M2.2 earthquake 2km E of Pacheco, CA

Magnitude

2.2 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Wed, Dec 8, 2021, 9:21 AM PST

UTC

2021-12-08 17:21:50 UTC

Depth

15.6 km (9.7 mi), shallow

Epicenter

37.985° N, 122.052° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.2 km horizontally, 0.2 km in depth

Magnitude uncertainty

±0.12

Depth from

From location

Station coverage gap

42°

Stations used

73

• Concord, CaliforniaPopulation 128,667. Forecast2 kmWNW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast555 kmNW

After

1. 2.57km SW of Calistoga, CAFri, Dec 10, 8:17 AM PST · 1759 days ago · 7 km deep · 80 km away · felt by 30
2. 2.18km SW of Calistoga, CAFri, Dec 10, 2:13 PM PST · 1758 days ago · 8 km deep · 80 km away
3. 1.74km NNW of Larkfield-Wikiup, CAFri, Dec 10, 10:19 PM PST · 1758 days ago · 9 km deep · 88 km away
4. 1.63km SSW of Half Moon Bay, CASun, Dec 12, 2:24 AM PST · 1757 days ago · 10 km deep · 70 km away
5. 1.67km WSW of Lagunitas-Forest Knolls, CAMon, Dec 13, 6:35 AM PST · 1756 days ago · 5 km deep · 62 km away
6. 1.63km SE of Concord, CAMon, Dec 13, 10:51 AM PST · 1755 days ago · 12 km deep · 6 km away
7. 2.23km SSW of Half Moon Bay, CAMon, Dec 13, 1:48 PM PST · 1755 days ago · 10 km deep · 70 km away
8. 2.32km SW of Discovery Bay, CAMon, Dec 13, 4:01 PM PST · 1755 days ago · 18 km deep · 40 km away
9. 1.63km SSW of Half Moon Bay, CATue, Dec 14, 2:02 AM PST · 1755 days ago · 10 km deep · 70 km away
10. 1.89km NE of Morgan Hill, CATue, Dec 14, 6:31 PM PST · 1754 days ago · 2 km deep · 99 km away
11. 2.010km E of Alum Rock, CASat, Dec 18, 11:21 AM PST · 1750 days ago · 9 km deep · 76 km away
12. 2.01km N of Pacifica, CASun, Dec 19, 10:02 PM PST · 1749 days ago · 8 km deep · 55 km away · felt by 14
13. 1.71km WNW of Danville, CATue, Dec 21, 10:33 PM PST · 1747 days ago · 8 km deep · 18 km away · felt by 2
14. 1.91km NW of Danville, CAWed, Dec 22, 3:57 AM PST · 1747 days ago · 8 km deep · 18 km away · felt by 3
15. 1.62km NE of San Ramon, CAThu, Dec 23, 4:30 AM PST · 1746 days ago · 10 km deep · 23 km away · felt by 2
16. 1.85km NNE of Alum Rock, CAFri, Dec 24, 9:15 PM PST · 1744 days ago · 0 km deep · 67 km away · felt by 5
17. 2.34km NE of Fairview, CATue, Dec 28, 8:58 PM PST · 1740 days ago · 7 km deep · 31 km away · felt by 27
18. 1.75km NE of Larkfield-Wikiup, CAWed, Dec 29, 5:11 PM PST · 1739 days ago · 8 km deep · 86 km away
19. 1.52km S of Alamo, CAThu, Dec 30, 4:12 PM PST · 1738 days ago · 10 km deep · 17 km away · felt by 3
20. 1.56km W of Kenwood, CAThu, Dec 30, 11:05 PM PST · 1738 days ago · 6 km deep · 69 km away
21. 1.65km NE of Larkfield-Wikiup, CASat, Jan 1, 2:09 AM PST · 1737 days ago · 6 km deep · 85 km away
22. 2.19km E of Alum Rock, CASun, Jan 2, 5:42 AM PST · 1736 days ago · 9 km deep · 73 km away
23. 1.510km ENE of Milpitas, CAMon, Jan 3, 8:47 AM PST · 1735 days ago · 8 km deep · 61 km away
24. 2.62km SW of Colma, CATue, Jan 4, 3:18 AM PST · 1734 days ago · 8 km deep · 51 km away
25. 2.16km ENE of Kenwood, CAWed, Jan 5, 7:57 AM PST · 1733 days ago · 9 km deep · 63 km away
26. 2.05km W of Yountville, CAFri, Jan 7, 10:42 AM PST · 1730 days ago · 6 km deep · 56 km away
27. 1.711km NE of Milpitas, CASat, Jan 8, 9:54 AM PST · 1729 days ago · 4 km deep · 57 km away
28. 1.52km NE of Union City, CASat, Jan 8, 6:39 PM PST · 1729 days ago · 5 km deep · 42 km away
29. 1.75km WSW of Pacheco, CAMon, Jan 10, 3:05 PM PST · 1727 days ago · 9 km deep · 7 km away
30. 2.26km S of Anderson Springs, CATue, Jan 11, 4:43 AM PST · 1727 days ago · 4 km deep · 99 km away
31. 1.54km WSW of Colma, CAWed, Jan 12, 4:29 PM PST · 1725 days ago · 9 km deep · 53 km away
32. 1.61km NE of San Ramon, CAWed, Jan 12, 9:16 PM PST · 1725 days ago · 10 km deep · 23 km away
33. 2.111km SSW of Brentwood, CAThu, Jan 13, 1:57 PM PST · 1724 days ago · 18 km deep · 30 km away
34. 2.46km N of Diablo, CAThu, Jan 13, 5:21 PM PST · 1724 days ago · 13 km deep · 13 km away · felt by 25
35. 1.62km NNE of San Ramon, CASat, Jan 15, 9:15 AM PST · 1723 days ago · 11 km deep · 21 km away · felt by 2
36. 1.98km E of Fremont, CASat, Jan 15, 2:24 PM PST · 1722 days ago · 7 km deep · 52 km away · felt by 3
37. 1.712km NNE of Angwin, CAMon, Jan 17, 4:24 AM PST · 1721 days ago · 8 km deep · 83 km away
38. 1.65km N of Lafayette, CAFri, Jan 21, 11:21 AM PST · 1716 days ago · 6 km deep · 8 km away
39. 1.64km N of Lafayette, CAFri, Jan 21, 3:37 PM PST · 1716 days ago · 5 km deep · 10 km away · felt by 1
40. 2.25km WNW of Dublin, CAFri, Jan 21, 3:41 PM PST · 1716 days ago · 6 km deep · 29 km away · felt by 12
41. 1.96km WNW of Dublin, CAFri, Jan 21, 3:56 PM PST · 1716 days ago · 8 km deep · 29 km away · felt by 2
42. 1.61km NE of Byron, CASun, Jan 23, 8:55 AM PST · 1715 days ago · 4 km deep · 39 km away
43. 1.51km SE of Pacifica, CAMon, Jan 24, 7:24 AM PST · 1714 days ago · 8 km deep · 56 km away
44. 1.52km NNW of Green Valley, CAMon, Jan 24, 11:55 AM PST · 1713 days ago · 6 km deep · 33 km away
45. 1.612km SW of Mountain House, CATue, Jan 25, 6:19 AM PST · 1713 days ago · 18 km deep · 50 km away
46. 1.512km SW of Mountain House, CATue, Jan 25, 6:19 AM PST · 1713 days ago · 18 km deep · 50 km away
47. 1.93km WSW of American Canyon, CATue, Jan 25, 5:30 PM PST · 1712 days ago · 7 km deep · 29 km away
48. 1.610km NNE of Morgan Hill, CAThu, Jan 27, 2:42 AM PST · 1711 days ago · 3 km deep · 95 km away · felt by 1
49. 1.916km E of Seven Trees, CAThu, Jan 27, 5:04 PM PST · 1710 days ago · 4 km deep · 84 km away

