By 1993, the split had extended laterally across 60 percent of the glacier. Fast ice is thick sea ice that remains attached to the shore where it may be anchored by grounded icebergs or coastal promontories. Shortly thereafter, the iceberg began to move and subsequently split into two sections. January 22, 2000. This image captures the Ninnis Glacier Tongue region soon after the initial calving.
Purple dots indicate the area where the iceberg broke away from the glacier.
February 5, 2000. February 20, 2000. By 20 February 2000, Bergs A and B had almost totally separated, rotated counterclockwise, and drifted to the north. Note that both sections are now well away from the Ninnis Glacier. According to Massom, the coastal changes resulting from the Ninnis disintegration are likely to have a significant impact on the behavior of regional sea ice.