Pu`u `O`o cone on February 18 shows a clear view of the crater toward the southwest. Since 1987, repeated collapses of the cone have formed a crater more than 400 m (1,300 ft) long and about 250 m (820 ft) wide. The crater has been as deep as 210 m (690 ft), but lava flows erupted in the past few years have nearly filled the crater. PHOTO COURTESY HAWAII VOLCANOES NATIONAL PARK.