Magnitude 6.1 earthquake hits off Japan's Iwate coast, no tsunami warning issued

A magnitude 6.1 earthquake struck off the northeastern coast of Japan near Iwate Prefecture early on Sunday morning, shaking parts of the region and nearby prefectures. The quake hit at 7:25 am local time at a depth of about 40 km, according to the Japan Meteorological Agency. No tsunami warning was issued, and there were no immediate reports of damage or casualties.

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The tremor was felt in Aomori Prefecture and other nearby areas, extending the impact beyond the immediate offshore epicentre. Officials said the earthquake occurred off the coast of Iwate Prefecture, which lies on Japan's Pacific side and is regularly affected by seismic activity. The agency also said further aftershocks remain possible.

The latest quake comes days after a stronger magnitude 7.2 earthquake struck the same region on Thursday. That earlier event was initially estimated at magnitude 7.0 before being revised upward to 7.2, underlining the volatility of seismic assessments in the immediate aftermath of major tremors. A separate magnitude 5.6 earthquake also shook Yamanashi Prefecture and surrounding areas near Mount Fuji on Friday, adding to a run of recent seismic activity in the country.

Japan sits along the seismically active Pacific Ring of Fire and is among the world's most earthquake-prone countries. That geography means even moderate offshore quakes can prompt close monitoring by authorities, especially when they follow a stronger event in the same area. The absence of a tsunami warning in this case reduced the immediate risk of coastal inundation, but the sequence of quakes has kept public safety concerns elevated.

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The recent string of earthquakes has also raised concern about landslides in vulnerable areas, particularly as the country moves through typhoon season. In Japan, heavy rain and unstable ground can compound the effects of seismic shaking, increasing the risk of secondary hazards even when direct damage is limited. The combination of weather and earthquake risk is one reason officials continue to warn residents to stay alert after major tremors.

What remains unclear is whether the offshore quake caused any delayed damage or minor injuries that were not immediately reported. Authorities are expected to continue monitoring for aftershocks and any changes in local conditions. The main focus now is on whether the region experiences further seismic activity in the coming hours and days.

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