In 2011, the Kizimen volcano in the Kamchatka peninsula of the Russian Far East began to erupt in an unusual way. After almost a century lying dormant, the ground began to shake with a series of earthquakes that formed a powerful, regular drumbeat.
Drumbeat earthquakes are rare although geologists have occasionally recorded them. However, this one was strange because the beat was steady for days but over time changed to a lower frequency with a more powerful “beat”.
