This delightful feature is Lake Mashu, found within Akan National Park on Hokkaido Island, Japan.
The park is centered on a gigantic volcano, the Akan Volcanic Complex, which is composed of a number of mountains and lakes inside a 20-kilometer wide caldera.
The mountains within this park are volcanoes that have grown since the last major eruption. It also hosts several craters such as this one formed when eruptions emptied out magma chambers, a couple of which now hold crater lakes.
Lake Mashu sits within a volcanic crater and is roughly crescent-shaped, as a new volcanic cone has grown on the opposite shore not seen in this shot.
The lake is difficult to reach even for tourists due to the steep walls of the crater. It has no water supply from any rivers and is fed only by rainwater. The lake is often hidden by fog, but when visible, the rich color of the waters is sometimes referred to as “Mashu blue”.
Frozen in Time: Casts of Pompeii Reveal Last Moments of Volcano Victims
When archaeologists discovered the ancient Roman city of Pompeii, they
found the city almost entirely intact – loaves of bread still sat in the
oven, the remains of meals remained discarded on the pavement, and the
bodies of men, women, children, and pets were found frozen in their last
moments, the expressions of fear still etched on their faces.
Two months ago, we posted a story about Klyuchevskaya Sopka, abbreviated as Klyuchevskoi, the highest mountain in Russia’s Kamchatka Peninsula as well as the tallest active volcano in Eurasia. The two images are natural-color photographs of Klyuchevskoi, captured by the Operational Land Imager on Landsat 8, during the volcano’s eruption from January to March of this year. The second image shows a wider view of Klyuchevskoi’s mountainous surroundings as plumes of ash and smoke spurted from its mouth. The ash flows and thick clouds of smoke are much more prominent in the close-up image of the volcano’s mouth. The Kamchatka Volcano Eruptions Reaction Team (KVERT) — the Kamchatka Peninsula is host to at least 40 active volcanoes — had reported that Klyuchevskoi had expelled cinders more than 7,000 meters into the atmosphere, which had led to code red situations for all planes in the region.