Overview

• On August 9, the European-Mediterranean Seismological Centre recorded a 6.4-magnitude quake beneath the Kuril Islands and the National Center for Seismology reported a 6.1 tremor at 10 km depth.
• Authorities issued tsunami warnings that were rapidly downgraded to advisories and later lifted after no significant sea-wave activity materialized.
• No casualties or major damage have been reported in Russia’s far eastern territories despite the recent shaking.
• These events form part of an ongoing aftershock sequence triggered by a magnitude 8.8 earthquake off the Kamchatka Peninsula on July 30.
• The Kuril Islands lie along the Pacific-Okhotsk plate boundary at the Kuril-Kamchatka Trench, a hotspot for subduction-driven seismic hazards.