Publication Date:
2019-11-04
Description:
Based on the indicative modelling, the changes in Coulomb failure function (?CFS) suggest that the W-HV segment
and the T-P segment could be stable in at least the future 300 years and 190 years respectively, for these
periods should be needed to accumulate the stress released by the M 8.2 Wairarapa earthquake, assuming that
there is no influence from other sources, the earthquake did not alter the failure threshold, and that failure is a
fairly deterministic process. The results also show that the influence on the W-HV segment and T-P segment of
the Wellington Fault caused by the 1855, M 8.2 Wairarapa earthquake is significant considering that the average
fault rupture recurrence interval on the Wellington Fault is about 500-770 years. With our present understanding
of the Wellington and Wairarapa faults, it can be concluded that the 1855 Wairarapa earthquake retarded earthquake
occurrence on the W-HV segment and the T-P segment of the Wellington Fault. Thus the seismic hazard
in the Wellington region may be over-estimated.
Description:
Published
Description:
JCR Journal
Description:
open
Keywords:
Wellington region
;
changes on Coulombfailure stress
;
earthquake hazard
;
04. Solid Earth::04.04. Geology::04.04.01. Earthquake geology and paleoseismology
;
04. Solid Earth::04.07. Tectonophysics::04.07.05. Stress
;
04. Solid Earth::04.06. Seismology::04.06.11. Seismic risk
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
Format:
208211 bytes
Format:
application/pdf
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