Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000geoji.140..568r&link_type=abstract
Geophysical Journal International, Volume 140, Issue 3, pp. 568-576.
Astronomy and Astrophysics
Astronomy
20
Earthquake Prediction, New Zealand, Seismicity
Scientific paper
The proposal that the moment release rate increases in a systematic way in a large region around a forthcoming large earthquake is tested using three recent, large New Zealand events. The three events, 1993-1995, magnitudes 6.7-7.0, occurred in varied tectonic settings. For all three events, a circular precursory region can be found such that the moment release rate of the included seismicity is modelled significantly better by the proposed accelerating model than by a linear moment release model, although in one case the result is dubious. The `best' such regions have radii from 122 to 167km, roughly in accord with previous observations world-wide, but are offset by 50-60km from the associated main shock epicentre. A grid-search procedure is used to test whether these three earthquakes could have been forecast using the accelerating moment release model. For two of the earthquakes the result is positive in terms of location, but the main shock times are only loosely constrained.
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