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 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 , the earthquake was centred inland about west of Iwaki, causing widespread strong to locally severe shaking. It was one of many aftershocks to follow the 11 March Tōhoku earthquake, and the strongest to have its epicentre located inland. The earthquake occurred as a result of normal faulting to the west of Iwaki and triggered numerous landslides across adjacent mountainous areas. A few fires broke