In brief
A 5.9‑magnitude earthquake rattled the waters off Ibaraki Prefecture on Monday, with shaking reported in Tokyo and parts of Miyagi, Fukushima, and Tochigi. Japan’s Meteorological Agency confirmed a shallow depth of about 10 km and an intensity of 3, but a tsunami was not expected. A Facebook post from azpnews mentioned a similar tremor at 2 a.m., a slightly lower magnitude and claims of injuries, illustrating how different reports can vary.
A 5.9‑magnitude earthquake struck the ocean off Ibaraki Prefecture, east of Tokyo, on Monday at about 1:52 p.m. local time. The Japan Meteorological Agency said the quake was shallow, at a depth of roughly 10 km, and had a seismic‑intensity rating of 3 in several nearby prefectures.
Residents in Miyagi, Ibaraki, Fukushima, and Tochigi reported feeling the tremor, and the shaking was also felt in Tokyo. Despite the surge of energy, no tsunami warning was issued.
Another report on Facebook by a user named azpnews described a quake occurring around 2 a.m. local time beneath southern Ibaraki. That post recorded a magnitude of 5.7, a slightly different figure, and claimed at least 37 people were injured.
The discrepancy between the two sources underscores how early quake reports can vary before official data is finalized. Japan’s Meteorological Agency remains the most reliable source for the official magnitude, depth, and intensity.
At the time of the shaking, no tsunami warning or emergency alert was triggered. Authorities urged people to stay alert but confirmed no immediate danger to coastal areas or the capital city.

