Item talk:Q312310

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   "@type": "Article",
   "additionalType": "Journal Article",
   "name": "Type of faulting and orientation of stress and strain as a function of space and time in Kilauea's south flank, Hawaii",
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       "value": "70018975",
       "url": "https://pubs.usgs.gov/publication/70018975"
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       "value": 70018975
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       "value": "10.1029/96JB00651",
       "url": "https://doi.org/10.1029/96JB00651"
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       "value": "01480227"
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   "journal": {
     "@type": "Periodical",
     "name": "Journal of Geophysical Research B: Solid Earth",
     "volumeNumber": "101",
     "issueNumber": "7"
   },
   "inLanguage": "en",
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       "name": "Journal of Geophysical Research B: Solid Earth"
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   "datePublished": "1996",
   "dateModified": "2019-04-08",
   "abstract": "Earthquake focal mechanisms of events occurring between 1972 and 1992 in the south flank of Kilauea volcano, Hawaii, are used to infer the state of stress and strain as a function of time and space. We have determined 870 fault plane solutions from\u00a0P\u00a0wave first motion polarities for events with magnitudes\u00a0ML\u00a0\u2265 2.5 and depth ranging between 6 and 12 km. Faulting is characterized by a mixture of decollement, reverse, and normal faults. Most large earthquakes with magnitude\u00a0M\u00a0< 7 slip on reverse faults striking NE at 40\u00b0 and dipping SE between 60\u00b0 and 70\u00b0. In Hawaii, the earthquakes with\u00a0M\u00a0> 7 rupture the decollement plane, since it is the only surface large enough to generate magnitude 7 or larger earthquakes. The percentage of reverse faulting events is high compared to the decollement and normal faulting mechanisms for the period 1972\u20131983. The percentage of decollement type focal mechanisms becomes dominant after 1983. This pattern of faulting activity suggests that pressure was building up within Kilauea's rift zone prior to the 1983 Puu'Oo eruption. Overall, a single stress orientation with the maximum compressive stress oriented SE perpendicular to the rift and dipping at 45\u00b0 is compatible with the coeval existence of decollement, reverse, and normal faults. However, in a crustal volume east of longitude 155\u00b010\u2032W, we find a change of the orientation of \u03c31\u00a0from nearly horizontal to plunging 45\u00b0 SE occurring in 1979. This stress rotation suggests magma movements within the aseismic part of Kilauea's east rift zone. The strain and stress orientations are coaxial in the south flank except within the volume where the stress rotation is observed. We observe a change in the relationship between stress and strain directions caused either by the shifting of seismic activity from reverse faults to decollements, while stress stays constant, or by a rotation of stress, while strain remains constant. Assuming that the model of a noncohesive Coulomb wedge is appropriate for Kilauea's south flank, we find that high pore pressures are prevalent along the decollement and within the wedge for a coefficient of friction equal to 0.85.",
   "description": "18 p.",
   "publisher": {
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     "name": "AGU"
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   "author": [
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       "@type": "Person",
       "name": "Okubo, P.",
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       "familyName": "Okubo",
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         "value": "0000-0002-0381-6051",
         "url": "https://orcid.org/0000-0002-0381-6051"
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         {
           "@type": "Organization",
           "name": "Volcano Science Center",
           "url": "https://www.usgs.gov/centers/volcano-science-center"
         }
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     },
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       "@type": "Person",
       "name": "Wyss, M.",
       "givenName": "M.",
       "familyName": "Wyss"
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       "@type": "Person",
       "name": "Gillard, D.",
       "givenName": "D.",
       "familyName": "Gillard"
     }
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   "funder": [
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       "@type": "Organization",
       "name": "Volcano Hazards Program",
       "url": "https://www.usgs.gov/programs/VHP"
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       "name": "United States",
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       "name": "Hawaii"
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