Authorities urge vigilance as risk of stronger quake rises following 7.7-magnitude seismic event
Tokyo, April 21: Japan has issued an urgent warning over the possibility of a major earthquake after a powerful 7.7-magnitude tremor struck off its northeastern coast, prompting precautionary evacuations and raising concerns about further seismic activity in the coming days.
The Japan Meteorological Agency (JMA) sounded the alert late Monday, cautioning that the likelihood of a quake measuring 8.0 magnitude or higher has increased following the offshore event. The earthquake occurred at approximately 4:53 PM local time in the Pacific Ocean near Iwate Prefecture.
Despite the epicentre being hundreds of kilometres away, tremors were widely felt, including in Tokyo, where buildings reportedly swayed. Authorities responded by advising over 180,000 residents in coastal areas to move to safer locations as a precaution against possible tsunami impact.
A tsunami wave of about 80 centimetres was recorded at Kuji Port roughly 40 minutes after the quake. Early reports indicate no significant damage to infrastructure or casualties, though officials have stressed that assessments are ongoing and the situation remains under close observation.
Chief Cabinet Secretary Minoru Kihara said initial findings show no immediate large-scale destruction but warned that hidden damage or delayed impacts cannot be ruled out. Emergency services have been deployed to monitor conditions and support local authorities.
Prime Minister Sanae Takaichi urged residents in at-risk regions to remain alert and follow official advisories, particularly in coastal zones where aftershocks or further tsunami activity could occur. Authorities have emphasised the importance of moving quickly to higher ground if warnings are issued.
Seismologists have warned that the risk of strong aftershocks remains elevated, especially within the next 48 to 72 hours. This period is considered critical for preparedness, as aftershocks following a major tremor can sometimes be nearly as powerful as the initial quake.
Japan’s vulnerability to earthquakes stems from its location along the Pacific Ring of Fire, a highly active seismic region where multiple tectonic plates converge. The country experiences roughly 1,500 earthquakes each year, making it one of the most seismically active nations in the world.
The latest alert has revived memories of the devastating 2011 Tohoku Earthquake and Tsunami, which triggered a massive tsunami and nuclear crisis, resulting in widespread loss of life and long-term environmental damage. Since then, Japan has strengthened its disaster preparedness systems, including early warning mechanisms and stricter building regulations.
While the current situation has not resulted in major damage, officials are maintaining a high level of caution. Authorities continue to monitor seismic activity closely and have urged the public to stay informed through official channels.
The coming days are expected to be crucial as experts assess whether the recent tremor is an isolated event or a precursor to a larger seismic occurrence.
Input & Images : Hindusthan Samachar
Edited by Madhusudhan Reddy
Last Updated on: Tuesday, April 21, 2026 11:58 am by News Proton Team | Published by: News Proton Team on Tuesday, April 21, 2026 11:58 am | News Categories: Trending, General