Indonesian volcano critical phase not over: scientists

Volcanologist Agus Budianto said "tremors had calmed down from Mount Kelut since yesterday (Friday) but other indicators still show increasing magmatic pressure from the volcano's belly."

Sensors sending real-time information from the mount's peak showed increased temperatures at the crater, he told AFP.

Tremors rocked Mount Kelut, a 1,731-metre (5,712-foot) peak, for nearly an hour on Friday afternoon -- usually a precursor of an eruption -- said Kristanto, the top volcanologist at the monitoring station.

"Since midnight we detected three tremors with the longest being less than one minute, however the volcano is still on high alert," he told AFP from his base about 7.5 kilometres (4.5 miles) from the crater.