An oil leak occurred and caused heavy contamination of the port area.

[8][9] A large aftershock of magnitude Mw 7.1 or Ms 7.7 occurred on October 9, 1994, at 07:55 UTC.

[10] A numerical simulation of the tsunami suggested that the first wave was caused by a significant subsidence north of the Kuril Islands due to the earthquake.

[12] The tsunami run-up height was more than 3 m in Yuzhno-Kurilsk bay and 5 m in Zelenyi Island, Russia.

[7] The tsunami had a maximum runup height of 10.4 m (34 ft) at the southern part of Dimitrova Bay.