M3.9 earthquake 51 km NW of Copiapó, Chile

Magnitude

3.9 (mb), minor

Local time

Sat, Aug 25, 1973, 6:11 AM GMT-4

UTC

1973-08-25 10:11:05 UTC

Depth

33.0 km (20.5 mi), shallow

Epicenter

26.989° S, 70.636° W

Region

Chile

Tsunami flag

No

Status

Reviewed by a seismologist

Depth from

OPERATOR_ASSIGNED

Stations used

5

• Caldera, ChilePopulation 16,150. Forecast20 kmENE
• Copiapó, ChilePopulation 129,280. Forecast52 kmNW
• Santiago, ChilePopulation 4,837,295. Forecast719 kmN

After

1. 5.083 km NW of Copiapó, ChileTue, Sep 18, 10:07 AM GMT-4 · 19368 days ago · 33 km deep · 35 km away
2. 5.273 km WNW of Copiapó, ChileSun, Sep 23, 5:38 PM GMT-4 · 19363 days ago · 33 km deep · 36 km away
3. 4.995 km NW of Copiapó, ChileFri, Oct 5, 4:23 AM GMT-3 · 19351 days ago · 33 km deep · 49 km away
4. 4.779 km NW of Copiapó, ChileFri, Oct 5, 12:54 PM GMT-3 · 19351 days ago · 33 km deep · 31 km away
5. 4.678 km NW of Copiapó, ChileThu, Oct 18, 2:46 PM GMT-3 · 19338 days ago · 33 km deep · 32 km away

Before

1. 4.883 km WSW of Diego de Almagro, ChileMon, Aug 13, 11:17 PM GMT-4 · 19403 days ago · 28 km deep · 52 km away
2. 4.961 km WSW of Diego de Almagro, ChileMon, Aug 13, 10:19 PM GMT-4 · 19403 days ago · 25 km deep · 37 km away
3. 5.782 km WSW of Diego de Almagro, ChileMon, Aug 13, 9:57 PM GMT-4 · 19403 days ago · 29 km deep · 44 km away
4. 4.591 km WSW of Diego de Almagro, ChileWed, Aug 8, 8:14 AM GMT-4 · 19409 days ago · 17 km deep · 40 km away
5. 4.387 km W of Diego de Almagro, ChileTue, Aug 7, 11:38 PM GMT-4 · 19409 days ago · 33 km deep · 74 km away
6. 6.383 km NW of Copiapó, ChileTue, Aug 7, 10:22 AM GMT-4 · 19410 days ago · 14 km deep · 33 km away
7. 4.998 km WSW of Diego de Almagro, ChileTue, Aug 7, 10:01 AM GMT-4 · 19410 days ago · 19 km deep · 49 km away
8. 4.384 km NW of Copiapó, ChileTue, Aug 7, 7:15 AM GMT-4 · 19410 days ago · 36 km deep · 33 km away
9. 5.184 km NW of Copiapó, ChileTue, Aug 7, 6:23 AM GMT-4 · 19410 days ago · 13 km deep · 34 km away
10. 5.989 km NW of Copiapó, ChileTue, Aug 7, 6:04 AM GMT-4 · 19410 days ago · 34 km deep · 38 km away
11. 4.080 km NW of Copiapó, ChileTue, Aug 7, 3:13 AM GMT-4 · 19410 days ago · 38 km deep · 30 km away
12. 4.691 km NW of Copiapó, ChileTue, Aug 7, 12:59 AM GMT-4 · 19410 days ago · 34 km deep · 43 km away
13. 6.184 km NW of Copiapó, ChileMon, Aug 6, 11:41 PM GMT-4 · 19410 days ago · 25 km deep · 33 km away
14. 4.695 km NW of Copiapó, ChileMon, Aug 6, 9:06 AM GMT-4 · 19411 days ago · 33 km deep · 48 km away
15. 4.599 km NW of Copiapó, ChileMon, Aug 6, 3:29 AM GMT-4 · 19411 days ago · 19 km deep · 51 km away
16. 4.185 km WNW of Copiapó, ChileThu, Aug 2, 8:55 AM GMT-4 · 19415 days ago · 33 km deep · 44 km away
17. 5.789 km NW of Copiapó, ChileWed, Aug 1, 11:44 AM GMT-4 · 19416 days ago · 16 km deep · 40 km away
18. 4.788 km NW of Copiapó, ChileWed, Aug 1, 8:30 AM GMT-4 · 19416 days ago · 33 km deep · 43 km away
19. 5.288 km WNW of Copiapó, ChileWed, Aug 1, 7:13 AM GMT-4 · 19416 days ago · 33 km deep · 56 km away
20. 5.275 km WNW of Copiapó, ChileWed, Aug 1, 7:08 AM GMT-4 · 19416 days ago · 33 km deep · 45 km away

From the USGS Earthquake Hazards Program and its partner networks, event usp000036z. Read Mon, Sep 28, 2026, 10:20 AM UTC.