On June 28, 2026, a magnitude 6.1 earthquake jolted the coast of Iwate Prefecture in northeastern Japan. No tsunami warning or risk was issued for the event.

Authorities urged residents to remain vigilant because of the ongoing seismic activity after the magnitude 6.1 earthquake, according to the Times of India. The Japan Meteorological Agency said the quake was caused by a reverse fault with a pressure axis running west‑northwest to east‑southeast, as reported by Hindustan Times. The Hindu noted that there were no immediate reports of damage or casualties.

Accounts differ on the quake’s magnitude. India and social‑media sources reported a magnitude 6.1 earthquake, while a Chinese source described a magnitude 6.0 earthquake that struck off Iwate Prefecture at 9 p.m. on Wednesday, according to the South China Morning Post. The South China Morning Post also said the magnitude 6.0 earthquake was the latest in a series of sizeable tremors.

The recent spate of quakes during typhoon season raised concerns about mudslides or landslides, according to Indian reports. Earlier in the week, a magnitude 7.7 earthquake struck off northern Japan, prompting a short‑lived tsunami alert, as reported by AP News. Following that event, authorities issued an advisory for an increased risk of a possible mega‑quake for northern coastal areas, and Prime Minister Sanae Takaichi warned residents to evacuate, also reported by AP News.