Тихоокеанская плита
On the border of the Pacific Plate and the Okhotsk and Philippine Sea Plates is one of the most active deep focus earthquake regions in the world, creating many large earthquakes including the 8.3 2013 Okhotsk Sea earthquake. As with many places, earthquakes this region are caused by internal stresses on the subducted Pacific Plate as it is pushed deeper into the mantle.