M1.9 earthquake 72 km WSW of Adak, Alaska
A magnitude 1.9 earthquake struck 72 km WSW of Adak, Alaska on Thu, Oct 28, 2021, 2:26 PM HADT (23:26 UTC), 66 km (41 mi) below the surface.
A larger quake followed: M5.0 128 km WSW of Adak, Alaska. This one was a foreshock.
Map
Where this earthquake was located, with the others nearby. Select one for its page.
The earthquake
- Magnitude
- 1.9 (ml), micro
- Local time
- UTC
- 2021-10-28 23:26:45 UTC
- Depth
- 66.0 km (41.0 mi), shallow
- Epicenter
- 51.647° N, 177.619° W
- Region
- Alaska
- Tsunami flag
- No
- Status
- Reviewed by a seismologist
Did you feel it?
No one has reported feeling this quake to the USGS.
How well it is located
Reviewed by a seismologist.
- Stations used
- 13
Nearby
Within 100 km, magnitude 1.5 and up: 155 in the 60 days after this one and 62 in the 30 days before it.
After
- 1.752 km SW of Adak, Alaska · 1793 days ago · 38 km deep · 43 km away
- 2.949 km SSW of Adak, Alaska · 1793 days ago · 50 km deep · 61 km away
- 3.8119 km WSW of Adak, Alaska · 1793 days ago · 88 km deep · 47 km away
- 1.8147 km WSW of Adak, Alaska · 1792 days ago · 29 km deep · 76 km away
- 1.8135 km SW of Adak, Alaska · 1791 days ago · 26 km deep · 72 km away
- 3.775 km SW of Adak, Alaska · 1791 days ago · 35 km deep · 37 km away
- 2.228 km NNW of Adak, Alaska · 1790 days ago · 110 km deep · 75 km away
- 1.6Andreanof Islands, Aleutian Islands, Alaska · 1790 days ago · 8 km deep · 27 km away
- 2.076 km WSW of Adak, Alaska · 1787 days ago · 26 km deep · 17 km away
- 3.6108 km WSW of Adak, Alaska · 1787 days ago · 34 km deep · 39 km away
- 1.684 km W of Adak, Alaska · 1787 days ago · 13 km deep · 29 km away
- 1.5100 km WSW of Adak, Alaska · 1786 days ago · 22 km deep · 30 km away
- 1.560 km SSW of Adak, Alaska · 1786 days ago · 32 km deep · 51 km away
- 3.153 km SSE of Adak, Alaska · 1786 days ago · 35 km deep · 98 km away
- 2.5159 km WSW of Adak, Alaska · 1785 days ago · 72 km deep · 87 km away
- 1.7148 km W of Adak, Alaska · 1785 days ago · 13 km deep · 80 km away
- 3.128 km ESE of Adak, Alaska · 1785 days ago · 71 km deep · 93 km away
- 1.698 km SW of Adak, Alaska · 1785 days ago · 45 km deep · 36 km away
- 2.080 km WSW of Adak, Alaska · 1784 days ago · 26 km deep · 17 km away
- 1.853 km S of Adak, Alaska · 1784 days ago · 26 km deep · 76 km away
- 3.1161 km WSW of Adak, Alaska · 1783 days ago · 10 km deep · 88 km away
- 1.946 km SSE of Adak, Alaska · 1783 days ago · 40 km deep · 80 km away
- 1.9169 km WSW of Adak, Alaska · 1783 days ago · 21 km deep · 97 km away
- 1.862 km W of Adak, Alaska · 1783 days ago · 87 km deep · 19 km away
- 1.757 km SSE of Adak, Alaska · 1783 days ago · 16 km deep · 91 km away
- 1.655 km SSE of Adak, Alaska · 1783 days ago · 26 km deep · 100 km away
- 1.623 km SSW of Adak, Alaska · 1782 days ago · 62 km deep · 61 km away
- 1.768 km S of Adak, Alaska · 1782 days ago · 22 km deep · 79 km away
- 2.9132 km WNW of Adak, Alaska · 1782 days ago · 179 km deep · 91 km away
- 2.879 km WSW of Adak, Alaska · 1781 days ago · 35 km deep · 16 km away
- 2.5139 km SW of Adak, Alaska · 1780 days ago · 35 km deep · 72 km away
- 1.8130 km WSW of Adak, Alaska · 1780 days ago · 26 km deep · 60 km away
- 1.841 km W of Adak, Alaska · 1779 days ago · 90 km deep · 35 km away
- 3.8Andreanof Islands, Aleutian Islands, Alaska · 1779 days ago · 21 km deep · 59 km away
- 2.0138 km W of Adak, Alaska · 1779 days ago · 141 km deep · 79 km away
- 1.866 km SSW of Adak, Alaska · 1778 days ago · 31 km deep · 58 km away
