Japan’s highly active Sakurajima Volcano has erupted once again, sending a massive plume of ash 4.4 kilometers (nearly 3 miles) high into the atmosphere. The sudden eruption shook the Kagoshima region, prompting authorities to cancel over 30 flights and issue warnings to residents and travelers. Located on Kyushu Island, Sakurajima is one of the most closely monitored volcanoes in the world — and this latest explosion proves why. The eruption blanketed nearby towns with ash, reduced visibility,