TEMPO.CO, Yogyakarta - Yogyakarta's Center for Investigation and Technology Development for Geological Disasters (BPPTKG) warned residents living near inactive volcanoes. His warning comes following the recent eruption of Mount Sinabung, a volcano that was "sleeping" for the last 400 years.
"B-type volcanoes still have the potentials to be active again," said head of Yogyakarta's BPPTKG, Subandriyo, Thursday, November 21.
Mount Sinabung is a type-B volcano, one that has been sleeping since 1600. Mount Lawu in Karanganyar, Central Java, is also categorized as a type-B.
"These mountains in geology are categorized as young mountains," said Subandriyo. Young mountains, he said, might be active again.
Mount Sindoro, also situated in Central Java remains as an active volcano to this date. But unlike Merapi, Sindoro has a more tame level of activity and no magma movement has been detected from it so far. Central Java also hosts Mount Slamet, a volcano with potentials to be active again. "When it will become active--there is no certainty."