JAKARTA, Nov. 25 (Xinhua) -- Mount Agung volcano in Bali resort Island of central Indonesia erupted for the second time on Saturday after the volcanologists downgraded its alert status, speewing a higher column of ash, a disaster agency official disclosed.

The eruption occurred 17: 30 p.m. local time (1130 GMT), spreading ash 1,500 meters to the sky, higher than that at the first eruption on Nov. 21 of 700 meters, spokesman of national disaster management agency Sutopo Purwo Nugroho said.

However, volcanologists said that there is no hike on seismic activity so far after they downgraded the alert status of the volcano to the second highest and narrowed no-go zone, said Sutopo.

"International Ngurah Rai airport operated normally and the tourism sector remains safe," he told Xinhua in a text message.

Over 200,000 foreign tourists visit the island every month, according to the national statistics bureau.

Mount Agung is situated in Karangasem district, some 70 km from tourist hub Kuta.

So far, Sutopo said that there were no immediate reports of damage and casualty caused by the eruption.

A total of 1,100 people were killed in the last eruption of the volcano in 1963.

Mount Agung is one of 129 active volcanoes in Indonesia, a vast archipelagic nation with 17,500 islands.