English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  DetailsSummary

Released
Journal Article

Estimating Rupture Directions from Local Earthquake Data Using the IPOC Observatory in Northern Chile

Authors

Folesky,  J.
External Organizations;

Kummerow,  J.
External Organizations;

/persons/resource/asch

Asch,  Günter
2.4 Seismology, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/schurr

Schurr,  B.
4.1 Lithosphere Dynamics, 4.0 Geomaterials, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/sippl

Sippl,  Christian
4.1 Lithosphere Dynamics, 4.0 Geomaterials, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/tilmann

Tilmann,  F.
2.4 Seismology, 2.0 Geophysics, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Shapiro,  S. A.
External Organizations;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in GFZpublic
Supplementary Material (public)
There is no public supplementary material available
Citation

Folesky, J., Kummerow, J., Asch, G., Schurr, B., Sippl, C., Tilmann, F., Shapiro, S. A. (2018): Estimating Rupture Directions from Local Earthquake Data Using the IPOC Observatory in Northern Chile. - Seismological Research Letters, 89, 2A, 495-502.
https://doi.org/10.1785/0220170202


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_3015889
Abstract
Local seismic broadband recordings of the Integrated Plate boundary Observatory Chile (IPOC) are used to determine rupture directions for 60 M ≥ 5:0 events in the foreshock and aftershock series of the 2014 Mw 8.1 Iquique earthquake in northern Chile. The applied method is based on accurate measurements of the P-wave coda polarization, which exhibits systematic, azimuth-dependent variations with time as the earthquake rupture propagates. We demonstrate a general consistency with observations from teleseismic backprojection studies for the main event and its largest foreshock (Mw 6.7) and aftershock (Mw 7.6). A large portion of the here analyzed events show unilateral rupture behavior, with a predominance of down-dip (east) oriented directivity. This study documents the potential of retrieving rupture directions for M ∼ 5 earthquakes from a high-quality local seismic monitoring system.