X First to report: USGS after 6 minutes. 1 May 15:30: Magnitude recalculated from 4.7 to 4.9. Hypocenter depth recalculated from 25.0 to 0.1 km (from 15.5 to 0.1 mi). Epicenter location corrected by 5.6 km (3.5 mi) towards NNW. 1 May 15:37: Magnitude recalculated from 4.9 to 4.7. Hypocenter depth recalculated from 0.1 to 9.1 km (from 0.1 to 5.7 mi). Epicenter location corrected by 6.2 km (3.9 mi) towards S. Update Sat, 1 May 2021, 15:33 Moderate magnitude 4.9 quake hits 58 miles west of Elfin Cove, Alaska, United States in the morning 4.9 quake 1 May 7:23 am (GMT -8) An earthquake of magnitude 4.9 occurred in the morning on Saturday 1 May 2021 at 7:23 am local time near Elfin Cove, Hoonah-Angoon, Alaska, USA, as reported by the United States Geological Survey.