For the past several years, much of the volcanic activity at Pu`u `O`o has been located at vents on the southwestern flank of Pu`u `O`o cone. One of the most recent of these flank vents is the Martin Luther King (MLK) vent. On February 9, 2005, a apparent surge of lava to Pu`u `O`o resulted in an episode of spattering and fountaining from the MLK vent. The largest cone, before the event, was about 6-7 meters high. The fountain reached a height of about 10 meters.
