Hokkaido shaken by 5.2 quake as Nemuro Trench mega-quake odds climb to 90%

17th January 2026 – (Hong Kong) A magnitude 5.2 earthquake rattled Hokkaido on Friday at 19:34 GMT, according to the GFZ German Research Centre for Geosciences. The tremor originated at a depth of 55km, with the epicentre plotted near 41.30°N, 142.83°E, giving northern Japan a firm reminder of its restless geology.

Fresh government risk modelling paints a starker long-term picture. Japan’s earthquake research committee now estimates a roughly 90% probability within 30 years of a major magnitude 7.8–8.5 event along the Chishima (Kuril) Trench off Nemuro—an increase from around 80%. The committee notes that these probabilities continue to rise until the anticipated rupture occurs.

Elsewhere around Hokkaido, the 30‑year likelihood of an M8.0–8.6 quake off Tokachi holds at about 20%, though the 50‑year outlook has risen to around 50% from roughly 40%. Along the Japan Trench, the chance of an approximately M7.4 event within 30 years off Miyagi Prefecture has edged up to 79–95% from 76–93%.

The appraisal also reflects ongoing aftereffects of the 1 January 2024 Noto Peninsula earthquake in Ishikawa Prefecture, a magnitude 7.6 shock tied to displacement on a long‑active fault near the peninsula’s northern coast. Low‑to‑moderate tremors—seismic intensity above 1 on Japan’s scale—continue to occur several times a month nearby, and the committee cautions that this elevated activity may persist for the time being.

For residents and travellers, the takeaway is as practical as it is sobering: keep emergency kits refreshed, know evacuation routes, and stay tuned to local advisories—particularly in coastal areas where tsunami awareness remains essential as probabilities climb toward that 90% threshold.