A Look Inside One of Earth’s Most Dramatic Volcanoes

At 2 a.m., this photographer descended into an active volcano where miners extract sulphur from inside a blue-flame spewing crater.Friday, August 3, 2018

By As told to Nina Strochlic
This story appears in the August 2018 issue of National Geographic magazine.
Indonesia has 127 active volcanoes. Only the U.S. (168) and Russia (144) have more.


A volcanic dream: I’ve been wanting to document how people live and work in extreme environments, because that may teach us how to adapt to a changing planet. Mount Ijen in East Java, Indonesia, is an active volcano that contains an acidic lake and a sulphur mine. Deep in the crater, in air heavy with toxic gases, miners extract chunks of sulphur. They carry 150- to 200-pound loads to the rim and then down the mountain to sell to factories, which use sulphur in the manufacture of things like cosmetics and sugar.


Essential packing list: We landed in Java and drove for three days to reach Mount Ijen. While preparing for the trip, I learned that the sulphurous gas is unpredictable. Sometimes it’s so thick you can’t see or breathe. If that happens, I was advised, don’t panic—just wait for the wind to move it along.

  • Goggles
  • Water and energy bars
  • Heavy jacket for nighttime temperatures
  • Headlamp


Ready for launch: At the foot of the volcano, I rented a gas mask. From there we climbed to the mountain edge, where tourists flock after dark to see blue flames from the combustion of gases. But if you just take a beautiful picture of the flames, you miss the human story. The miners choose nighttime to descend into the crater and do their backbreaking labour because it’s cooler. I wanted to go into the mine. At 2 a.m. I followed them into the crater to spend the night.


Elevation of sulpur mine, in feet

Temperature of sulphuric gases released from the cracks

Mount Ijen’s last known eruption

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