On Thursday night, a violent magnitude 5.9 earthquake struck Tokyo, injuring more than 30 people, breaking underground water supplies, and disrupting trains and subways.

Local trains were delayed again on Friday morning, and people were pouring from stations.

The quake was centered in Chiba prefecture, just east of Tokyo, at a depth of around 80 kilometers, according to the Meteorological Agency (48 miles). A tsunami was not a possibility.

Buildings swayed violently, and hanging objects such as signs swung forcefully. According to Chief Cabinet Secretary Hirokazu Matsuno, there were no irregularities at nuclear power plants in the vicinity.

To avoid congestion, most trains ran on Friday morning, although with significant delays and admission restrictions. Outside of Shinjuku station in Tokyo, there was an extensive line, and hundreds of morning commuters were overflowing from Kawaguchi station.

The Fire and Disaster Management Agency reported that the tremor injured 32 individuals, three of whom were severely hurt.

According to police in Chiba prefecture, two women in separate locations sprained their ankles as they were flung to the floor during the quake, where 11 people were hurt. According to the disaster management agency, a commuter train partially derailed in eastern Tokyo when it came to an emergency stop, causing three people to fall and be mildly hurt.

Others were hurt in the prefectures of Kanagawa, Saitama, and Gunma.

About 250 residences in downtown Tokyo lost electricity, according to Tokyo Electric Power Company Holdings.

East Japan Railway Co. said "Shinkansen" super express trains in and out of Tokyo were paused for safety checks but later resumed service.

The Yamanote loop line and subways in Tokyo reopened late Thursday, although with significant delays. There was a lengthy queue of people waiting for taxis outside Tokyo's Shinagawa station, where local trains were briefly suspended due to power shortages.

Hundreds of people were stranded at train stations in Tokyo, Kanagawa, and Chiba, and some sought refuge at municipal facilities.

Many elevators, including those at Tokyo's metropolitan government building, stopped working automatically, trapping some individuals.

Underground water pipes were damaged in hundreds of locations across Tokyo, according to fire and disaster officials. Water was spilling from the ground in one district.

Fumio Kishida, Japan's new prime minister, issued a tweet advising people to "check the latest information and take action to protect your lives." He claimed it was the most powerful earthquake in Tokyo since March 2011.

Late Thursday, Kishida returned to his office to head the government's response.