Jakarta, Dec. 9 -- Indonesia's embassy in Tokyo urged its nationals in Japan to stay calm and alert after a powerful 7.5-magnitude earthquake struck off Aomori Prefecture late Monday, triggering brief tsunami warnings in the country's northeast.

In a statement posted on Instagram on Tuesday, the Indonesian Embassy (KBRI) reminded nationals that earthquakes are frequent in Japan and called on them to remain composed and attentive to official information.

The embassy urged Indonesians to monitor updates from Japanese media and follow instructions from local authorities at all times.

It also advised residents to study evacuation routes and prepare emergency bags containing essential documents, medicine, and sufficient cash.

As of 8:30 a....