Magnitude 9.0 Sumatra-Andaman Islands Earthquake

30 כי I INDIAN OCE AN YANMAR BURNA EURASIA PLATE Andaman Islands BURMA MICROPLATE INDIA PLATE CH - П 50 100 ཀན་བཀངའནཔར་ད ANDAMAN SEA SUNDA PLATE THAILAN 100 - Main Shock EXPLANATION 26 December 2004 Aftershocks through 29 Jan 2005 0 40-4.9 O 50-5.9 60-6.9 070-7.9 A Volcano es Faults (after Pubellier and others, 2004) Thrust ― Normal Strike-Slip Other 5 Strait of Malacos JOSUMATRA SCALE 111.com Muca Pig don 200 INDO Kalam μm Aftershocks of the M 9.0 Sumatra-Andaman Islands Earthquake of Dec 26, 2004 There have been 13 aftershocks of Magnitude > 6.0 since the main shock. The zone of aftershocks is over 1300 km long. Because aftershocks occur on and very near the fault planes of main shocks, the length of the aftershock zone suggests that main-shock fault-rupture may have extended north of epicenter by an amount significantly larger than 500 km. ■ However, a great earthquake may also trigger earthquake activity on faults that are distinct from the main-shock fault plane and separated from it by tens or even hundreds of kilometers. UMR

View entire presentation