At round 5:12 pm on the 14th, there was an earthquake with a seismic depth of three in Kozushima, Tokyo. Nine minutes later, there was an earthquake with a seismic depth of two in Shizuoka and Tokyo. There could also be some sea degree fluctuations alongside the coast of Japan on account of this earthquake, however there isn’t a concern about harm. According to observations by the Japan Meteorological Agency, all the epicenters have been within the waters close to Hachijojima with a depth of 10 kilometers. The magnitude of the earthquake is estimated at 5.6 at first and 5.9 later.
Source
Hachijojima close to sea earthquake No concern of harm on account of the potential of slight sea degree fluctuations | NHK
