Glacial long period seismic events at Katla volcano, Iceland
2009 (English)In: Geophysical Research Letters, ISSN 0094-8276, Vol. 36, L11402- p.Article in journal (Refereed) Published
Repeating long-period (lp) earthquakes are commonly8 observed in volcanic regions worldwide. They are usually9 explained in terms of a volcanic source effect or anomalous10 propagation through the volcano. Recently, large lp events11 have also been associated with the motion of massive ice12 streams. Our joint analysis of climatic and new seismic data13 shows that small lp events observed at Katla volcano, Iceland,14 are in fact related to ice movement in a steep outlet glacier and15 not, as previously thought, to volcanic intrusive activity. The16 over 13000 lp events recorded since 2000 are consistent in17 character and magnitude with seasonal changes of the glacier.18 As the current global warming trend could cause similar19 earthquake sequences at other glacier covered volcanoes,20 identifying them as glacial rather than eruption precursors21 is vital.
Place, publisher, year, edition, pages
2009. Vol. 36, L11402- p.
Mýrdalsjökull, Katla volcano, seismic tilt, vlp-signals, lp-signals, acceleration, static deformation
Earth and Related Environmental Sciences
Research subject Geophysics with specialization in Seismology
IdentifiersURN: urn:nbn:se:uu:diva-117549DOI: 10.1029/2009GL038234ISI: 000267000000004OAI: oai:DiVA.org:uu-117549DiVA: diva2:297898