Japan has issued a tsunami alert following a strong earthquake off its northern coast, prompting evacuation orders in affected areas.

Context

The earthquake, measured at 7.4 magnitude, struck off the coast of Iwate prefecture and was felt in Tokyo, leading to widespread concern.S1S2

Key points

• The earthquake occurred off northern Iwate prefecture.S1

• Japan's Meteorological Agency reported a 7.5 magnitude for the quake.S2

• Residents in northern coastal regions have been urged to evacuate.S1

• The tremor was strong enough to be felt in Tokyo, hundreds of kilometers away.S2

• Tsunami warnings have been issued in response to the earthquake.S1S2

• Large buildings in Tokyo experienced shaking due to the quake.S2

• Authorities are monitoring the situation closely for further developments.S1

• Emergency services are on alert to respond to potential tsunami impacts.S1

Why it matters

• The earthquake's strength and location raise concerns about potential damage and casualties.S1S2

• Tsunami warnings can lead to significant evacuations and disruptions in affected areas.S1

What to watch

• Monitor updates from Japan's Meteorological Agency regarding tsunami developments.S1

• Watch for reports on the impact of the earthquake on infrastructure and communities.S2