At 12:07 a.m. on Oct. 29, 2026, a 5.4‑magnitude earthquake struck near Chiba Prefecture, Japan, as reported by the Japan Meteorological Agency (JMA) and syndicated by Kyodo News.
The alert, issued by JMA, cited an epicenter near latitude 35.7, longitude 140.7, a depth of 50 kilometers, and a preliminary magnitude of 5.4, with a seismic intensity rating of Lower 5 out of a maximum of 7. Both Kyodo News outlets report the same figures, confirming the speed and consistency of the JMA’s assessment.
Kyodo News noted that the agency issued the notice quickly after initial detection, reflecting the automated alert system in place to warn local authorities and the public in real time. They emphasized that no tsunami warning was issued, consistent with the quake’s depth and the region’s geographic profile.
These reports demonstrate the JMA’s ability to provide rapid updates for moderate seismic events. Returning to routine monitoring, the agency continues to observe aftershocks and will issue further updates if conditions evolve.
