The immense caldera of Mount Nemrut  •

Today’s Image of the Day from NASA Earth Observatory features an astronaut view of Mount Nemrut, a volcano located in eastern Turkey near Lake Van. Mount Nemrut is notable for its immense caldera, which was formed through a series of eruptions. The caldera, one of the largest in the world, now contains several lakes, including Lake Nemrut. 

“The eastern half of the caldera is partially filled by solidified lava flows from past eruptions. Snow cover present at the time of this photo accentuates pressure ridges that formed as the lava was flowing and cooling. These pressure ridges vary in size, thickness, and orientation due to the varying viscosity and flow direction of the lavas during eruptions,” said NASA.

“Lake Nemrut (Nemrut Gölü) occupies the western half of the caldera, creating a rough crescent shape that partially submerges the old lava flows. This freshwater lake, reaching up to 176 meters deep, is accompanied by a smaller lake at the upper-center of the caldera. This lake is fed by hot springs, which indicates ongoing geothermal activity beneath the caldera.”

Geologically, Nemrut is interesting because its eruptions have played a key role in shaping the local landscape. Its last major eruption occurred around 1441 AD, which indicates that it’s not currently active but is considered dormant. The area around Nemrut is known for its geothermal activity, including hot springs and fumaroles, suggesting that there is still significant heat beneath the surface.

The Nemrut volcano and its surroundings are not just of interest for geological reasons. The region has been recognized for its natural beauty, attracting tourists who are interested in hiking, bird watching, and exploring the unique volcanic landscapes. Over thousands of years, various civilizations have inhabited the region around Nemrut, leaving behind a wealth of archaeological sites.

In addition to its natural and historical significance, the Nemrut volcano has been the subject of scientific study, as researchers aim to understand more about volcanic activity in the region, the history of its eruptions, and the potential risks it may pose in the future.

Image Credit: NASA Earth Observatory

Like what you read? Subscribe to our newsletter for engaging articles, exclusive content, and the latest updates.


Check us out on EarthSnap, a free app brought to you by Eric Ralls and

News coming your way
The biggest news about our planet delivered to you each day