Japan’s meteorological agency has issued a warning regarding the potential for a significant aftershock following a recent 7.7 magnitude earthquake that struck off the north-east coast. This quake triggered an evacuation order and initial warnings of tsunami waves reaching up to 3 meters (10 feet).
Evacuations and Tsunami Alerts
In response to the earthquake, thousands of residents were ordered to evacuate coastal areas and seek higher ground. The quake, which occurred in waters off Iwate prefecture, approximately 530 kilometers (330 miles) north of Tokyo, prompted tsunami warnings that were later lifted within hours. The highest tsunami wave recorded was 80 centimeters.
Despite the cancellation of the tsunami warnings, the meteorological agency cautioned that the risk of a stronger earthquake occurring within the next week is elevated. Officials indicated that the likelihood of a quake measuring 8.0 magnitude or higher is “relatively higher than during normal times.”
Impact and Response
Residents in areas closest to the epicenter, including Honshu and Hokkaido, were advised to remain vigilant. Tremors were felt as far away as Tokyo. In Hokkaido, tsunami alerts remained in effect for several hours after the quake struck at 16:52 local time (08:52 BST).
“As soon as we heard the earthquake alert, everyone ran downstairs,” said Chaw Su Thwe, a Myanmar national living in Hokkaido. “However, this time the shaking was relatively mild.”
Local authorities utilized loudspeakers to warn residents about the potential for a tsunami and to encourage them to stay alert. Some office workers were allowed to leave work early as a precaution. Japan’s Cabinet Secretary Minoru Kihara reported that while a number of bullet trains were affected and 100 homes lost power, there were no immediate reports of major damage or injuries.
More than 170,000 people across several prefectures were ordered to evacuate as part of the tsunami warning, which was the second-highest of three alert levels. Residents were instructed to leave coastal and riverside areas and move to higher ground or designated evacuation buildings. The Japan Meteorological Agency (JMA) emphasized the need for caution, stating, “Tsunami waves are expected to hit repeatedly. Do not leave safe ground until the warning is lifted.”
Japan’s geographical location along the Ring of Fire makes it susceptible to seismic activity, with approximately 1,500 earthquakes occurring annually. The country accounts for about 10% of global earthquakes measuring 6.0 magnitude or higher. The memory of the devastating 9.0-magnitude earthquake in March 2011, which resulted in a catastrophic tsunami and the Fukushima nuclear disaster, remains fresh in the minds of many residents.
Source: Original report