The Central Weather Bureau Seismological Center says Hualien has been rattled by 15 earthquakes since Wednesday and aftershocks are likely to continue.
No major damage or injuries have been reported from any of the quakes.
The first quake in the series had a magnitude of 4.2 and struck at 3:21AM and was centered 11.5-kilometers south southwest of Hualien County Hall, at a depth of 6.6-kilometers.
All of the 15 earthquakes were centered in either Shou-Feng township or offshore areas and two had a magnitude of over 5 on the weather bureau's intensity scale.
And the weather bureau is warning residents of Hualien that it's possible that minor aftershocks could continue to be felt over the next week.
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