Fig. 3From: Rise time and source duration of the 2008 MW 7.9 Wenchuan (China) earthquake as revealed by Rayleigh waves(Upper) Apparent source duration (red circles) and the period of spectral-node (blue circles) varies with station azimuth. (Lower) The estimation of rupture direction denotes the best azimuth of ∼59°, measured clockwise from the north at 1°-interval searching.Back to article page