The 1966 Hualien earthquake occurred on March 13 at 00:31 local time of Taiwan.

[3] The epicenter was located in the offshore area between Yonaguni Island, Japan and Hualien, Taiwan.

The magnitude of this earthquake was put at Ms 8.0, Mw 7.79,[6] MJMA 7.8, or ML 7.8.

The fault plane solutions of this earthquake suggested that there is a sliver of crust off the east coast of Taiwan other than the Philippine Sea plate.

The map of shallow earthquakes shows that the Philippines are encircled by a zone of seismicity.