M2.7 earthquake 4 km SE of Palermo, California

Magnitude

2.7 (md), micro

Local time

Sat, Aug 26, 1978, 2:41 PM PDT

UTC

1978-08-26 21:41:14 UTC

Depth

5.7 km (3.6 mi), shallow

Epicenter

39.408° N, 121.496° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.3 km horizontally, 0.6 km in depth

Magnitude uncertainty

±0.10

Depth from

From location

Station coverage gap

92°

Stations used

21

• Palermo, CaliforniaPopulation 5,382. Forecast5 kmSE
• Oroville, CaliforniaPopulation 16,260. Forecast13 kmSSE
• Chico, CaliforniaPopulation 121,345. Forecast46 kmSE
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast662 kmNNW

After

1. 3.20 km WSW of Monument Hills, CaliforniaSun, Aug 27, 9:42 PM PDT · 17558 days ago · 8 km deep · 89 km away
2. 2.22 km SSE of Monument Hills, CaliforniaTue, Aug 29, 1:24 PM PDT · 17556 days ago · 9 km deep · 91 km away
3. 1.65 km WNW of Bangor, CaliforniaWed, Aug 30, 1:08 PM PDT · 17555 days ago · 5 km deep · 3 km away
4. 2.24 km SE of Cottonwood, CaliforniaTue, Sep 5, 2:12 PM PDT · 17549 days ago · 11 km deep · 94 km away
5. 2.21 km SW of Monument Hills, CaliforniaTue, Sep 5, 4:06 PM PDT · 17549 days ago · 10 km deep · 91 km away
6. 1.94 km SSW of Monument Hills, CaliforniaWed, Sep 6, 2:01 AM PDT · 17549 days ago · 16 km deep · 94 km away
7. 1.92 km S of Monument Hills, CaliforniaWed, Sep 6, 7:45 PM PDT · 17548 days ago · 10 km deep · 91 km away
8. 1.73 km W of Granite Bay, CaliforniaThu, Sep 7, 8:58 PM PDT · 17547 days ago · 11 km deep · 77 km away
9. 4.24 km SSW of Monument Hills, CaliforniaFri, Sep 8, 9:59 AM PDT · 17546 days ago · 10 km deep · 93 km away
10. 2.02 km S of Monument Hills, CaliforniaFri, Sep 8, 10:08 AM PDT · 17546 days ago · 9 km deep · 91 km away
11. 3.32 km SW of Monument Hills, CaliforniaFri, Sep 8, 7:00 PM PDT · 17546 days ago · 12 km deep · 92 km away
12. 2.33 km SSE of Cottonwood, CaliforniaSat, Sep 9, 11:35 PM PDT · 17545 days ago · 11 km deep · 95 km away
13. 2.13 km WNW of Monument Hills, CaliforniaMon, Sep 11, 10:39 PM PDT · 17543 days ago · 1 km deep · 89 km away
14. 2.64 km NE of Cromberg, CaliforniaFri, Sep 22, 11:10 AM PDT · 17532 days ago · 11 km deep · 90 km away
15. 2.116 km ENE of Lower Lake, CaliforniaMon, Sep 25, 4:17 AM PDT · 17529 days ago · 3 km deep · 94 km away
16. 1.61 km SSW of Monument Hills, CaliforniaThu, Sep 28, 6:16 PM PDT · 17526 days ago · 9 km deep · 91 km away

Before

1. 1.81 km E of Oroville East, CaliforniaFri, Aug 25, 11:14 AM PDT · 17560 days ago · 11 km deep · 12 km away
2. 1.87 km SW of Whitehawk, CaliforniaFri, Aug 25, 10:58 AM PDT · 17560 days ago · 18 km deep · 82 km away
3. 1.62 km NNE of Little Grass Valley, CaliforniaThu, Aug 24, 5:02 PM PDT · 17561 days ago · 9 km deep · 59 km away
4. 2.35 km SE of Bucks Lake, CaliforniaWed, Aug 23, 1:44 PM PDT · 17562 days ago · 1 km deep · 56 km away
5. 2.04 km S of Oroville East, CaliforniaTue, Aug 22, 12:45 PM PDT · 17563 days ago · 2 km deep · 7 km away
6. 1.54 km WSW of Granite Bay, CaliforniaSun, Aug 20, 10:52 AM PDT · 17565 days ago · 11 km deep · 78 km away
7. 1.810 km W of La Porte, CaliforniaWed, Aug 16, 3:42 AM PDT · 17569 days ago · 8 km deep · 44 km away
8. 2.111 km NNE of Clipper Mills, CaliforniaWed, Aug 16, 3:27 AM PDT · 17569 days ago · 15 km deep · 41 km away
9. 2.56 km ESE of Bucks Lake, CaliforniaTue, Aug 15, 10:52 AM PDT · 17570 days ago · 0 km deep · 58 km away
10. 2.21 km ESE of South Oroville, CaliforniaMon, Aug 14, 8:59 AM PDT · 17571 days ago · 3 km deep · 10 km away
11. 1.710 km ENE of Clearlake Oaks, CaliforniaThu, Aug 3, 10:15 PM PDT · 17582 days ago · -1 km deep · 99 km away
12. 1.74 km ESE of Palermo, CaliforniaTue, Aug 1, 8:00 AM PDT · 17584 days ago · 5 km deep · 1 km away
13. 1.93 km SE of Willows, CaliforniaSat, Jul 29, 1:33 AM PDT · 17588 days ago · 20 km deep · 58 km away
14. 1.76 km WSW of Plumas Eureka (historical), CaliforniaFri, Jul 28, 1:34 AM PDT · 17589 days ago · -1 km deep · 72 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc1041890. Read Tue, Sep 22, 2026, 8:51 PM UTC.