Anthony Kuhn

Anthony Kuhn, NPR News, Seoul.

If one of our patients brings in data from the wearable, it expands how much information we can look at.

The quake's magnitude was initially estimated at 7.5.

Its epicenter was off the country's east coast, about six miles below the sea's surface.

The quake was felt in buildings swayed in the capital, Tokyo.

Residents of some coastal areas in the country's northeast were ordered to evacuate to high ground.

Authorities warned of waves up to 10 feet high, but the first to reach shore were about 2.5 feet or less.

Some train services were suspended.

Nuclear power plants were checked, but no abnormalities were found.

The quake struck the same region where a magnitude 9 earthquake and tsunami killed around 20,000 people and caused meltdowns at the Fukushima Daiichi nuclear plant in 2011.

Anthony Kuhn, NPR News, Seoul.

South Korea's Joint Chiefs of Staff says the missiles were launched from around the east coast port city of Shinpo and flew eastward into the sea.

Japan also detected the launch.

North Korea conducted three missile tests earlier this month, including a missile with cluster bombs and a graphite bomb that disables electrical grids.

In February, North Korea listed new military capabilities it plans to develop over the next five years.

It includes AI-assisted drones, nuclear-capable cruise missiles, and anti-satellite weapons.

Pyongyang's biggest takeaway from Ukraine and Iran, though, is that its best insurance against being attacked is its nuclear arsenal.

Anthony Kuhn, NPR News, Seoul.

South Korea's Joint Chiefs of Staff says the missiles were launched from around the east coast port city of Shinpo and flew eastward into the sea.

Japan also detected the launch.