M1.6 earthquake 18km SW of Carpinteria, CA

Magnitude

1.6 (Mh), micro

Magnitude from

Southern California Seismic Network

Local time

Thu, Apr 28, 1977, 6:47 AM PDT

UTC

1977-04-28 13:47:13 UTC

Depth

6.0 km (3.7 mi), shallow

Epicenter

34.264° N, 119.636° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.9 km horizontally, 23.5 km in depth

Depth from

From location

Station coverage gap

135°

Stations used

8

• Summerland, CaliforniaPopulation 1,448. Forecast18 kmSSW
• Santa Barbara, CaliforniaPopulation 91,842. Forecast18 kmSSE
• Oxnard, CaliforniaPopulation 207,254. Forecast43 kmW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast130 kmW

After

1. 2.114km WNW of Malibu, CASat, Apr 30, 5:00 AM PDT · 18054 days ago · 13 km deep · 67 km away
2. 1.52km NW of Frazier Park, CASun, May 8, 3:35 AM PDT · 18046 days ago · 16 km deep · 89 km away
3. 1.62km ESE of Castaic, CAWed, May 11, 7:55 PM PDT · 18042 days ago · 6 km deep · 98 km away
4. 2.11km SSE of Castaic, CAWed, May 11, 8:23 PM PDT · 18042 days ago · 3 km deep · 97 km away
5. 1.513km NNE of Ojai, CAThu, May 12, 6:25 PM PDT · 18041 days ago · 4 km deep · 53 km away
6. 1.618km N of Pine Mountain Club, CAFri, May 13, 5:46 AM PDT · 18041 days ago · 6 km deep · 94 km away
7. 1.66km N of Frazier Park, CAWed, May 18, 1:27 PM PDT · 18036 days ago · 6 km deep · 93 km away
8. 2.014km N of Pine Mountain Club, CAFri, May 20, 6:23 AM PDT · 18034 days ago · 5 km deep · 91 km away
9. 1.513km W of Malibu, CASat, May 21, 12:07 PM PDT · 18033 days ago · 15 km deep · 69 km away
10. 1.610km N of Fillmore, CASun, May 22, 4:34 PM PDT · 18031 days ago · 6 km deep · 71 km away
11. 2.416km SSW of Neenach, CAMon, May 23, 8:56 PM PDT · 18030 days ago · 11 km deep · 98 km away
12. 2.33km SE of Oxnard, CAWed, May 25, 1:22 AM PDT · 18029 days ago · 12 km deep · 45 km away
13. 2.07km ENE of Ventura, CAFri, May 27, 1:33 AM PDT · 18027 days ago · 15 km deep · 44 km away
14. 1.720km NNE of Ojai, CASat, May 28, 8:10 PM PDT · 18025 days ago · 0 km deep · 60 km away
15. 2.711km NNE of Simi Valley, CATue, May 31, 11:55 AM PDT · 18023 days ago · 10 km deep · 87 km away
16. 1.56km S of Malibu, CAWed, Jun 1, 4:42 PM PDT · 18021 days ago · 9 km deep · 84 km away
17. 2.315km S of Port Hueneme, CAWed, Jun 8, 4:51 AM PDT · 18015 days ago · 2 km deep · 48 km away
18. 1.56km SSW of Frazier Park, CAFri, Jun 10, 5:16 AM PDT · 18013 days ago · 12 km deep · 84 km away
19. 3.29km SSW of Valencia, CASat, Jun 11, 7:18 AM PDT · 18012 days ago · 0 km deep · 94 km away
20. 2.69km SSW of Valencia, CASat, Jun 11, 7:53 AM PDT · 18012 days ago · 0 km deep · 95 km away
21. 1.75km SSW of Malibu Beach, CASat, Jun 11, 3:56 PM PDT · 18011 days ago · 8 km deep · 90 km away
22. 1.513km WNW of Castaic, CATue, Jun 14, 10:46 PM PDT · 18008 days ago · 22 km deep · 87 km away
23. 1.610km W of Malibu, CAThu, Jun 16, 6:13 AM PDT · 18007 days ago · 0 km deep · 73 km away
24. 1.511km NE of Pine Mountain Club, CASun, Jun 19, 1:46 PM PDT · 18004 days ago · 11 km deep · 90 km away
25. 1.611km ENE of Pine Mountain Club, CASun, Jun 19, 11:04 PM PDT · 18003 days ago · 17 km deep · 88 km away
26. 1.83km NNW of Frazier Park, CAWed, Jun 22, 2:32 AM PDT · 18001 days ago · 13 km deep · 90 km away
27. 1.716km SSW of Neenach, CAWed, Jun 22, 4:27 AM PDT · 18001 days ago · 13 km deep · 98 km away
28. 1.720km SE of Port Hueneme, CAWed, Jun 22, 10:58 AM PDT · 18001 days ago · 4 km deep · 61 km away
29. 2.14km NNW of Topanga, CAWed, Jun 22, 6:27 PM PDT · 18000 days ago · 12 km deep · 95 km away

Before

1. 1.99km W of Isla Vista, CATue, Apr 26, 10:17 AM PDT · 18058 days ago · 6 km deep · 34 km away
2. 1.82km WSW of Malibu, CASun, Apr 24, 1:40 AM PST · 18060 days ago · 10 km deep · 80 km away
3. 1.511km ESE of Piru, CASat, Apr 23, 10:30 PM PST · 18060 days ago · 18 km deep · 88 km away
4. 2.813km NNE of Simi Valley, CASat, Apr 23, 9:49 PM PST · 18060 days ago · 15 km deep · 90 km away
5. 2.54km S of Frazier Park, CAWed, Apr 20, 10:00 PM PST · 18063 days ago · 13 km deep · 86 km away
6. 1.76km SE of Simi Valley, CATue, Apr 19, 9:21 PM PST · 18064 days ago · 14 km deep · 87 km away
7. 2.227km WSW of Pine Mountain Club, CATue, Apr 19, 9:51 AM PST · 18065 days ago · 0 km deep · 57 km away
8. 2.29km SW of Malibu, CAMon, Apr 18, 11:33 PM PST · 18065 days ago · 6 km deep · 78 km away
9. 1.622km SSW of Frazier Park, CASat, Apr 9, 3:44 PM PST · 18074 days ago · 0 km deep · 70 km away
10. 1.812km ESE of Carpinteria, CAThu, Apr 7, 8:16 AM PST · 18077 days ago · 20 km deep · 25 km away
11. 1.56km SW of Santa Paula, CAWed, Apr 6, 8:11 AM PST · 18078 days ago · 0 km deep · 49 km away
12. 1.610km WSW of Grapevine, CAWed, Apr 6, 5:38 AM PST · 18078 days ago · 6 km deep · 92 km away

From the USGS Earthquake Hazards Program and its partner networks, event ci3333233. Read Sun, Oct 4, 2026, 9:00 AM UTC.