During the period from 1 to 14 January 2016 visual observations of G. Awu were hampered by the fog blanket, and this summit was not observed.
Seismicity of G. Awu, during the period from 1 to 14 January 2016, has increased, especially the type of tectonic earthquakes, this last 3 days. The tectonic earthquakes were recorded in as many as 69 episodes per day. Until 14 January 2016 were recorded 46 events, while types of volcanic earthquakes VB were recorded with a maximum of 9 episodes per day. Based on the RSAM data for the period from 1 to 14 January 2016 it was noted an increase in energy on January 12, 2016, it is due to earthquake of January 12, 2016 occurred at 0h38 and 8h27 p.m. on a MMI scale I – II.
The potential dangers of G.Awu are as follows:
The character of recent eruptions of Mount Awu are as magmatic eruption, with steam explosions, volcanic gases and incandescent material. Following the eruption, may form a lava dome and fumarolics field of gas CO2 , H2S, N2 and CH4. These gases can be dangerous if they are above the threshold limit value. If there is a magmatic eruption, one must be aware of the risk of lava flow to the north and the southwest. Attention to the appearance of lahars during the rainy season, especially in the course of rivers that discharge from Mount Awu.
Based on the analysis / evaluation of volcanic activity, seismic and visual of G. Awu to the date of January 15, 2016, the level of activity of G. Awu is held at II (Waspada).
Intensive monitoring is ongoing to evaluate the activity of G. Awu.
If there is a decrease / increase in volcanic activity of G. Awu significantly, the activity level can be lowered / raised in accordance with the level of activity and threats.
The massive Gunung Awu stratovolcano occupies the northern end of Great Sangihe Island, the largest of the Sangihe arc. Deep valleys that form passageways for lahars dissect the flanks of the 1320-m-high volcano, which was constructed within a 4.5-km-wide caldera. Awu is one of Indonesia’s deadliest volcanoes; powerful explosive eruptions in 1711, 1812, 1856, 1892, and 1966 produced devastating pyroclastic flows and lahars that caused more than 8000 cumulative fatalities. Awu contained a summit crater lake that was 1 km wide and 172 m deep in 1922, but was largely ejected during the 1966 eruption.
January 17, 2016. Awu, Indonesie :
Sources : VSI, GPV
Photos : PVMBG , A Solihin .