The on-and-off volcanic eruption that’s been dazzling residents and visitors on Hawaii’s Big Island for nearly a year is back. Kilauea sent fountains of lava soaring 400 feet into the air on Tuesday. The molten rock was confined within Kilauea’s summit caldera inside Hawaii Volcanoes National Park. No homes were threatened. It’s the 37th time Kilauea has shot lava since last December, when the current eruption began. The latest lava display was preceded by sporadic spattering and overflows that began on Friday. Each eruptive episode has lasted about a day or less.