Overview

• The Krasheninnikov volcano erupted for the first time in roughly 450 years on August 3, sending ash 6,000 meters into the sky under an orange aviation warning.
• A magnitude-6.8 aftershock on August 3 marked the 66th recorded replica since the July 30 megathrust quake off Kamchatka’s coast.
• Eruptions at both Krasheninnikov and the already active Kliuchevskoi volcano underscore the region’s compound seismic and volcanic hazards driven by Pacific Plate subduction.
• Pacific-wide tsunami alerts and ash advisories from agencies including Russia’s Emergency Ministry and the Tokyo VAAC remain in effect as authorities maintain high vigilance.
• Continuous monitoring of seismic data, satellite imagery and ocean buoys is informing improvements to early warning systems and international coordination.