Mozambique earthquake sequence of 2006: High‐angle normal faulting in southern Africa
Creator:
ZhaWan
Publisher:
Ame
Host:
We report source mechanisms for the six largest shocks of the Mozambique earthquake sequence of 22 February 2006. The main shock of this sequence is one of the largest ( M w ∼ 7.0) to occur in Africa over the past 100 years and its P waveforms alone are sufficient to show that north‐south trending normal faulting near the surface continues to depths of more than 15 km along an exceptionally steep dip of 76° ± 4°. This new result shows that globally seismogenic normal faulting spans a wide range of dips, from about 30° to 75°. S waveforms, when combined with a minor component of left‐lateral slip observed in the field, indicate the rake to be between −80° and −89° which, in turn, places a new constraint on relative plate motions: Complications from a nonspecific Rovuma microplate notwithstanding, our results favor the Euler pole between the Somalia and Nubia plates to lie southward of the epicenters.
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