Performance Review of the Global Seismographic Network for the Sumatra Andaman Megathrust Earthquake

Park, J, Butler R, Anderson K, Berger J, Benz H, Davis P, Hutt CR, McCreery CS, Ahern T, Ekstrom G, Aster R.  2005.  Performance Review of the Global Seismographic Network for the Sumatra Andaman Megathrust Earthquake. Seismological Research Letters. 76:331-343.: Seismological Society of America, 201 Plaza Professional Bldg , El Cerrito, CA, 94530, USA, [URL:]


26: Seismic Engineering (CE), Article, Civil Engineering (CE), Earthquake Engineering (EQ), Sea beds, Seismic phenomena


On 26 December 2004, a 1,200-km length of seafloor boundary between the India Plate and Burma microplate ruptured in the Sumatra-Andaman earthquake. This earthquake was one of the five largest earthquakes of the past century and the largest in the past four decades. The SumatraAndaman earthquake is the first large tsunamigenic event and the first with an estimated Mw > 9 to be recorded by the Global Seismographic Network (GSN; Figure 1; Butler et al., 2004), as well as the observatories of the broader Federation of Digital Seismographic Networks (FDSN; Dziewonski, 1994). Earthquakes with Mw > 8 are commonly termed "great" earthquakes, but those with Mw > 8.7, not experienced on Earth since the 1960's, present hazards to lives and property that are far more extensive than a typical "great" earthquake. We therefore adopt the term "megathrust earthquake" after the common usage among paleoseismologists for exceptionally destructive earthquakes in the past (e.g., Priest et al., 2000; Cummins et al., 2001; Leonard et al., 2004).