The magnitude-7.4 earthquake which struck northeastern Japan on Wednesday is likely to have been caused by the temblor at the same location in February 2021, experts say, warning that strong seismic activity should continue in the area.The powerful quake off the Fukushima coast is considered to be an aftershock of the M9.0 quake in 2011 which devastated the same northeastern region and triggered the nuclear disaster, but its focus was much deeper at 57 kilometers below the seabed than 24 km 11 years ago.Experts suspect that the quake late Wednesday, which left three people dead and over 180…READ FULL ARTICLE