Powered by OpenAIRE graph
Found an issue? Give us feedback
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Norwegian Open Resea...arrow_drop_down
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
versions View all 2 versions
addClaim

Double-Difference Relocation and Empirical Green’s Function Analysis of Storfjorden Earthquakes

Authors: Tjåland, Norunn;

Double-Difference Relocation and Empirical Green’s Function Analysis of Storfjorden Earthquakes

Abstract

On 21 February 2008, an earthquake of magnitude Mw 6.1 occurred in Storfjorden on Svalbard. Since then, more than 2000 earthquakes have been recorded in this region. More recently, on 29 March 2016, an earthquake of magnitude Mw 5.2 occurred close to Edgeøya. This event marks the north-eastern extension of the earthquake sequence. In this study, in order to improve the initial hypocenter locations, the double-difference relocation method has been applied to earthquakes in the Storfjorden area. In addition, earthquake source parameters are derived applying the empirical Green’s function method. By using smaller earthquakes in the sequence as empirical Green’s functions, the effects from path, site and instrument are removed from the seismogram of a larger correlated earthquake by deconvolution. The earthquake relocation reveals at least four NE-SW trending structures, that are steeply dipping to the south-east. Faults of other directions are also indicated from fault plane solutions. However these are not resolved in the relocation of the earthquakes. Stress drop estimates reveal a decrease of static stress drop with decreasing seismic moment. This indicates that the seismicity in Storfjorden is attributed to a complex tectonic structure that is activated under the present state of stress. Moreover, the non-constant stress drop imply varying fault properties between larger and smaller earthquakes.

Country
Norway
Related Organizations
Keywords

550, 330, 756199

  • BIP!
    Impact byBIP!
    selected citations
    These citations are derived from selected sources.
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    0
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
Powered by OpenAIRE graph
Found an issue? Give us feedback
selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average
Green