Seismic activity related to the 2000 eruption of the Hekla Volcano, Iceland

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doi: 10.1007/s00445-005-0417-7
Authors:Soosalu, Heidi; Einarsson, Pall; Porbjarnardottir, Bergpora S.
Author Affiliations:Primary:
University of Iceland, Nordic Volcanological Center, Institute of Earth Sciences, Sturlugata, Iceland
Other:
Icelandic Meteorological Office, Iceland
Cambridge University, United Kingdom
Volume Title:Bulletin of Volcanology
Source:for the [Bulletin of Volcanology, 68(1), p.21-36. Publisher: Springer International] International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI), Heidelberg, Federal Republic of Germany. ISSN: 0258-8900
Publication Date:2005
Note:In English. 34 refs.; illus., incl. 3 tables, sketch map
Summary:A swarm of small earthquakes, which increased with time, was observed 80 min before the onset of the February 26 to March 8, 2000 eruption of Hekla. The size of the events increased with time. Low-frequency tremor in the 0.5-1.5 Hz band with dominant spectral peak(s) at 0.7-0.9 Hz detected at 18:19 GMT on February 26 marked the onset of the eruption. Although rising quickly to a very high level at the beginning of the eruption the tremor amplitude began to decrease after ∼1 hour. The seismic activity was similar to that observed in the previous eruption (1991). Data derived from the latter facilitated prediction of an eruption for the first time in 2000. Hekla is notorious for its lack of long-term warning of eruptions. It is possible that the occurrance of rare inter-eruption earthquakes under the Hekla edifice, and a little to the N of it, can help in long-term prediction by giving hints of strain build-up. [J.G.M.]
Sections:Physical properties of rocks and minerals
Subsections:Volcanology
Subjects:Earthquakes; Epicenters; Eruptions; Microearthquakes; Plate boundaries; Plate tectonics; Rifting; Seismicity; Seismograms; Strain; Volcanic earthquakes; Volcanism; Volcanoes; Atlantic Ocean; Europe; Hekla; Iceland; Mid-Atlantic Ridge; Western Europe
Coordinates:N634000 N644000 W0190000 W0220000
Abstract Numbers:06M/184
Record ID:2007060910
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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