doi:10.1111/j.1365-
246X.1995.tb06862.x
Soosalu, H., K. Jónsdóttir and P. Einarsson, 2006. Seis-
micity crisis at the Katla volcano, Iceland: signs of a
cryptodome? J. Volcanol. Geotherm. Res. 153(3-4),
177–186, doi:10.1016/j.jvolgeores.2005.10.013.
Spaans, K., S. Hreinsdóttir, A. Hooper and B. G. Ófeigs-
son 2015. Crustal movement due to Iceland’s shrink-
ing ice caps mimic magma inflow signal at Katla vol-
cano. Sci. Rep. 5, 10285, doi:10.1038/srep10285.
Stefánsson, R., R. Böðvarsson, R. Slunga, P. Einarsson, S.
Jakobsdóttir, H. Bungum, S. Gregersen, J. Havskov, J.
Hjelme and H. Korhonen 1993. Earthquakes predic-
tion research in the South Iceland seismic zone and
SIL project. Bull. Seismol. Soc. Am. 83(3), 696–716.
Sturkell, E., F. Sigmundsson and P. Einarsson 2003. Re-
cent unrest and magma movement at Eyjafjallajökull
and Katla volcanoes, Iceland. J. Geophys. Res. 108,
B82369. doi:10.1029/2001JB000917.
Sturkell, E., P. Einarsson, M. J. Roberts, H. Geirsson, M. T.
Guðmundsson, F. Sigmundsson, V. Pinel, G. B. Guð-
mundsson, H. Ólafsson and R. Stefánsson 2008. Seis-
mic and geodetic insights into magma accumulation
at Katla subglacial volcano, Iceland: 1999 to 2005.
J. Geophys. Res. 113, B03212, doi:10.1029/2006JB-
004851.
Thorarinsson, S. 1975. Katla og annáll Kötlugosa. Árbók
Ferðafélags Íslands, Reykjavík, 125–149.
Thordarson, T., D. J. Miller, G. Larsen, S. Self and H. Sig-
urðsson 2001. New estimates of sulfur degassing and
atmospheric mass-loading by the 934 AD Eldgjá erup-
tion, Iceland. J. Volcanol. Geotherm. Res. 108, 33–54.
Tryggvason, E. 1973. Seismicity, earthquake swarms and
plate boundaries in the Iceland region. Bull. Seismol.
Soc. Am. 63(4), 1327–1348.
Waldhauser, F. and W. L. Ellsworth 2000. A double-
difference earthquake location algorithm; method and
application to the northern Hayward Fault, California.
Bull. Seism. Soc. Am. 90, 1353–1368.
Wessel, P., W. H. F. Smith, R. Scharroo, J. F. Luis and F.
Wobbe 2013. Generic Mapping Tools: Improved ver-
sion released. Eos Trans. AGU 94, 409–410.
16 JÖKULL No. 67, 2017