• journal_title：Lithosphere
• Contributor：Kristin L.H. Hughes ; Timothy Masterlark ; Walter D. Mooney
• Publisher：Geological Society of America
• Date：2011-
• Format：text/html
• Language：en
• Identifier：10.1130/L109.1
• journal_abbrev：Lithosphere
• issn：1941-8264
• volume：3
• issue：2
• firstpage：170
• section：SHORT RESEARCH

d="p-1">Two great earthquakes have occurred recently along the Sunda Trench, the 2004 M9.2 Sumatra-Andaman earthquake and the 2005 M8.7 Nias earthquake. These earthquakes ruptured over 1600 km of adjacent crust within 3 mo of each other. We quantitatively present poroelastic deformation analyses suggesting that postseismic fluid flow and recovery induced by the Sumatra-Andaman earthquake advanced the timing of the Nias earthquake. Simple back-slip simulations indicate that the megapascal (MPa)–scale pore-pressure recovery is equivalent to 7 yr of interseismic Coulomb stress accumulation near the Nias earthquake hypocenter, implying that pore-pressure recovery of the Sumatra-Andaman earthquake advanced the timing of the Nias earthquake by ∼7 yr. That is, in the absence of postseismic pore-pressure recovery, we predict that the Nias earthquake would have occurred in 2011 instead of 2005.