Before

1. 1.66km WSW of Colma, CAWed, Dec 8, 7:01 AM PST · 1761 days ago · 9 km deep · 55 km away · felt by 2
2. 2.54km N of San Leandro, CASat, Dec 4, 6:08 PM PST · 1764 days ago · 3 km deep · 26 km away · felt by 150
3. 1.81km NE of San Ramon, CAFri, Dec 3, 11:25 PM PST · 1765 days ago · 9 km deep · 23 km away · felt by 1
4. 1.74km S of Portola Valley, CAThu, Dec 2, 7:22 PM PST · 1766 days ago · 6 km deep · 73 km away · felt by 1
5. 1.74km S of Portola Valley, CAThu, Dec 2, 6:32 PM PST · 1766 days ago · 6 km deep · 73 km away
6. 2.01km W of Kensington, CAMon, Nov 29, 7:37 PM PST · 1769 days ago · 5 km deep · 22 km away · felt by 43
7. 2.51km W of Kensington, CAMon, Nov 29, 7:30 PM PST · 1769 days ago · 5 km deep · 22 km away · felt by 965
8. 1.96km NNE of Windsor, CASat, Nov 27, 7:28 AM PST · 1772 days ago · 7 km deep · 94 km away
9. 1.67km ENE of Kenwood, CASat, Nov 27, 4:15 AM PST · 1772 days ago · 7 km deep · 62 km away
10. 1.910km ENE of Healdsburg, CAMon, Nov 22, 5:41 PM PST · 1776 days ago · 5 km deep · 98 km away
11. 1.97km ESE of Bethel Island, CASat, Nov 20, 8:33 PM PST · 1778 days ago · 9 km deep · 42 km away
12. 2.211km NW of Morgan Hill, CASat, Nov 20, 8:00 PM PST · 1778 days ago · 6 km deep · 91 km away · felt by 1
13. 1.98km SSW of Brentwood, CASat, Nov 20, 7:27 PM PST · 1778 days ago · 19 km deep · 28 km away · felt by 1
14. 1.75km E of Fremont, CASat, Nov 20, 8:43 AM PST · 1779 days ago · 9 km deep · 51 km away
15. 1.78km WSW of Mountain House, CAFri, Nov 19, 4:41 PM PST · 1779 days ago · 0 km deep · 45 km away
16. 2.44km S of Dillon Beach, CAFri, Nov 19, 2:22 PM PST · 1779 days ago · 10 km deep · 83 km away
17. 1.83km S of Dillon Beach, CAFri, Nov 19, 1:21 PM PST · 1779 days ago · 10 km deep · 83 km away
18. 1.91km NE of San Ramon, CAFri, Nov 19, 3:58 AM PST · 1780 days ago · 10 km deep · 23 km away
19. 1.71km NE of San Ramon, CAThu, Nov 18, 6:17 AM PST · 1781 days ago · 9 km deep · 23 km away
20. 1.81km NE of San Ramon, CAThu, Nov 18, 6:04 AM PST · 1781 days ago · 9 km deep · 23 km away · felt by 3

From the USGS Earthquake Hazards Program and its partner networks, event nc73661396. Read Sun, Oct 4, 2026, 4:47 AM UTC.