M2.3 earthquake 20km ENE of Willow Creek, CA

Magnitude

2.3 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Mon, Oct 4, 2021, 7:35 PM PDT

UTC

2021-10-05 02:35:45 UTC

Depth

36.2 km (22.5 mi), shallow

Epicenter

41.019° N, 123.423° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.5 km in depth

Magnitude uncertainty

±0.14

Depth from

From location

Station coverage gap

48°

Stations used

32

• Willow Creek, CaliforniaPopulation 1,710. Forecast20 kmENE
• Bayside, CaliforniaPopulation 17,132. Forecast57 kmENE
• Chico, CaliforniaPopulation 121,345. Forecast197 kmNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast899 kmNNW

After

1. 2.018km ESE of Willow Creek, CAMon, Oct 4, 9:05 PM PDT · 1826 days ago · 23 km deep · 15 km away
2. 1.84km E of Shasta, CATue, Oct 5, 4:00 AM PDT · 1826 days ago · 21 km deep · 94 km away
3. 2.54km ENE of Shasta, CAWed, Oct 6, 7:18 PM PDT · 1824 days ago · 22 km deep · 94 km away · felt by 3
4. 2.018km E of Rio Dell, CAWed, Oct 6, 7:40 PM PDT · 1824 days ago · 20 km deep · 72 km away
5. 1.818km E of Rio Dell, CAThu, Oct 7, 8:37 AM PDT · 1824 days ago · 20 km deep · 73 km away
6. 1.74km ENE of Shasta, CAFri, Oct 8, 1:06 PM PDT · 1823 days ago · 21 km deep · 94 km away
7. 2.17km SSE of Pine Hills, CAFri, Oct 8, 2:39 PM PDT · 1823 days ago · 25 km deep · 70 km away
8. 1.713km E of Hydesville, CAThu, Oct 14, 5:45 AM PDT · 1817 days ago · 24 km deep · 67 km away
9. 1.74km NNW of Ferndale, CASun, Oct 17, 7:20 AM PDT · 1814 days ago · 17 km deep · 85 km away
10. 2.26km NW of Redding, CAWed, Oct 20, 2:46 AM PDT · 1811 days ago · 20 km deep · 96 km away
11. 1.913km ENE of Hydesville, CAWed, Oct 27, 8:17 PM PDT · 1803 days ago · 21 km deep · 65 km away
12. 2.58km E of Willow Creek, CATue, Nov 2, 8:03 AM PDT · 1798 days ago · 26 km deep · 12 km away
13. 2.028km NE of Redway, CATue, Nov 2, 9:59 PM PDT · 1797 days ago · 27 km deep · 81 km away
14. 1.86km NNE of Petrolia, CASat, Nov 6, 8:33 AM PDT · 1794 days ago · 28 km deep · 100 km away
15. 2.86km NNE of Petrolia, CATue, Nov 9, 11:48 AM PST · 1791 days ago · 27 km deep · 100 km away
16. 1.62km WNW of Shasta Lake, CAWed, Nov 10, 10:19 AM PST · 1790 days ago · 23 km deep · 95 km away
17. 2.96km NNE of Petrolia, CAThu, Nov 11, 5:35 AM PST · 1789 days ago · 29 km deep · 100 km away
18. 2.516km SSE of Somes Bar, CAFri, Nov 12, 3:45 AM PST · 1788 days ago · 38 km deep · 26 km away
19. 2.36km ENE of Shasta, CATue, Nov 23, 12:23 AM PST · 1777 days ago · 22 km deep · 95 km away
20. 2.421km SSE of Willow Creek, CAWed, Nov 24, 1:26 AM PST · 1776 days ago · 21 km deep · 29 km away
21. 2.29km ESE of Willow Creek, CAWed, Nov 24, 10:18 PM PST · 1775 days ago · 22 km deep · 17 km away
22. 2.59km NNE of Hayfork, CASun, Nov 28, 12:56 AM PST · 1772 days ago · 31 km deep · 50 km away
23. 1.84km N of Hydesville, CAMon, Nov 29, 4:51 PM PST · 1770 days ago · 19 km deep · 74 km away

Before

1. 1.926km ESE of Rio Dell, CAWed, Sep 29, 8:49 AM PDT · 1832 days ago · 20 km deep · 74 km away
2. 2.318km E of Willow Creek, CATue, Sep 28, 9:05 AM PDT · 1833 days ago · 25 km deep · 7 km away
3. 2.021km WSW of Dunsmuir, CATue, Sep 28, 5:57 AM PDT · 1833 days ago · 21 km deep · 79 km away
4. 1.917km W of Humboldt Hill, CASun, Sep 26, 8:38 AM PDT · 1835 days ago · 21 km deep · 89 km away
5. 2.412km SE of Weitchpec, CASat, Sep 25, 1:54 AM PDT · 1836 days ago · 37 km deep · 18 km away
6. 1.612km ENE of Hydesville, CAFri, Sep 10, 4:08 AM PDT · 1851 days ago · 25 km deep · 66 km away
7. 1.64km W of Shasta Lake, CAThu, Sep 9, 6:27 PM PDT · 1851 days ago · 19 km deep · 93 km away
8. 1.63km WSW of Shasta Lake, CATue, Sep 7, 9:09 AM PDT · 1854 days ago · 17 km deep · 94 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73633511. Read Mon, Oct 5, 2026, 11:42 AM UTC.