M2.1 earthquake 5km SSE of Walnut, CA

Magnitude

2.1 (Mh), micro

Magnitude from

Southern California Seismic Network

Local time

Sun, Sep 2, 1973, 4:36 AM PDT

UTC

1973-09-02 11:36:56 UTC

Depth

4.9 km (3.0 mi), shallow

Epicenter

33.979° N, 117.839° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 2.3 km horizontally, 4.0 km in depth

Magnitude uncertainty

±0.16

Depth from

From location

Station coverage gap

182°, poorly surrounded by stations

Stations used

4

• Walnut, CaliforniaPopulation 30,237. Forecast5 kmSSE
• Pomona, CaliforniaPopulation 153,266. Forecast12 kmSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast38 kmESE

After

1. 1.78km ENE of Santa Clarita, CASun, Sep 2, 6:24 AM PDT · 19389 days ago · 14 km deep · 74 km away
2. 1.71km E of Placentia, CASun, Sep 2, 7:40 AM PDT · 19389 days ago · 5 km deep · 12 km away
3. 2.610km NNE of Banning, CASun, Sep 2, 11:10 PM PDT · 19388 days ago · 6 km deep · 92 km away
4. 1.70km SSW of Granada Hills, CAWed, Sep 5, 2:33 AM PDT · 19386 days ago · 4 km deep · 69 km away
5. 1.72km NNE of Colton, CAThu, Sep 6, 9:34 AM PDT · 19385 days ago · 6 km deep · 51 km away
6. 2.67km ENE of Santa Clarita, CAFri, Sep 7, 8:18 AM PDT · 19384 days ago · 10 km deep · 75 km away
7. 1.79km SW of Agua Dulce, CAFri, Sep 7, 12:37 PM PDT · 19384 days ago · 14 km deep · 73 km away
8. 1.718km NNE of Altadena, CASat, Sep 8, 12:33 AM PDT · 19383 days ago · 9 km deep · 45 km away
9. 1.79km N of Lake View Terrace, CASat, Sep 8, 12:50 AM PDT · 19383 days ago · 5 km deep · 65 km away
10. 1.76km SE of Loma Linda, CASat, Sep 8, 8:47 AM PDT · 19383 days ago · 8 km deep · 57 km away
11. 1.79km N of Lake View Terrace, CASat, Sep 8, 7:50 PM PDT · 19383 days ago · 5 km deep · 65 km away
12. 1.77km E of Santa Clarita, CASun, Sep 9, 12:42 AM PDT · 19382 days ago · 11 km deep · 74 km away
13. 1.78km SE of Santa Clarita, CASun, Sep 9, 12:52 AM PDT · 19382 days ago · 8 km deep · 70 km away
14. 1.712km N of Lake View Terrace, CAMon, Sep 10, 1:01 AM PDT · 19381 days ago · 8 km deep · 64 km away
15. 2.04km SSE of Santa Clarita, CAMon, Sep 10, 4:22 AM PDT · 19381 days ago · 0 km deep · 75 km away
16. 1.74km SW of Chino Hills, CAMon, Sep 10, 4:34 AM PDT · 19381 days ago · 10 km deep · 5 km away
17. 1.78km ESE of Santa Clarita, CAMon, Sep 10, 6:38 AM PDT · 19381 days ago · 10 km deep · 70 km away
18. 2.04km ESE of Santa Clarita, CATue, Sep 11, 2:09 AM PDT · 19380 days ago · 5 km deep · 75 km away
19. 1.70km SSW of Loma Linda, CATue, Sep 11, 7:00 PM PDT · 19380 days ago · 8 km deep · 54 km away
20. 1.73km ENE of Lake View Terrace, CAWed, Sep 12, 6:46 AM PDT · 19379 days ago · 7 km deep · 57 km away
21. 2.50km SSE of Lake View Terrace, CAWed, Sep 12, 7:52 AM PDT · 19379 days ago · 0 km deep · 58 km away
22. 3.28km SSW of Agua Dulce, CAThu, Sep 13, 2:06 PM PDT · 19378 days ago · 5 km deep · 70 km away
23. 1.78km WSW of Agua Dulce, CAFri, Sep 14, 10:05 AM PDT · 19377 days ago · 11 km deep · 75 km away
24. 1.78km NNW of Lake View Terrace, CAFri, Sep 14, 4:03 PM PDT · 19377 days ago · 3 km deep · 65 km away
25. 2.52km WSW of Loma Linda, CAFri, Sep 14, 7:15 PM PDT · 19377 days ago · 13 km deep · 52 km away
26. 1.711km ESE of Santa Clarita, CAFri, Sep 14, 11:41 PM PDT · 19376 days ago · 8 km deep · 68 km away
