The 1978 Miyagi earthquake (1978年宮城県沖地震, 1978 nen Miyagi-ken-oki jishin) occurred at 17:14 local time (08:14 UTC) on 12 June. The epicentre was offshore of Miyagi Prefecture, Japan. It had a surface-wave magnitude of 7.7, JMA magnitude 7.4, and triggered a small tsunami. The earthquake reached a maximum intensity of Shindo 5 in Sendai and caused 28 deaths and 1,325 injuries.
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