Non-double-couple earthquake mechanisms at the Hengill-Grensdalur volcanic complex, southwest Iceland

Geophysical Research Letters

Volumn 24, Issue 7, 1997, Pages 743-746

  Julian, B R ^a   Miller, A D ^a,b   Foulger, G R ^a,b  

^a U S GEOLOGICAL SURVEY   (United States)

^b DURHAM UNIVERSITY   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CRACKS; DATA RECORDING; FLOW OF FLUIDS; GEOLOGIC MODELS; SEISMOLOGY; SHEAR STRESS; TECTONICS; VOLCANOES; COMPLEX NETWORKS; FAULTING; GEOPHYSICS; TRANSFORM FAULTS;

CRACK CLOSURE; SHEAR FAULTING; TENSILE FAULTING;

EARTHQUAKES;

CRACK CLOSURE; EARTHQUAKE; FOCAL MECHANISM; NON-DOUBLE COUPLE MECHANISM; SHEAR FAULTING; TENSILE FAULTING;

ICELAND, GRENSDALUR; ICELAND, HENGILL;

AMPLITUDE RATIOS; DIGITAL RECORDING; FOCAL MECHANISM; PARTIAL COMPENSATION; SPREADING RIDGE; THREE COMPONENT; VOLCANIC COMPLEX; VOLUMETRIC COMPONENTS;

EID: 0031126387     PISSN: 00948276     EISSN: None     Source Type: Journal    
DOI: 10.1029/97GL00499     Document Type: Article

References (8)

1. Foulger, G. R., and D. R. Toomey, Structure and evolution of the Hengill-Grensdalur volcanic complex, Iceland: Geology, geophysics, and seismic tomography, J. Geophys. Res., 94, 17511-17522, 1989.
2. Foulger, G. R., The Hengill triple junction, SW Iceland: 2. Anomalous earthquake focal mechanisms and implications for process within the geothermal reservoir and at accretionary plate boundaries, J. Geophys. Res., 93, 13507-13523, 1988.
3. Foulger, G. R., and R. E. Long, Anomalous focal mechanism solutions: evidence for tensile crack formation on an accreting plate boundary, Nature, 310, 43-45, 1984.
4. Foulger, G. R., and B. R. Julian, Non-Double-Couple Earthquakes at the Hengill-Grensdalur Volcanic Complex, Iceland: Are they Artifacts of Crustal Heterogeneity?, Bull. Seismol. Soc. Am., 83, 38-52, 1993.
5. S structure of the Hengill triple junction and geothermal area, Iceland, and the repeatability of tomographic inversion, Geophys. Res. Lett., 22, 1309-1312, 1995.
6. Hudson, J. A., R. G. Pearce, and R. M. Rogers, Source type plot for inversion of the moment tensor, J. Geophys. Res., 94, 765-774, 1989.
7. Julian, B. R., Analysing seismic-source mechanisms by linear-programming methods, Geophys. J. R. Astron. Soc., 84, 431-443, 1986.
8. Julian, B. R., and G. R. Foulger, Earthquake mechanisms from linear-programming inversion of seismic-wave amplitude ratios: Bull Seismol. Soc. Am., 86, 972-980, 1996.