27. 1.77km NNE of Lake View Terrace, CASat, Sep 15, 3:37 AM PDT · 19376 days ago · 6 km deep · 60 km away
28. 1.76km NW of Granada Hills, CASat, Sep 15, 9:56 AM PDT · 19376 days ago · 10 km deep · 75 km away
29. 1.72km ENE of Granada Hills, CASat, Sep 15, 9:57 AM PDT · 19376 days ago · 5 km deep · 68 km away
30. 1.76km NW of Granada Hills, CASat, Sep 15, 4:03 PM PDT · 19376 days ago · 7 km deep · 74 km away
31. 2.38km NNE of Chatsworth, CASat, Sep 15, 4:04 PM PDT · 19376 days ago · 7 km deep · 77 km away
32. 1.712km N of Lake View Terrace, CASat, Sep 15, 4:28 PM PDT · 19376 days ago · 7 km deep · 66 km away
33. 1.73km NNE of Granada Hills, CASun, Sep 16, 7:22 AM PDT · 19375 days ago · 9 km deep · 70 km away
34. 1.72km SE of Rossmoor, CASun, Sep 16, 8:01 AM PDT · 19375 days ago · 5 km deep · 31 km away
35. 2.02km ESE of Lakewood, CASun, Sep 16, 6:25 PM PDT · 19375 days ago · 3 km deep · 29 km away
36. 2.111km E of Santa Clarita, CAMon, Sep 17, 2:38 AM PDT · 19374 days ago · 5 km deep · 69 km away
37. 2.07km NE of Lake View Terrace, CAMon, Sep 17, 6:44 AM PDT · 19374 days ago · 3 km deep · 58 km away
38. 1.74km NW of Granada Hills, CAMon, Sep 17, 8:53 AM PDT · 19374 days ago · 15 km deep · 73 km away
39. 1.73km S of Chino Hills, CAMon, Sep 17, 7:37 PM PDT · 19374 days ago · 6 km deep · 7 km away
40. 1.710km NNE of Pacoima, CATue, Sep 18, 12:06 AM PDT · 19373 days ago · 6 km deep · 68 km away
41. 1.74km NNE of Villa Park, CATue, Sep 18, 12:24 AM PDT · 19373 days ago · 7 km deep · 15 km away
42. 1.72km WNW of Loma Linda, CATue, Sep 18, 10:15 PM PDT · 19372 days ago · 7 km deep · 52 km away
43. 2.13km ENE of Valencia, CAThu, Sep 20, 4:31 AM PDT · 19371 days ago · 18 km deep · 85 km away
44. 1.75km SW of Valencia, CAThu, Sep 20, 4:32 AM PDT · 19371 days ago · 2 km deep · 87 km away
45. 1.77km NNE of Pacoima, CAThu, Sep 20, 8:08 AM PDT · 19371 days ago · 7 km deep · 67 km away
46. 1.79km NNE of Chatsworth, CAFri, Sep 21, 5:48 AM PDT · 19370 days ago · 8 km deep · 79 km away
47. 1.712km NE of Trabuco Canyon, CAFri, Sep 21, 8:00 PM PDT · 19370 days ago · 6 km deep · 41 km away
48. 1.78km E of Santa Clarita, CAFri, Sep 21, 8:53 PM PDT · 19369 days ago · 11 km deep · 72 km away
49. 1.72km SSW of Valencia, CASat, Sep 22, 9:28 AM PDT · 19369 days ago · 5 km deep · 85 km away
50. 1.79km WSW of Agua Dulce, CASat, Sep 22, 8:58 PM PDT · 19368 days ago · 16 km deep · 75 km away
51. 1.75km N of Moreno Valley, CASun, Sep 23, 6:29 PM PDT · 19368 days ago · 4 km deep · 56 km away
52. 1.78km E of Yorba Linda, CATue, Sep 25, 5:33 AM PDT · 19366 days ago · 5 km deep · 14 km away
53. 3.38km NNE of Pacoima, CATue, Sep 25, 5:59 AM PDT · 19366 days ago · 8 km deep · 68 km away
54. 2.26km N of Pacoima, CATue, Sep 25, 6:02 AM PDT · 19366 days ago · 5 km deep · 67 km away
55. 1.77km NNE of Pacoima, CATue, Sep 25, 7:24 AM PDT · 19366 days ago · 5 km deep · 67 km away
56. 2.17km E of San Pedro, CATue, Sep 25, 8:02 AM PDT · 19366 days ago · 8 km deep · 44 km away
57. 1.74km SE of San Pedro, CATue, Sep 25, 8:03 AM PDT · 19366 days ago · 4 km deep · 49 km away
58. 1.78km NNE of Pacoima, CATue, Sep 25, 11:54 AM PDT · 19366 days ago · 8 km deep · 66 km away
59. 1.74km SE of Santa Clarita, CATue, Sep 25, 8:59 PM PDT · 19365 days ago · 5 km deep · 74 km away
60. 2.412km N of Lake View Terrace, CAWed, Sep 26, 4:19 AM PDT · 19365 days ago · 4 km deep · 66 km away

