A small increase in the activity of the volcano Semeru watched Indonesian Geological Survey in recent weeks and his danger level was raised to 3, to February 3, 2012 opastno code remained at 2.
For much of the last year there was not much activity:
— C 29 December to 15 January, recorded eight explosions and ash emissions by up to 600 meters.
— From January 15-29, were observed only weak explosions and small emissions of steam and ash on 25-50 meters
— Between January 30 and 31 explosions were recorded 5 to 400 meters.
— February 2 at 07:47 local time, a powerful explosion at a height of 750 m and caused a small lava flow at a distance of 2.5 km.
Increased activity has caused the need to increase the level of readiness for the next day. Local residents advised not to approach the volcano within a radius of 4 kilometers, climbers are prohibited from entering the zone to the crater of the volcano is closer than 1 kilometer.
As of February 6, significant changes have occurred.