Suruga Bay (駿河湾) — Earthquake Risk & History
Chubu region · Based on HERP official data
Suruga Bay is the known source zone of the Tokai earthquake — the northeasternmost section of the Nankai Trough. The deep bay shape amplifies tsunami waves approaching Shizuoka Prefecture's western coast.
Fault Lines & Seismic Characteristics
Active Faults & Trenches
- Nankai Trough (Tokai section)
- Suruga Trough
Suruga Bay is the known source zone of the Tokai earthquake — the northeasternmost section of the Nankai Trough. The deep bay shape amplifies tsunami waves approaching Shizuoka Prefecture's western coast.
Earthquake History
- M6.5
2009
Suruga Bay earthquake — Intensity 6-lower; damage in Shizuoka Prefecture
- M8.4
1854
Ansei Tokai earthquake — Suruga Bay tsunami
Future Probability — HERP Official Assessment
Long-term probability for this area is available on the HERP official website.
🔗 HERP Official Website →Traveler Safety Information
Finding Evacuation Shelters
- ✅ Search "避難所" (hinanjo) on Google Maps to find the nearest shelter from your current location
- ✅ Install NHK World or Safety tips (Japan Tourism Agency app) — both send English earthquake alerts
Basic Action Rules
- ✅ At check-in, locate emergency exits and escape routes
- ✅ On strong shaking: protect your head, open a door to secure an exit, do not use elevators
- ✅ Near coasts or rivers: move to high ground immediately — do not wait for a tsunami warning
- ✅ Emergency numbers: Police 110 · Ambulance/Fire 119
- ✅ Contact your embassy in Tokyo for emergency consular assistance
Research & Official Sources AI summary
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Suruga Bay and the Tokai earthquake probability
The Suruga Bay (Tokai segment) is assessed to have a high probability of an M8 Tokai earthquake within decades. The Japanese government classifies a full Nankai Trough combined rupture — which includes this segment — as the most severe earthquake threat.
Source: 지진조사위원회 (2023)
Related Guides
Seismic characteristics and research summaries on this page are AI-generated from publicly available data by JMA, Cabinet Office, and HERP. Historical earthquake data (year, magnitude, damage) is based on official records, but key figures should always be cross-checked with the latest official sources. This page does not predict future earthquakes.