As described in more detail in the Company's news release dated June 27, 2019, SGVC009 entered a sequence of lower-plate carbonate rocks at 412 metres, beneath alluvium on top of Tertiary ash-flow tuff,
volcanic mudflow breccia, and other volcaniclastic sediments.
Although the Construction Ministry could not confirm any mudflow in local rivers, authorities are remaining on alert for
volcanic mudflow as the mountain is covered in snow, and rain and snow have fallen intermittently in the area since Friday evening, they said.
Workers have found the largest two examples of standing trees buried by lava and
volcanic mudflow when nearby volcano Mt.
He said that archeologists were working under the assumption that the pillars had not been destroyed by a
volcanic mudflow hundreds of years ago, but had instead been removed by people.
Volcanologists plan to install three so-called ''acoustic flow measurement'' devices in rivers originating from the volcano for early detection of
volcanic mudflow.
People within the slope of the volcano, but outside the established "danger zones", were told to take precautionary measures against possible roof collapses due to accumulated ash and rainwater, and "lahar", an Indonesian term for a
volcanic mudflow.
Local disaster officials also warned of
volcanic mudflows known as lahar.