WorldofArun ha aggiunto una foto al pool:
A HDR of the Caldera.
2 Exposures, Photomatix 3.0.
A volcanic depression is commonly called crater. A very large crater like this one at the summit of Kilauea is called a Caldera. At this point the Kilauea Caldera measures 2 miles across and 400 feet deep. Geologists believe that the reservoir of hot molten rock that feeds the volcano lies only 2 miles below.
January 6, 2010, Hawaii volcanoes National Park, Big Island, Hawaii. Satellite image of massive caldera.