In brief
A 5.9‑magnitude earthquake struck the sea near Ibaraki Prefecture early Monday, generating shaking felt in Tokyo and neighboring regions. The Japan Meteorological Agency reported a shallow 10‑km depth and a seismic‑intensity rating of 3, while a Facebook post cited a deeper 43‑mile focus and 37 injuries. No tsunami warning was issued.
A 5.9‑magnitude earthquake struck the waters east of Ibaraki Prefecture, near the coast of northeastern Japan, on Monday. According to the Japan Meteorological Agency, the quake occurred at about 1:52 p.m. local time, with a depth of roughly 10 km below the sea floor.
The shudder was felt across Tokyo and several surrounding prefectures. Residents in Tokyo reported buildings swaying and a brief feeling of pressure beneath their feet, while the Japan Meteorological Agency assigned a seismic‑intensity rating of 3 on its 0‑to‑7 scale in parts of Miyagi, Ibaraki, Fukushima and Tochigi.
In contrast, a post from Facebook said the earthquake struck around 2 a.m. local time beneath southern Ibaraki, at a depth of about 43 miles (roughly 70 km) below the earth’s surface. That post also mentioned that at least 37 people were injured as a result of the quake.
Both reports agree on the magnitude of the event but differ on the depth and timing. The Japan Meteorological Agency’s official data lists a shallow depth of about 10 km and a later time of 1:52 p.m., while the Facebook source cites a deeper focus and an early‑morning time.
Neither source reports any tsunami warning. The Japan Meteorological Agency specifically said a tsunami was not expected, and no alerts were issued by Japan’s tsunami monitoring system.
Emergency services in Tokyo and nearby areas remained on alert after the quake, directing residents to check for damage and ensuring that local hospitals were prepared for any medical emergencies.
Power and communication lines were largely unaffected, and most buildings in Tokyo reported no significant damage. Consequently, the national emergency alert system did not issue a hazard alert to the public.
The quake’s epicenter was located at a latitude of 36.2 degrees north and a longitude of 142.2 degrees east, placing it just offshore of Ibaraki Prefecture’s coastline.
Officials in Ibaraki Prefecture are monitoring the area for aftershocks, which are expected as the earth readjusts after a sudden release of seismic energy. The local government has urged residents in the hardest‑hit areas to remain calm and prepare for any additional tremors.
Japanese media coverage has focused on the seismic intensity and the lack of tsunami activity, highlighting the country’s advanced monitoring and alert systems. Many residents expressed relief that the quake, while noticeable, did not result in widespread damage or casualties.
At present, the national seismological office continues to update the public on aftershock sequences and any new information regarding the event. The Japanese government’s emphasis remains on ensuring safety and providing accurate data to prevent panic among citizens and visitors around the rapidly urbanized region surrounding Tokyo.