The explosion shook buildings for miles and happened in Sakurajima Minamidakein Kagoshima at 4:45p.m. on October 3rd. The smoke went 3000m above the mountain. The explosion of the caldera near the top of the mountain, which is one of two craters of Minamidake, last erupted on February 22nd. The shock-wave was huge and it was possible to hear the sound of the explosion in Kagoshima city which is on the other side of the ocean.