• Question: How loud is a volcano

    Asked by zest366ham to Elena on 22 Nov 2019.
    • Photo: Elena Maters

      Elena Maters answered on 22 Nov 2019:

      Apparently the loudest sound ever in recorded history was when Krakatoa volcano in Indonesia erupted in 1883. The sound level was over 170 decibels even at a distance of 100 miles away from the volcano – compare that to the sound level of a jet engine which is about 140 decibels (and keep in mind that every 10 decibel increase makes something sound twice as loud to humans!). The eruption was so loud that it ruptured people’s eardrums 40 miles away and was even heard 3000 miles away. That’s like someone in Dublin, Ireland hearing a sound made in Boston, United States!