Hyuga-nada (日向灘) — Earthquake Risk & History
Kyushu region · Based on HERP official data
Hyuga-nada is the southwesternmost section of the Nankai Trough, east of Kyushu. The August 2024 M7.1 earthquake here triggered Japan's first-ever Nankai Trough Earthquake Caution temporary advisory. The 30-year probability of an M7.6–8 event is 70–80%.
Fault Lines & Seismic Characteristics
Active Faults & Trenches
- Nankai Trough (Hyuga-nada section)
- Hyuga Fault Zone
Hyuga-nada is the southwesternmost section of the Nankai Trough, east of Kyushu. The August 2024 M7.1 earthquake here triggered Japan's first-ever Nankai Trough Earthquake Caution temporary advisory. The 30-year probability of an M7.6–8 event is 70–80%.
Earthquake History
- M7.1
2024
Hyuga-nada earthquake — Japan's first Nankai Trough Caution advisory issued; tsunami advisory for Miyazaki
- M7.5
1968
Hyuga-nada earthquake — damage in Miyazaki and Oita; tsunami observed
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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Hyuga-nada and Nankai Trough combined earthquake risk
Hyuga-nada could serve as the starting point of a full Nankai Trough combined rupture. Japan's first Nankai Trough Caution advisory was issued after the 2024 M7.1, reflecting concern it may be a precursor. The 30-year probability of M7–8 in this zone is 70–80%.
Source: 지진조사위원회 (2024)
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.