Severny is a late-Quaternary Icelandic-type shield volcano located at the NW end of a major NE-trending graben along the crest of the northern Sredinny Range.  The 1936-m-high Severny is capped by a small stratovolcano.  A small shield volcano was constructed on its SW flank, and an even smaller shield grew on the NE flank.  The basaltic Tobeltsen cinder cone on the WSW flank and associated lava flows were erupted about 3500 years ago.