A strong magnitude 6.3 earthquake occurred at 04:05:24 (UTC) on Wednesday, November 10, 2010, in the Southeast Indian Ridge region, about 2250 km SSW from Perth, Australia, at a hypocentral depth of about 10.7 km.
A strong magnitude 6.1 (Preliminary) earthquake occurred at 06:59:08 (UTC) on Friday, February 05, 2010, in the Southeast Indian Ridge region, about 2231 km SSW from Perth, Australia, at a hypocentral depth of about 14 km.
A strong magnitude 6.0 earthquake occurred at 01:04:42 (UTC) on Tuesday, January 13, 2009, in the Mid Indian Ridge region, about 775 km NNE of Rodrigues Island, Mauritius, at a hypocentral depth of about 10 km.
A strong magnitude 6.4 earthquake occurred at 18:39:09 (UTC) on Monday, December 08, 2008, in the southeast Indian Ridge region, about 2460 km SSW of Perth, Australia, at a hypocentral depth of about 10 km.
A strong magnitude 6.6 earthquake occurred at 04:37:55 (UTC) on Saturday, May 31, 2008, in the mid-Indian Ridge region, about 460 km SSE of Amsterdam Island, at a hypocentral depth of about 10 km.
A strong magnitude 5.9 earthquake occurred at 07:27:31 (UTC) on Friday, March 9, 2007, in the mid-Indian Ridge region, about 810 km SW of Diego Garcia, Chagos Archipelago, at a hypocentral depth of about 10 km.
A team of Japanese scientists said they had discovered one of the world's biggest lava plateaus under the Indian Ocean, using an unmanned undersea probe they developed. The plateau is located in the so-called Mid Ridge in the Indian Ocean below a point 800 kilometres east of Mauritius.
"This is presumed to be not only the biggest lava plateau in the Indian Ocean but also one of the biggest in the world. The vehicle also spotted hydrothermal eruptions on the northern part" - Professor Tamaki Ura, director of the University of Tokyo's Underwater Technology Research Centre.
The flat plateau measures about 14 kilometres in length and 2.7 kilometres in width at a depth of about 2,700 meters, according to the team from the university. The plateau is covered with lava some 300 metres thick. The team surveyed the area last month using the undersea vehicle, codenamed r2D4, which it has developed and used in several missions including observation of an undersea hydrothermal vent near the Mariana basin last year. The vehicle is equipped with high-performance sensors, and can probe seabeds by dodging obstacles and submerge as deep as 4,000 metres.
A strong magnitude 6.1 earthquake occurred at 08:55:17 (UTC) on Sunday, October 22, 2006, located on the southeast Indian Ridge, about 2295 km Southeast of Perth, Australia. The hypocentral depth was estimated to be 10 km.
