Indonesian authorities declared a top alert status Sunday after a volcano on the main island of Java erupted, spewing a thick column of ash 1.5 kilometers into the sky.Japan's weather agency had warned a tsunami could arrive at the islands of Miyako and Yaeyama in Okinawa Prefecture following the eruption, which took place at around 11:18 a.m. Japan time. But it later said no tsunami occurred in Japan.Indonesian authorities raised the status from level 3 to 4 following the increasing activities of the volcano, Mt. Semeru in East Java Province.Related coverage:READ FULL ARTICLE