3Earthquake in Indonesia/Indian Ocean By amonak Dec 26, 2004 Earthquake In Sumatra Islands, Indonesia. Magnitude 9.1 Mar 28, 2005 Earthquake In Northern Sumatra, Indonesia. Magnitude 8.6 May 26, 2006 Earthquake In Java, Indonesia. Magnitude 6.3 Sep 30, 2009 Earthquake Southern Sumatra, Indonesia. Magnitude 7.5