During the period from February to 13 March 2016, the G. Karangetang visually showed his incandescent lava dome at a height between 10 and 25 meters. From the main crater, white / blue, thin smoke, moderately high of about 25-150 m. He did not produce avalanche flow.
Seismicity is dominated by volcanic earthquakes shallow (VB), remote seismic tectonic events (TJ) , volcanic earthquake. Many tend to decrease, compared to the period from December 2015 to January 2016. The growth of the lava dome is still in progress, which is still characterized by the earthquake and tremor registration phases, with a maximum amplitude of 0.5 mm. Therefore, lava eruptions may occur in the coming days.
From the graph of volcanic energy earthquakes and seismic amplitude spectra from early February until 13 March 2016 this model seems stable, but was still higher than the normal value.
Satellite MODIS did not observe hot spot since March 8, 2016 indicating that the arrival of magma to the surface is not too large.
The results of the analysis and evaluation of visual and instrumental data until March 13, 2016 show a decrease in the level of activity. So the level of volcanic activity of Mount Karangetang is lowered from LEVEL III (Siaga) to LEVEL II (Waspada) this March 14, 2016 at 15:00 pm.
Intensive supervision is maintained to evaluate the activity of G. Karangetang and is being coordinated with the local government (DPDT regions).
The level of activity will be reevaluated if there is a change in volcanic activity and adapted to the level of the threat.
March 15 , 2016. Karangetang , Indonesia :
Source : VSI
Photo : Iyan Mulyana, 2007