Seismicity of Karangetang, during the period from 27 January to 3 February 2016 showed shallow volcanic earthquakes (VB) and tremor phases. The number of shallow volcanic earthquakes (VB) showed an increase, and is between 2 to 13 episodes per day. Many earthquakes indicating cracking of rock (lava dome) increased. If we look at the energy of volcanic earthquakes during the period from 27 January to 3 February 2016she did not show significant improvement
Volcanic activity around the eruption of the lava dome has not wavered. The earthquake tremor type and spasmodic tremor yet often recorded with maximum amplitude ranging around 0.5 mm, so that effusive eruptive activity will likely take place. The RSAM data increased on 8 September 2015, and then gradually decreased until November 6, 2015 and has seen an increase in return on December 18, 2015. During January 2016, the 2-fold increase in energy RSAM was influenced by an increase of shallow volcanic earthquakes (VB) until 26 January 2016.
Currently, the eruption of Karangetang is potentially effusive (lava flows) and pyroclastic avalanches (incandescent lava). We must remember the explosive eruptions as happened in September 2013 during which the top has been formed an unstable lava dome, making it easily destructible. Pyroclastic avalanches could occur when the lava dome that accumulates becomes unstable. Higher rainfall could trigger avalanches, especially in Kali Batuawang , Kali Keting and Kali Kahetang .
The results of the data analysis and visual and instrumental evaluations until February 3, 2016 18:00 have not shown an increase / decrease of major volcanic activity, so it is concluded that the level of activity of Karangetang remains at level III (SIAGA).
The level of activity will be reduced / increased again if there is a decrease / increase in volcanic activity and will be adapted to the level of the threat.
february 04, 2016. Karangetang , Indonesia :
Source : VSI
Photos : VSI .