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The 17 July 2006 Java tsunami earthquake
Author(s) -
Ammon Charles J.,
Kanamori Hiroo,
Lay Thorne,
Velasco Aaron A.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl028005
Subject(s) - seismology , geology , tsunami earthquake , aftershock , trench , java , subduction , fault (geology) , thrust fault , foreshock , thrust , tectonics , computer science , programming language , chemistry , physics , organic chemistry , layer (electronics) , thermodynamics
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 × 10 20 Nm (M w = 7.8), M S (∼20 s) = 7.2, m b (∼1 s) = 6.2, while shaking intensities (3–10 Hz) were ≤ MMIV. The large tsunami relative to M S 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.