https://earthquake.sismologue.com/earthquake/earthquake/japan-kami-inada.xpwFz
An
earthquake with a magnitude of 4 occurred on Wednesday, January 18, 1984 at 9:50:46 PM UTC (and Thursday, January 19, 1984 at 6:50:46 AM local time) 5.55km (3.45 miles) away from
Kami-inada which is the nearest city to the epicenter.