The Pacific rim has been extremely active. With any of these earthquakes, there is always worries for tsunamis. I can't see where one has been issued for Taiwan, so perhaps it was a minor disturbance at sea.

Aftershocks (click here) continue to rattle Taiwan after a strong earthquake that killed at least two people and injured more than 200 others.
The powerful 6.4-magnitude tremor struck at 23:50 (15:50 GMT) about 20km (12 miles) off the island's east coast.
Residents in the city of Hualien have been told to stay away from their damaged homes, and about 800 have taken shelter in community buildings.
Hualien, a popular tourist hub, is home to about 100,000 people.

This is less than a day of activity. Alaska just had a 7.4 at the end of January. The tsunami was 4 to 5 feet high.