M1.6 earthquake 4 km NNE of Ridgely, Tennessee

Magnitude

1.6 (Md, duration), micro

Magnitude from

NM

Local time

Mon, Aug 20, 2012, 9:37 PM CDT

UTC

2012-08-21 02:37:44 UTC

Depth

5.6 km (3.5 mi), shallow

Epicenter

36.304° N, 89.472° W

Region

Tennessee

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.6 km horizontally, 0.9 km in depth

Magnitude uncertainty

±0.10

Depth from

From location

Station coverage gap

66°

Stations used

20

• Ridgely, TennesseePopulation 1,706. Forecast5 kmNNE
• Dyersburg, TennesseePopulation 16,781. Forecast31 kmNNW
• Memphis, TennesseePopulation 633,104. Forecast138 kmNNE
• Chicago, IllinoisPopulation 2,664,452. Forecast636 kmSSW

After

1. 1.81 km SE of Caruthersville, MissouriTue, Aug 21, 11:08 PM CDT · 5153 days ago · 8 km deep · 20 km away
2. 1.76 km SE of Marston, MissouriWed, Aug 22, 9:24 PM CDT · 5152 days ago · 9 km deep · 21 km away
3. 2.26 km NNW of Burdette, ArkansasThu, Aug 23, 11:58 PM CDT · 5151 days ago · 5 km deep · 66 km away
4. 1.58 km WNW of Tiptonville, TennesseeMon, Aug 27, 5:27 AM CDT · 5148 days ago · 15 km deep · 15 km away
5. 2.66 km ESE of Marston, MissouriMon, Sep 3, 7:12 AM CDT · 5141 days ago · 8 km deep · 22 km away · felt by 13
6. 1.68 km NW of Tiptonville, TennesseeTue, Sep 4, 4:48 AM CDT · 5140 days ago · 6 km deep · 16 km away
7. 2.47 km ESE of Marston, MissouriFri, Sep 7, 1:37 PM CDT · 5137 days ago · 8 km deep · 22 km away
8. 2.38 km N of New Madrid, MissouriSun, Sep 9, 7:12 PM CDT · 5135 days ago · 5 km deep · 40 km away
9. 2.14 km W of Risco, MissouriMon, Sep 10, 9:17 AM CDT · 5134 days ago · 5 km deep · 44 km away
10. 1.94 km WSW of Tiptonville, TennesseeTue, Sep 11, 9:44 AM CDT · 5133 days ago · 9 km deep · 9 km away
11. 1.60 km E of Ridgely, TennesseeThu, Sep 13, 3:40 AM CDT · 5131 days ago · 8 km deep · 5 km away
12. 2.02 km ESE of Marston, MissouriSat, Sep 15, 2:50 AM CDT · 5129 days ago · 11 km deep · 26 km away
13. 2.32 km N of Marston, MissouriWed, Sep 19, 4:40 AM CDT · 5125 days ago · 9 km deep · 29 km away
14. 1.55 km SW of Tiptonville, TennesseeSat, Sep 22, 7:49 PM CDT · 5121 days ago · 9 km deep · 6 km away
15. 2.22 km NNE of Cooter, MissouriFri, Sep 28, 1:40 AM CDT · 5116 days ago · 9 km deep · 39 km away
16. 1.54 km W of Marston, MissouriMon, Oct 1, 4:29 AM CDT · 5113 days ago · 12 km deep · 30 km away
17. 1.74 km SSE of Marston, MissouriSat, Oct 6, 8:04 PM CDT · 5107 days ago · 12 km deep · 23 km away
18. 1.63 km ENE of Marston, MissouriMon, Oct 8, 1:23 AM CDT · 5106 days ago · 6 km deep · 27 km away
19. 1.66 km W of Tiptonville, TennesseeMon, Oct 8, 4:18 PM CDT · 5106 days ago · 9 km deep · 10 km away
20. 1.53 km SE of Ridgely, TennesseeSat, Oct 13, 8:29 AM CDT · 5101 days ago · 6 km deep · 7 km away

Before

1. 2.17 km NNW of Tiptonville, TennesseeSat, Aug 11, 8:58 PM CDT · 5163 days ago · 6 km deep · 16 km away
2. 2.24 km ENE of Marston, MissouriSat, Aug 11, 4:01 AM CDT · 5164 days ago · 7 km deep · 27 km away
3. 2.00 km WNW of Cooter, MissouriFri, Aug 10, 10:45 PM CDT · 5164 days ago · 8 km deep · 42 km away
4. 1.87 km SSE of Matthews, MissouriFri, Aug 10, 3:17 AM CDT · 5165 days ago · 8 km deep · 45 km away
5. 1.97 km SSW of Holland, MissouriMon, Aug 6, 4:55 AM CDT · 5169 days ago · 9 km deep · 51 km away
6. 1.59 km NW of Tiptonville, TennesseeTue, Jul 31, 6:20 PM CDT · 5175 days ago · 9 km deep · 16 km away
7. 1.65 km S of New Madrid, MissouriSat, Jul 28, 1:28 PM CDT · 5178 days ago · 7 km deep · 26 km away
8. 1.97 km ESE of New Madrid, MissouriWed, Jul 25, 10:07 PM CDT · 5180 days ago · 10 km deep · 29 km away
9. 1.54 km WNW of Marston, MissouriTue, Jul 24, 5:16 AM CDT · 5182 days ago · 7 km deep · 31 km away
10. 1.74 km SE of Howardville, MissouriSun, Jul 22, 3:54 AM CDT · 5184 days ago · 6 km deep · 28 km away

From the USGS Earthquake Hazards Program and its partner networks, event nm609517. Read Thu, Oct 1, 2026, 11:54 AM UTC.