Miyazaki Prefecture (宮崎県) — Earthquake Risk & History
Kyushu region · Based on HERP official data
Miyazaki faces the Hyuganada — the southwesternmost section of the Nankai Trough. 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 Hyuganada earthquake is 70–80%.
Fault Lines & Seismic Characteristics
Active Faults & Trenches
- Nankai Trough
- Hyuga-nada Fault
- Hyuga Fault
Seismic Characteristics
Miyazaki Prefecture faces the Hyuganada — the southwesternmost section of the Nankai Trough. The August 2024 M7.1 earthquake here triggered Japan's first-ever Nankai Trough Earthquake Caution temporary advisory. The Hyuganada section carries a 70–80% probability of an M7.6–8 event within 30 years.
Earthquake History
- M7.1
2024
Hyuganada earthquake — Japan's first Nankai Trough Caution advisory issued; tsunami advisory for Miyazaki coast
- M7.5
1968
Hyuganada earthquake — damage in Miyazaki and Oita; tsunami observed
※ Showing M6.5+ or historically significant events. Source: JMA database.
Future Probability — HERP Official Assessment
30-Year Probability (Official Figure)
Earthquake Research Committee 2023 assessment. The 2024 temporary advisory experience substantially strengthened Miyazaki's disaster response systems. On coastal visits, follow the immediate evacuation principle — move inland at the first strong shaking.
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
- ✅ Miyazaki Prefecture official disaster prevention page (Japanese) — includes shelter maps
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
-
Nankai Trough Caution advisory and Miyazaki Prefecture response
Japan's first Nankai Trough Earthquake Caution advisory, issued after the August 2024 M7.1, caused widespread social impact in Miyazaki — tourism cancellations, evacuation preparations. This experience revealed both strengths and weaknesses of Japan's Nankai Trough advisory system.
Source: 기상청·내각부 (2024) -
Tsunami evacuation guide for Miyazaki coast (Aoshima, Sunflower Beach)
Aoshima and Miyazaki's Pacific beaches are popular destinations — close to the Hyuganada and Nankai Trough. Tsunami can arrive quickly after a major earthquake. If strong shaking occurs: immediately move away from the coast to high ground. Tsunami evacuation hills and towers are located along the Miyazaki coast — note their positions before visiting.
Source: 미야자키현 방재과·미야자키시 (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.