Miyakojima quake magnitude 6.4 triggers modest tsunami alert

On July 3 2026 at around 13:05 local time, a magnitude 6.4 earthquake occurred off the north‑west coast of Miyakojima in Okinawa prefecture, Japan. The Japan Meteorological Agency issued a tsunami forecast warning of slight sea‑level change, stating that the expected wave height is under 0.2 metres for both the Okinawa main‑island area and the Miyakojima‑Yaeyama region. The agency emphasized that there is no concern for damage despite the forecast.

The alert reflects precautionary measures following the offshore quake, but no immediate evacuations or injuries have been reported.