The first 60 of 124.

Before

1. 2.33km SE of Tarzana, CASat, Sep 1, 11:28 PM PDT · 19389 days ago · 6 km deep · 67 km away
2. 1.712km S of Agua Dulce, CASat, Sep 1, 2:18 PM PDT · 19390 days ago · 4 km deep · 66 km away
3. 1.73km NW of Silver Lake, CASat, Sep 1, 12:00 PM PDT · 19390 days ago · 3 km deep · 44 km away
4. 1.710km ESE of Santa Clarita, CASat, Sep 1, 8:46 AM PDT · 19390 days ago · 11 km deep · 69 km away
5. 1.79km N of Lake View Terrace, CASat, Sep 1, 8:20 AM PDT · 19390 days ago · 4 km deep · 64 km away
6. 1.72km ESE of Pico Rivera, CASat, Sep 1, 6:31 AM PDT · 19390 days ago · 10 km deep · 22 km away
7. 1.78km E of Santa Clarita, CAThu, Aug 30, 5:52 PM PDT · 19392 days ago · 10 km deep · 72 km away
8. 1.76km ESE of Santa Clarita, CAThu, Aug 30, 2:40 PM PDT · 19392 days ago · 10 km deep · 72 km away
9. 1.76km NW of Rialto, CAThu, Aug 30, 12:00 PM PDT · 19392 days ago · 6 km deep · 44 km away
10. 1.73km NE of Claremont, CAThu, Aug 30, 5:05 AM PDT · 19392 days ago · 6 km deep · 20 km away
11. 2.34km NNW of Chino, CAThu, Aug 30, 5:05 AM PDT · 19392 days ago · 0 km deep · 14 km away
12. 1.74km W of Manhattan Beach, CAThu, Aug 30, 4:52 AM PDT · 19392 days ago · 6 km deep · 58 km away
13. 2.42km WSW of Manhattan Beach, CAThu, Aug 30, 4:51 AM PDT · 19392 days ago · 6 km deep · 55 km away
14. 1.77km ESE of Santa Clarita, CAMon, Aug 27, 2:26 PM PDT · 19395 days ago · 9 km deep · 71 km away
15. 1.75km NW of Rialto, CASat, Aug 25, 10:57 PM PDT · 19396 days ago · 6 km deep · 43 km away
16. 1.72km NE of Running Springs, CASat, Aug 25, 10:53 PM PDT · 19396 days ago · 6 km deep · 74 km away
17. 1.77km E of Santa Clarita, CASat, Aug 25, 11:08 AM PDT · 19397 days ago · 11 km deep · 73 km away
18. 1.710km E of Santa Clarita, CASat, Aug 25, 2:23 AM PDT · 19397 days ago · 12 km deep · 72 km away
19. 1.74km NNE of Fontana, CAThu, Aug 23, 6:41 PM PDT · 19399 days ago · 7 km deep · 40 km away
20. 2.411km SSW of Agua Dulce, CAThu, Aug 23, 3:48 PM PDT · 19399 days ago · 11 km deep · 69 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3319289. Read Sat, Oct 3, 2026, 2:34 PM UTC.