Home › Links › 2016: The Year in Volcanic Activity 2016: The Year in Volcanic Activity December 18, 2016 • Updated Mar 28, 2019 • Links, Photos • 1 min read Out of an estimated 1,500 active volcanoes, 50 or so erupt every year, spewing steam, ash, toxic gases, and lava. Source: 2016: The Year in Volcanic Activity – The Atlantic