Indication of high pore-fluid pressures in a seismically-active fault zone

Details Indication of high pore-fluid pressures in a seismically-active fault zone Indication of high pore-fluid pressures in a seismically-active fault zone

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002geoji.151f...1c&link_type=abstract

Geophysical Journal International, Volume 151, Issue 2, pp. F1-F5.

Astronomy and Astrophysics

Astronomy

14

90°-Flips, Earthquakes, Fault Planes, High Pressures, Shear-Wave Splitting

Scientific paper

Polarisations of seismic shear-wave splitting observed above small earthquakes in Iceland are typically approximately NE to SW, parallel to the direction of maximum horizontal stress. In contrast, the polarisations of shear-waves at three new stations sited over the Húsavík-Flatey Fault, a major seismically-active transform fault in northern Iceland, are approximately NW to SE, orthogonal to the stress-aligned polarisations elsewhere. Modelling suggests that these 90°-flips in polarisations are caused by propagation through cracks containing fluids at high pore-fluid pressures within one or two MPa of the critical stress. These observations suggest that high pore-fluid pressures, which play a key role in earthquake source mechanisms, can be monitored by analysing shear-wave splitting above seismically-active fault planes.

Affiliated with

Also associated with

No associations

Rating

Indication of high pore-fluid pressures in a seismically-active fault zone does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Indication of high pore-fluid pressures in a seismically-active fault zone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Indication of high pore-fluid pressures in a seismically-active fault zone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-741056