The 17 July 2006 Java tsunami earthquake

Charles J. Ammon, Hiroo Kanamori, Thorne Lay, Aaron A. Velasco

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165 Scopus citations


The 17 July 2006 Java earthquake involved thrust faulting in the Java trench and excited a deadly tsunami (∼5-8 m) that inundated the southern coast of Java. The earthquake's size estimates vary significantly with seismic wave period: very long-period signals (300-500+ s) indicate a seismic moment of 6.7 × 1020 Nm (Mw = 7.8), Ms (∼20 s) = 7.2, mb (∼1 s) = 6.2, while shaking intensities (3-10 Hz) were ≤ MMIV. The large tsunami relative to Ms characterizes this event as a tsunami earthquake. Like previous tsunami earthquakes, the Java event had an unusually low rupture speed of 1.0-1.5 km/s, and occurred near the up-dip edge of the subduction zone thrust fault. Most large aftershocks involved normal faulting. The rupture propagated ∼200 km along the trench, with several pulses of shorter period seismic radiation superimposed on a smooth background rupture with an overall duration of ∼185 s.

Original languageEnglish (US)
Article numberL24308
JournalGeophysical Research Letters
Issue number24
StatePublished - Dec 28 2006

All Science Journal Classification (ASJC) codes

  • Geophysics
  • General Earth and Planetary Sciences


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