China Earthquake Networks Center officially measured that at 02:49 on April 27, a magnitude 5.3 earthquake occurred in the sea area of Hualien County, Taiwan (24.21 degrees north latitude, 121.77 degrees east longitude), with a focal depth of 27 kilometers.
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At 03:13 on April 27, a magnitude 4.0 earthquake occurred in the sea area of Hualien County, Taiwan (24.18 degrees north latitude, 121.73 degrees east longitude), with a focal depth of 25 kilometers.