The bottom of the crater has 25 m of diameter and has closed. Ash plume appear from northern wall crater, blew away to the south, low-high pressure. Around the crater was heard a noising sound. 1.10 m. Ash plume eject vertically, and the bottom of the crater has closed. Solfatara smelt low and was heard a low noising sound.
Material explosion contains ash and lapili.
Ash is in light grey color, felt around the crater with radius is about 10-20 m. Maximum diameter of lapili is 50 cm. Ash felt down around Salili and Beong village, meanwhile lava avalanche flowed to the east and west. Karangetang volcano is in level 2. No major change was shown in Lokon volcano. Seismograph recorded an increasing earthquake especially in volcanic earthquake.