Sinabung Volcanic Eruption

Sinabung Volcanic Eruption April 15, 2018 at 08:27 WIB

1. Visual
   April 15, 2018 at 08:27 WIB volcanic eruptions occur with a height of 1,000 meters of ash column, weak winds are heading west – northwest. Aftershocks continued until 10:03 WIB. Occurring 13 times aftershocks with high smoke columns tend to decrease. Until now there has not been seen a hot cloud accompanying this eruption.
2. Seismic
   From seismic monitoring, the eruption earthquake was recorded starting at 08:27 WIB with a maximum amplitude of 46 mm for 602 seconds, and until now the eruption is still ongoing with a maximum amplitude shrinking to 20 mm.
3. Potential Threats
   a. Explosive eruptions are still possible to happen.
   b. The threat of heavy ash rain can reach > 3 km and depends on the direction and strength of the wind.
   c. Hot clouds of eruption have the potential to threaten the South – Southeast sector as far as 7 km and the Southeast – East sector as far as 6 km.
   d. The activity in the carbonate hole of the new fumaroles on the North slope (Lau Kawar) is still ongoing.
4. Steps that have been implemented
   a. Coordinating with relevant agencies: Government of Karo, BPBD Karo, Kualanamu Airport (Vona Report)
   b. Continuous monitoring of Sinabung Volcano activities.
5. Recommendation
   The citizen and visitors/tourists do not doing any activities within a 3 km radius of the summit, within 7 km of the South-Southeast sector of Mt. Sinabung, which is located in the open valley that have the potential to be hit by hot clouds. Including citizen whos living in: Gurukinayan-Simpang Sibintun / Batukejan Interchange market, Lau Benuken Tigapancur Bridge, Tigapancur-Pejumaan Village Tigabogor, Pintumbesi Village, and Jeraya Village, and within 6 km for the East-East sector of Mt. Sinabung in open valley that are also potentially hit by hot clouds. For Kutatengah villagers, as well as within 4 km of the North-East sector in KRB II which has the potential to be exposed to heavy ash rain, including the village of Kutagugung.

Sinabung Volcanic Eruption April 6, 2018 at 16:07 WIB

Visual
Observed gray smoke column eruption thick with a height of 5000 meters from the crater. This eruption was followed by a hot cloud of eruption that led to the south-west direction with a range of 3500 meters, the eruption ash spread south-west.

Seismic
From seismic monitoring, eruption earthquakes are recorded starting at 16:07 WIB with a maximum amplitude of 70 mm and until now the eruption is still ongoing with maximum amplitude decreasing up to 50 mm.

Potential Threats

1. Explosive eruptions are still possible to happen.
2. The threat of heavy ash rain can reach > 3 km and depends on the direction and strength of the wind.
3. Hot clouds of eruption have the potential to threaten the South – Southeast sector as far as 7 km and the Southeast – East sector as far as 6 km.
4. The activity in the carbonate hole of the new fumaroles on the North slope (Lau Kawar) is still ongoing.

Steps that have been implemented

1. Coordinating with relevant agencies: Government of Karo, BPBD Karo, Kualanamu Airport (Vona Report)
2. Continuous monitoring of Sinabung Volcano activities.

Recommendation
The citizen and visitors/tourists do not doing any activities within a 3 km radius of the summit, within 7 km of the South-Southeast sector of Mt. Sinabung, which is located in the open valley that have the potential to be hit by hot clouds. Including citizen whos living in: Gurukinayan-Simpang Sibintun / Batukejan Interchange market, Lau Benuken Tigapancur Bridge, Tigapancur-Pejumaan Village Tigabogor, Pintumbesi Village, and Jeraya Village, and within 6 km for the East-East sector of Mt. Sinabung in open valley that are also potentially hit by hot clouds. For Kutatengah villagers, as well as within 4 km of the North-East sector in KRB II which has the potential to be exposed to heavy ash rain, including the village of Kutagugung.

Sinabung Volcanic Eruption February 19, 2018 at 8:53 WIB

Increased seismicity G. Sinabung observed since February 17, 2018, with volcanic earthquakes being recorded (VA and VB) as many as 17 times, earthquakes Low Frequency (LF) 17 times, volcanic earthquakes Hybrid 1 events, and earthquakes avalanches 9 incident. On February 18, 2018, the seismicity is increasing, especially the kind of deep volcanic earthquakes (VA), which reached 49 times and 29 times avalanches quake. On February 19, 2018 starting at 00-06 WIB, volcanic earthquakes recorded (VA) 30 times and 19 times avalanches earthquake.

On February 19, 2018 at 08.53 WIB, an explosive eruption occurred with the eruption column height reaching 5000 meters from the top of Mount Sinabung. After this eruption, there was a hot cloud of eruption which was followed by a series of avalanche hot clouds of 10 events with a sliding distance of 4.9 km towards the south-southeast sector and 3.5 km to east-southeast direction. The shortest duration of the heat cloud is 195 seconds and the longest reaches 792 seconds. Impact of avalanches hot cloud was observed remained within the recommended emptied area by PVMBG. Distribution of volcanic ash to the south-southwest side. The area affected by volcanic ash up to 12:00 WIB is Tiganderket Village, Selandi Lama Village, Selandi Baru Village, Perbaji Village, and Payung to Munte Village, and the eastern sector of Kutarayat District. Until this report was made there was no information on victims due to the eruption of Mount Sinabung. Checking into the field to find out the impact of the eruption was still carried out by the Emergency Response Team. Coordination in the field was immediately carried out at the Sinabung PGA Post with the Karo Regent, Karo Regency BPBD, Karo District Police, TNI representatives, Simpang Empat Sub-District Head, Tiganderket Sub-District Head, Kutarayat Sub-District Head, Karo District Education & Culture Office, and Indonesia Red Cross of Karo Regency.

Source: Center for Volcanology and Geological Disaster Mitigation, Geological Agency, Ministry of Energy and Mineral Resources. WIB, Ir. Kasbani, M.Sc. Martanto, S.T.