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Earth Surface Dynamics An interactive open-access journal of the European Geosciences Union
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ESurf | Articles | Volume 6, issue 2
Earth Surf. Dynam., 6, 467-485, 2018
https://doi.org/10.5194/esurf-6-467-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: From process to signal – advancing environmental...

Earth Surf. Dynam., 6, 467-485, 2018
https://doi.org/10.5194/esurf-6-467-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 14 Jun 2018

Research article | 14 Jun 2018

Dynamics of the Askja caldera July 2014 landslide, Iceland, from seismic signal analysis: precursor, motion and aftermath

Anne Schöpa et al.
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Acocella, V., Di Lorenzo, R., Newhall, C., and Scandone, R.: An overview of recent (1988 to 2014) caldera unrest: Knowledge and perspectives, Rev. Geophys., 53, 896–955, 2015. 
Aki, K.: Attenuation of shear-waves in the lithosphere for frequencies from 0.05 to 25 Hz, Phys. Earth Planet. In., 21, 50–60, 1980. 
Allen, R. M., Brown, H., Hellweg, M., Khainovski, O., Lombard, P., and Neuhauser, D.: Real-time earthquake detection and hazard assessment by ElarmS across California, Geophys. Res. Lett., 36, L00B08, https://doi.org/10.1029/2008GL036766, 2009. 
Allstadt, K.: Extracting source characteristics and dynamics of the August 2010 Mount Meager landslide from broadband seismograms, J. Geophys. Res.-Earth, 118, 1472–1490, 2013. 
Allstadt, K. and Malone, S. D.: Swarms of repeating stick-slip icequakes triggered by snow loading at Mount Rainier volcano, J. Geophys. Res.-Earth, 119, 1180–1203, 2014. 
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On 21 July 2014, a voluminous landslide entered the caldera lake at Askja, Iceland, and created tsunami waves inundating famous tourist spots. The high hazard potential of the site motivated our study in which we analysed seismic data and found a precursory tremor signal intensifying in the 30 min before the landslide. Our paper shows the potential of seismic monitoring techniques to detect precursory activity before a big landslide that could be used for an early-warning system.
On 21 July 2014, a voluminous landslide entered the caldera lake at Askja, Iceland, and created...
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