Rock Falling Into Lava Lake Triggers Explosion | Video

<p> Atabout:2amHawaiitimeonApril28,arockfallsloughingoffthewallofHalema39;uma39;uCraterhitthemoltenlavabeneath,triggeringanexplosionofmagmafragments.Theblasttossedhotrocksontothecraterrim28feet85mabovethelavalake.</p>