Planet Briefing

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Magnitude 4.5 earthquake (Depth 35 km) Southeast of Honshu, Japan — 18 Sep 2026 08:39 UTC

GDACS reports a magnitude 4.5 earthquake at 35 km depth located southeast of Honshu, Japan on 2026-09-18 at 08:39 UTC. The alert is Green and the report states no people affected within 100 km.

Categories: severe-weather-and-natural-disasters

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence
8/10
Geographic reach
2/10
Global importance
3/10
Impact magnitude
3/10
Positivity
2/10
Urgency
2/10

Why it matters

This is a low‑to‑moderate seismic event with a Green alert and no reported people affected within 100 km, so immediate human impact appears minimal. It is relevant for local monitoring and situational awareness for residents and travelers in the affected region.

Location

Sources

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