One (1) ( off/of) the largest earthquakes was the manitude 9.0 earthquake (2) ( in/at ) japan on march 11,2011. the jan 12,2010 7.0 magnitude earthquake (3) (in/on) haiti was the deadliest with the most fatalities in last 20 years. take a look (4) (at/on) the usgs seismicity maps (5) (for/to) wordwode earthquake activity.