<p>A magnitude 6.1 quake struck off Aomori in northern Japan on Tuesday, the national weather agency said, but no tsunami warning was issued.</p>.<p>The quake hit at 6:18 pm (0918 GMT) at a depth of 20 kilometres (12 miles), according to the Japan Meteorological Agency.</p>.<p>Major Japanese media outlets carried no immediate reports of damage or injuries.</p>.<p>The US Geological Survey put the magnitude of the quake at 6.2.</p>.<p>Earthquakes are common in Japan, which sits on the Pacific "Ring of Fire", an arc of intense seismic activity that stretches through Southeast Asia and across the Pacific basin.</p>.<p>The country has strict construction regulations intended to ensure buildings can withstand strong earthquakes, and emergency drills are routinely held to prepare for a major jolt.</p>
<p>A magnitude 6.1 quake struck off Aomori in northern Japan on Tuesday, the national weather agency said, but no tsunami warning was issued.</p>.<p>The quake hit at 6:18 pm (0918 GMT) at a depth of 20 kilometres (12 miles), according to the Japan Meteorological Agency.</p>.<p>Major Japanese media outlets carried no immediate reports of damage or injuries.</p>.<p>The US Geological Survey put the magnitude of the quake at 6.2.</p>.<p>Earthquakes are common in Japan, which sits on the Pacific "Ring of Fire", an arc of intense seismic activity that stretches through Southeast Asia and across the Pacific basin.</p>.<p>The country has strict construction regulations intended to ensure buildings can withstand strong earthquakes, and emergency drills are routinely held to prepare for a major jolt.</p>