- 1.5108 km SW of Adak, Alaska · 1778 days ago · 25 km deep · 51 km away
- 1.7119 km SW of Adak, Alaska · 1778 days ago · 26 km deep · 57 km away
- 1.7113 km WSW of Adak, Alaska · 1777 days ago · 18 km deep · 41 km away
- 1.745 km SW of Adak, Alaska · 1777 days ago · 47 km deep · 37 km away
- 2.0Andreanof Islands, Aleutian Islands, Alaska · 1777 days ago · 34 km deep · 24 km away
- 1.851 km SSE of Adak, Alaska · 1777 days ago · 33 km deep · 92 km away
- 1.7143 km WSW of Adak, Alaska · 1775 days ago · 24 km deep · 72 km away
- 1.571 km SW of Adak, Alaska · 1774 days ago · 38 km deep · 18 km away
- 1.6132 km WSW of Adak, Alaska · 1773 days ago · 23 km deep · 62 km away
- 1.5116 km WSW of Adak, Alaska · 1773 days ago · 28 km deep · 45 km away
- 1.7143 km SW of Adak, Alaska · 1773 days ago · 26 km deep · 75 km away
- 1.8139 km SW of Adak, Alaska · 1773 days ago · 22 km deep · 71 km away
- 1.9149 km WSW of Adak, Alaska · 1773 days ago · 24 km deep · 77 km away
- 5.0128 km WSW of Adak, Alaska · 1773 days ago · 48 km deep · 57 km away · felt by 1
- 2.8112 km WSW of Adak, Alaska · 1773 days ago · 22 km deep · 42 km away
- 1.7126 km WSW of Adak, Alaska · 1773 days ago · 13 km deep · 55 km away
- 1.6129 km WSW of Adak, Alaska · 1773 days ago · 25 km deep · 60 km away
- 1.7126 km SW of Adak, Alaska · 1772 days ago · 51 km deep · 58 km away
- 2.560 km SSW of Adak, Alaska · 1772 days ago · 35 km deep · 46 km away
- 3.248 km SSE of Adak, Alaska · 1772 days ago · 42 km deep · 92 km away
- 1.888 km WSW of Adak, Alaska · 1771 days ago · 14 km deep · 21 km away
- 1.9143 km WSW of Adak, Alaska · 1771 days ago · 23 km deep · 71 km away
- 2.156 km W of Adak, Alaska · 1771 days ago · 101 km deep · 19 km away
- 1.5136 km WSW of Adak, Alaska · 1770 days ago · -2 km deep · 65 km away
The first 60 of 155.
Before
- 3.6Andreanof Islands, Aleutian Islands, Alaska · 1794 days ago · 82 km deep · 68 km away
- 3.2118 km SSW of Adak, Alaska · 1794 days ago · 33 km deep · 94 km away
- 1.7100 km WSW of Adak, Alaska · 1794 days ago · 63 km deep · 28 km away
- 1.9123 km SW of Adak, Alaska · 1794 days ago · 22 km deep · 61 km away
- 1.740 km SSE of Adak, Alaska · 1795 days ago · 36 km deep · 86 km away
- 3.2141 km WSW of Adak, Alaska · 1795 days ago · 31 km deep · 70 km away
- 1.843 km SSE of Adak, Alaska · 1795 days ago · 37 km deep · 82 km away
- 1.843 km SSE of Adak, Alaska · 1796 days ago · 34 km deep · 90 km away
- 1.760 km W of Adak, Alaska · 1796 days ago · 89 km deep · 22 km away
- 1.7127 km WSW of Adak, Alaska · 1797 days ago · 7 km deep · 55 km away
- 2.0108 km W of Adak, Alaska · 1797 days ago · 83 km deep · 48 km away
- 1.8126 km WSW of Adak, Alaska · 1797 days ago · 11 km deep · 55 km away
- 1.9172 km WSW of Adak, Alaska · 1797 days ago · 22 km deep · 99 km away
- 2.072 km W of Adak, Alaska · 1797 days ago · 77 km deep · 13 km away
- 2.133 km ESE of Adak, Alaska · 1797 days ago · 62 km deep · 97 km away
- 1.854 km SW of Adak, Alaska · 1799 days ago · 43 km deep · 43 km away
- 1.8123 km WSW of Adak, Alaska · 1799 days ago · 17 km deep · 51 km away
- 1.7117 km WSW of Adak, Alaska · 1799 days ago · 29 km deep · 46 km away
- 3.1Andreanof Islands, Aleutian Islands, Alaska · 1800 days ago · 146 km deep · 67 km away
- 1.652 km SW of Adak, Alaska · 1807 days ago · 39 km deep · 41 km away
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Sources
From the USGS Earthquake Hazards Program and its partner networks, event ak021du6m3on. Read Sat, Sep 26, 2026, 9:45 AM UTC.