North Cerebus icefogger 4 years ago Semisopochnoi goes Orange; Photo credit Matt Loewen The North Cerebus crater at Semisopochnoi Island released a large ash plume on Sunday. It was the first confirmed emission since June 12. Semisopochnoi has no native land mammals, but it is home to over 1 million sea birds. Share this: Share on Facebook (Opens in new window) Facebook Share on Pinterest (Opens in new window) Pinterest Email a link to a friend (Opens in new window) Email