Cluster Analysis and Seismicity of The Samosir Using Machine Learning Approach

The earthquake activity in the past six months, 2021 in the island of Samosir, North Sumatra is quite active, as it’s located in the seismic region on the Toba Tuft. In this case, we have used a clustering approach to look at the likelihood of seismic activity in Samosir, North Sumatra, recorded by sensors in the seismic network installed in either the broadband or the new mini-region. Samosir quake cannot be classified as unidentified source based on earthquake source. In particular, it identifies a distribution of seismicity in Samosir by segmented activities using a cluster method. The result showed that the dominance of inland earthquakes in Samosir earthquake, North Sumatra varies swarm. The magnitude frequency distribution for the period from the 23rd of January to the 31st of May 2021 was dominated by earthquakes with small magnitude less than 4. A series of mostly small earthquakes without a discernible mainshock. They are usually of short duration, but may last for days, weeks or sometimes months. They frequently occur in the same places. Geothermal activity is associated with most of the swarms.