Oh, yes. Depends on the avalanche's size (& location & etc.) - but (say) this one is hypothesized to have killed ~1/4 of the at-the-time population of Britain:

Oh, yes. Depends on the avalanche's size (& location & etc.) - but (say) this one is hypothesized to have killed ~1/4 of the at-the-time population of Britain: https://en.wikipedia.org/wiki/Storegga_Slide https://en.wikipedia.org/wiki/Storegga_Slide