4) Summing up #PVSI for June & July reveals that 2018 had the 4th most activity since 1979.[1] 1984 - 41.9 σ x10^4[2] 2015 - 41.5 σ x10^4[3] 1986 - 41.1 σ x10^4[4] 2018 - 40.9 σ x10^4 ⬅️[5] 2014 - 37.9 σ x10^4[6] 2013 - 37.9 σ x10^4
-- Philippe Papin (@pppapin) August 4, 2018