Source parameters of the MW= 6.1 1910 Adra earthquake (southern Spain)

Details Source parameters of the MW= 6.1 1910 Adra earthquake (southern Spain) Source parameters of the MW= 6.1 1910 Adra earthquake (southern Spain)

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003geoji.155..539s&link_type=abstract

Geophysical Journal International, Volume 155, Issue 2, pp. 539-546.

Physics

4

Scientific paper

We examine and model analogue recordings from 6 early mechanical seismographs for the 1910 June 16 earthquake at Adra, Southern Spain. Modern standard, time-domain analysis techniques were applied to the historical data to estimate the source parameters of the event:
The regional sparse network data were inverted for the deviatoric seismic moment tensor. The best moment tensor solution corresponds to a M0= 1.50 . 1018 Nm, MW 6.1 oblique strike-slip event at 16 km depth. Our preferred faulting solution is: strike 122°, dip 80°, rake -137°, in very good agreement with available neo- and seismotectonic data. The source time function of this earthquake was estimated by deconvolving recordings of a MW 5.5 aftershock that occurred the same day. The time function indicates a total rupture time of 4.5 s, corresponding to estimates for mainshock rupture length of 12 km, and stress drop of 29 bar.

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