2009 L'Aquila earthquake region saw dozens of significant aftershocks following the main earthquake. The strongest, which hit at 19:47 CEST on 7 April, measured magnitude 5.3 and caused further damage. According to the Italian National Geophysics Institute director Boschi, the aftershock epicentres migrated south-east, thus lessening the risk of further major shocks near populated areas. Aftershocks caused safety problems for rescue crews searching for injured victims trapped in precarious structures in the historic center of L'Aquila, a medieval city. Using cranes and backhoes to remove loose bricks and broken timbers, the crews were aware that even a small aftershock could have triggered the
April 2011 Fukushima earthquake Tōhoku earthquake. Ever since the earthquake triggered their reactivation, the Shionohira and Yunodake faults have provided essential data for local geological surveys on regional land deformation, sedimentary rock distribution and landslide vulnerability. In the earthquake's aftermath, Professor Yagi Hiroshi from the Faculty of Education, Art and Science noted that "a possibility exists for widespread aftershocks of the same size to occur in the near future." April 2011 Fukushima earthquake The was a potent magnitude 6.6 M intraplate aftershock that occurred at 17:16 JST (08:16 UTC) on 11 April in the Hamadōri region of Fukushima, Japan. With a shallow focus of