M2.7 earthquake 25km WSW of Encinitas, CA

Magnitude

2.7 (ML, local (Richter)), micro

Magnitude from

Southern California Seismic Network

Local time

Sat, May 20, 1978, 10:23 PM PDT

UTC

1978-05-21 05:23:12 UTC

Depth

8.1 km (5.1 mi), shallow

Epicenter

32.952° N, 117.538° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 1.6 km in depth

Magnitude uncertainty

±0.20

Depth from

From location

Station coverage gap

193°, poorly surrounded by stations

Stations used

23

• Encinitas, CaliforniaPopulation 62,930. Forecast25 kmWSW
• Carlsbad, CaliforniaPopulation 114,746. Forecast29 kmSW
• San Diego, CaliforniaPopulation 1,404,452. Forecast44 kmNW

After

1. 1.810km NNE of Julian, CASun, May 21, 10:13 PM PDT · 17665 days ago · 16 km deep · 94 km away
2. 1.611km SSE of Warner Springs, CASun, May 21, 11:31 PM PDT · 17665 days ago · 6 km deep · 93 km away
3. 1.816km NNW of Aguanga, CATue, May 23, 11:24 AM PDT · 17663 days ago · 8 km deep · 91 km away
4. 1.913km E of Aguanga, CAWed, May 24, 12:03 PM PDT · 17662 days ago · 17 km deep · 92 km away
5. 1.96km SSW of Warner Springs, CAWed, May 24, 7:57 PM PDT · 17662 days ago · 9 km deep · 87 km away
6. 1.610km NE of Aguanga, CAThu, May 25, 5:40 PM PDT · 17661 days ago · 9 km deep · 93 km away
7. 1.610km NE of Aguanga, CAThu, May 25, 5:40 PM PDT · 17661 days ago · 9 km deep · 93 km away
8. 1.810km NE of Aguanga, CAFri, May 26, 2:08 AM PDT · 17661 days ago · 6 km deep · 93 km away
9. 2.15km NNW of San Joaquin Hills, CAWed, May 31, 9:48 AM PDT · 17655 days ago · 0 km deep · 83 km away
10. 4.414km NNW of Warner Springs, CAMon, Jun 5, 9:03 AM PDT · 17650 days ago · 17 km deep · 95 km away
11. 1.914km S of Anza, CAMon, Jun 5, 9:08 AM PDT · 17650 days ago · 17 km deep · 95 km away
12. 1.914km S of Anza, CAMon, Jun 5, 9:22 AM PDT · 17650 days ago · 14 km deep · 95 km away
13. 1.914km S of Anza, CAMon, Jun 5, 9:23 AM PDT · 17650 days ago · 8 km deep · 95 km away
14. 1.814km S of Anza, CAMon, Jun 5, 10:13 AM PDT · 17650 days ago · 12 km deep · 95 km away
15. 1.913km S of Anza, CAMon, Jun 5, 10:42 AM PDT · 17650 days ago · 14 km deep · 95 km away
16. 2.915km S of Anza, CAMon, Jun 5, 7:00 PM PDT · 17650 days ago · 12 km deep · 94 km away
17. 2.023km NNE of Avalon, CAMon, Jun 5, 10:19 PM PDT · 17650 days ago · 6 km deep · 90 km away
18. 1.815km S of Anza, CATue, Jun 6, 12:09 PM PDT · 17649 days ago · 13 km deep · 94 km away
19. 1.814km S of Anza, CATue, Jun 6, 6:58 PM PDT · 17649 days ago · 12 km deep · 95 km away
20. 1.94km SSE of Lake Henshaw, CASun, Jun 11, 1:02 AM PDT · 17645 days ago · 6 km deep · 79 km away
21. 1.79km ENE of Aguanga, CASun, Jun 11, 5:49 AM PDT · 17645 days ago · 6 km deep · 92 km away
22. 1.68km WSW of Anza, CASun, Jun 11, 11:55 AM PDT · 17644 days ago · 8 km deep · 97 km away
23. 2.76km SSE of Palomar Observatory, CASun, Jun 11, 1:14 PM PDT · 17644 days ago · 9 km deep · 76 km away
24. 2.08km WSW of Anza, CAMon, Jun 12, 10:32 AM PDT · 17643 days ago · 6 km deep · 97 km away
25. 1.67km WSW of Anza, CAMon, Jun 12, 3:42 PM PDT · 17643 days ago · 6 km deep · 98 km away
26. 3.010km NE of Aguanga, CAWed, Jun 14, 12:44 PM PDT · 17641 days ago · 12 km deep · 93 km away
27. 1.915km S of Anza, CAFri, Jun 16, 6:44 PM PDT · 17639 days ago · 12 km deep · 94 km away
28. 2.24km NNW of Lake Henshaw, CAWed, Jun 21, 8:53 PM PDT · 17634 days ago · 12 km deep · 79 km away
29. 1.74km W of Lake Henshaw, CASat, Jun 24, 11:23 AM PDT · 17631 days ago · 6 km deep · 76 km away
30. 1.512km NW of Warner Springs, CASun, Jun 25, 7:39 AM PDT · 17630 days ago · 8 km deep · 89 km away
31. 2.217km SSW of La Jolla, CAWed, Jun 28, 11:55 PM PDT · 17627 days ago · 8 km deep · 30 km away
32. 1.514km N of Warner Springs, CASat, Jul 1, 2:21 AM PDT · 17625 days ago · 12 km deep · 99 km away
33. 2.53km S of Nuevo, CASat, Jul 1, 11:13 PM PDT · 17624 days ago · 13 km deep · 98 km away
34. 1.72km WNW of Julian, CAFri, Jul 7, 7:10 AM PDT · 17618 days ago · 14 km deep · 86 km away
35. 2.715km E of Aguanga, CAWed, Jul 12, 7:10 AM PDT · 17613 days ago · 12 km deep · 93 km away
36. 2.015km S of Anza, CASat, Jul 15, 5:02 PM PDT · 17610 days ago · 13 km deep · 94 km away
37. 1.79km WSW of Anza, CASun, Jul 16, 12:55 AM PDT · 17610 days ago · 5 km deep · 96 km away
38. 1.912km NNE of Trabuco Canyon, CASun, Jul 16, 3:24 PM PDT · 17609 days ago · 4 km deep · 89 km away
39. 1.79km WSW of Anza, CAMon, Jul 17, 8:13 AM PDT · 17608 days ago · 6 km deep · 96 km away
40. 2.42km S of National City, CAMon, Jul 17, 10:25 AM PDT · 17608 days ago · 11 km deep · 52 km away
41. 2.034km WSW of Encinitas, CATue, Jul 18, 10:11 PM PDT · 17607 days ago · 6 km deep · 10 km away
42. 2.872km WSW of Imperial Beach, CAWed, Jul 19, 3:49 PM PDT · 17606 days ago · 0 km deep · 77 km away

