Japan issued a tsunami alert on Monday evening after a powerful 7.6-magnitude earthquake struck off the northeastern coast, underscoring once again the intense seismic activity that defines the region. According to the United States Geological Survey, the earthquake was recorded 73 kilometres east-northeast of Misawa city. The tremor occurred at 7:45 pm local time and was measured at a depth of 53.1 kilometres, placing it within the shallow earthquake category that often results in stronger g