Summing up: 1) #volcanoes like #semeru create multiple, terrible hazards at once, 2) some of these cross borders so we’re all involved, 3) we should support volcanologists, 4) this was an eruption into a super-wet atmosphere which makes impacts worse and tracking harder. pic.twitter.com/gycEU5PZR2

— Andrew Tupper (@andrewcraigtupp) December 4, 2021