Eruption at Deception Island, Antarctica, August 1970
The eruption in August 1970 in the South Shetland Islands, Antarctica, was the most violent explosion that has occurred over the past four years of recent activity. Fine-grained salty tephra of mugearite composition was spread over the northern half of the 14 km-wide island from 5 maar-type marine craters and 7 land vents. One land crater was developed in glacial ice. Further activity is anticipated.