The 2021 Fukushima-ken Oki (Fukushima Prefecture Offshore) earthquake (Japanese: 福島県沖地震, Hepburn: Fukushima-ken'Oki Jishin) was a very intense and deadly seismic event that struck offshore east of Tōhoku, Japan. The Mw  7.1 or MJMA  7.3 earthquake occurred on a Saturday night at 23:07 JST (14:07 UTC) on 13 February at a shallow focal depth of 51.9 kilometers (32.2 mi). It had a maximum JMA intensity of Shindo 6+ while on the Mercalli intensity scale, it earned a rating of VIII (Severe). The earthquake was followed by multiple aftershocks within less than an hour, three of which registering magnitude 5.3. The earthquake itself has been considered an aftershock of the 2011 Tōhoku earthquake which had occurred almost ten years prior.