Fig. 1From: Precursory seismicity changes prior to major earthquakes along the Sumatra-Andaman subduction zone: a region-time-length algorithm approachMap of the Sumatra-Andaman subduction zone (SASZ; grey polygon) and the adjacent areas showing the epicentral distributions of the completeness mainshocks with a Mw ≥ 4.6 recorded during 1980–2014. The red stars are the major earthquakes with Mw ≥ 7.0Back to article page