Before

1. 1.88km WSW of Anza, CAThu, May 18, 10:57 AM PDT · 17668 days ago · 8 km deep · 97 km away
2. 1.75km WSW of Pine Valley, CATue, May 16, 4:18 PM PDT · 17670 days ago · 6 km deep · 92 km away
3. 1.78km NW of Warner Springs, CATue, May 16, 2:14 AM PDT · 17671 days ago · 11 km deep · 90 km away
4. 1.67km SSW of Anza, CAMon, May 15, 2:35 PM PDT · 17671 days ago · 12 km deep · 99 km away
5. 1.76km SSW of Anza, CAMon, May 15, 2:14 PM PDT · 17671 days ago · 13 km deep · 100 km away
6. 1.75km SW of Palomar Observatory, CAMon, May 15, 2:07 AM PDT · 17672 days ago · 19 km deep · 73 km away
7. 1.63km NNW of Palomar Observatory, CATue, May 9, 7:38 PM PDT · 17677 days ago · 5 km deep · 78 km away
8. 1.62km NW of Palomar Observatory, CATue, May 9, 11:07 AM PDT · 17677 days ago · 5 km deep · 77 km away
9. 2.221km NNE of Avalon, CAMon, May 1, 4:59 AM PDT · 17686 days ago · 6 km deep · 94 km away
10. 1.68km WSW of Anza, CASun, Apr 30, 5:55 AM PDT · 17687 days ago · 6 km deep · 97 km away
11. 1.68km WSW of Anza, CAFri, Apr 28, 9:48 PM PST · 17688 days ago · 9 km deep · 97 km away
12. 1.821km WSW of Newport Beach, CAFri, Apr 28, 3:11 AM PST · 17689 days ago · 6 km deep · 84 km away
13. 2.19km WSW of Anza, CAWed, Apr 26, 6:40 AM PST · 17690 days ago · 6 km deep · 96 km away
14. 1.89km ENE of Aguanga, CAMon, Apr 24, 6:24 AM PST · 17692 days ago · 9 km deep · 92 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3339564. Read Fri, Oct 2, 2026, 1:24 AM UTC.