Immediately following the 2004 Indian Ocean earthquake , a seismic gap analysis of the seismic zones around the Pacific Ocean identified the Central Kuril segment of the Kuril-Kamchatka Trench subduction zone as the most likely to give rise to a major earthquake . This zone , 500 km in length , at that time had experienced no major earthquake since 1780 , but was bounded to north and south by segments that had moved within the last 100 years . The Mw = 8.3 earthquake of 15 November 2006 and the = 8.2 earthquake of 13 January 2007 occurred within the defined gap
earthquake of 15 November 2006
2006 Kuril Islands earthquake
Seismic gap