Alaska Earthquake Could Trigger 20-Foot Tsunami Waves Along Washington Coast
Alaska Earthquake Could Trigger 20-Foot Tsunami Waves Along Washington Coast
US · Published Aug 14, 2026
A new study by the Washington Geological Survey warns that a magnitude 9.2 earthquake in Alaska could generate tsunami waves reaching up to 20 feet along Washington's coast within 3.5 hours.
The study highlights potential flooding of up to 10 feet in areas such as Grays Harbor and Willapa Bay, with dangerous currents extending into the Strait of Juan de Fuca, Hood Canal, and the San Juan Islands.

Impact & Risks

The potential tsunami poses significant risks to coastal communities, boaters, and waterfront infrastructure. Fast-moving currents could endanger maritime activities and damage ports and marinas. Residents in low-lying areas face the threat of severe flooding, while prolonged tsunami activity could complicate rescue and recovery efforts. The study underscores the need for robust emergency preparedness in the region.

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