Magnitude 6.9 Earthquake Strikes Off Japan’s Iwate Prefecture
A powerful magnitude 6.9 earthquake has struck off the coast of Iwate Prefecture in northern Japan, with strong shaking reported across parts of Aomori and Iwate as emergency alerts were broadcast across the region.
The Japan Meteorological Agency recorded the quake at approximately 7.30am local time on Wednesday 25 June, with the epicentre located off the Iwate coast at a depth of around 50 kilometres. The JMA recorded shaking of upper 6 — described as “6-strong” on Japan’s seismic intensity scale — in parts of Aomori Prefecture, including the Sanpachi-Kamikita region, while lower 5 intensity shaking was felt along coastal and inland areas of northern Iwate. Miyagi and surrounding areas reported intensity levels of between 4 and 5, with tremors felt across a broad swathe of the region.
Residents across Iwate and Aomori took to social media platform X to share urgent accounts of the shaking, describing strong movement in homes and buildings as emergency earthquake alerts were broadcast simultaneously. Concerns were raised in coastal communities given the area’s proximity to the sea.
Minor sea level changes were possible along affected coastlines following the quake, and a small advisory was understood to have been issued as a precaution before being lifted. No major tsunami threat was reported, and no widespread casualties or structural damage had been confirmed at the time of writing.
The area lies near the Japan Trench, one of the most seismically active zones on the planet, and the site of the devastating magnitude 9.0 earthquake and subsequent tsunami in March 2011 that killed nearly 20,000 people. Aftershocks are considered likely following Wednesday morning’s event. The Japan Meteorological Agency and USGS are continuing to monitor the situation.
