M1.8 earthquake 12 km SE of Challis, Idaho

Magnitude

1.8 (ML, local (Richter)), micro

Magnitude from

Montana Bureau of Mines and Geology

Local time

Fri, Dec 8, 2017, 12:21 PM MST

UTC

2017-12-08 19:21:33 UTC

Depth

5.0 km (3.1 mi), shallow

Epicenter

44.422° N, 114.118° W

Region

Idaho

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.8 km horizontally, 31.6 km in depth

Magnitude uncertainty

±0.35

Depth from

Operator assigned

Station coverage gap

114°

Stations used

8

• Challis, IdahoPopulation 1,043. Forecast13 kmSE
• Boise, IdahoPopulation 235,684. Forecast189 kmENE
• Calgary, CanadaPopulation 1,306,784. Forecast737 kmS

After

1. 2.110 km W of Clayton, IdahoSun, Dec 17, 11:51 PM MST · 3211 days ago · 10 km deep · 38 km away
2. 2.76 km WNW of Clayton, IdahoThu, Dec 21, 4:31 AM MST · 3207 days ago · 10 km deep · 32 km away · felt by 2
3. 1.824 km SSW of Clayton, IdahoThu, Dec 28, 12:14 AM MST · 3201 days ago · 8 km deep · 52 km away
4. 2.012 km W of Clayton, IdahoMon, Jan 1, 6:04 AM MST · 3196 days ago · 9 km deep · 39 km away
5. 2.412 km E of Clayton, IdahoWed, Jan 10, 7:23 PM MST · 3187 days ago · 17 km deep · 20 km away
6. 2.525 km E of Clayton, IdahoThu, Jan 11, 12:31 AM MST · 3187 days ago · 15 km deep · 22 km away
7. 2.211 km WSW of Challis, IdahoSun, Jan 14, 11:57 PM MST · 3183 days ago · 8 km deep · 19 km away
8. 2.213 km W of Clayton, IdahoThu, Jan 25, 8:13 PM MST · 3172 days ago · 13 km deep · 39 km away
9. 2.310 km NNW of Stanley, IdahoMon, Jan 29, 11:16 AM MST · 3168 days ago · 7 km deep · 70 km away
10. 1.810 km WNW of Clayton, IdahoTue, Jan 30, 5:29 AM MST · 3167 days ago · 9 km deep · 36 km away
11. 2.013 km W of Clayton, IdahoWed, Jan 31, 5:03 AM MST · 3166 days ago · 3 km deep · 41 km away
12. 2.520 km W of Clayton, IdahoWed, Jan 31, 1:44 PM MST · 3166 days ago · 10 km deep · 45 km away · felt by 3
13. 2.59 km WNW of Clayton, IdahoFri, Feb 2, 3:52 PM MST · 3164 days ago · 10 km deep · 35 km away

Before

1. 2.122 km SSW of Clayton, IdahoSun, Dec 3, 4:30 PM MST · 3225 days ago · 13 km deep · 49 km away
2. 1.921 km SSW of Clayton, IdahoSun, Dec 3, 6:28 AM MST · 3225 days ago · 7 km deep · 49 km away
3. 1.822 km SSW of Clayton, IdahoFri, Dec 1, 1:49 PM MST · 3227 days ago · 6 km deep · 50 km away
4. 2.322 km SSW of Clayton, IdahoFri, Dec 1, 1:41 PM MST · 3227 days ago · 11 km deep · 49 km away
5. 2.021 km SSW of Clayton, IdahoFri, Dec 1, 6:14 AM MST · 3227 days ago · 6 km deep · 49 km away
6. 2.023 km SSW of Clayton, IdahoFri, Dec 1, 4:47 AM MST · 3227 days ago · 14 km deep · 50 km away
7. 1.822 km SSW of Clayton, IdahoFri, Dec 1, 4:34 AM MST · 3227 days ago · 8 km deep · 50 km away
8. 2.316 km S of Clayton, IdahoThu, Nov 30, 2:28 AM MST · 3228 days ago · 10 km deep · 40 km away
9. 1.622 km SSW of Clayton, IdahoSun, Nov 26, 10:42 PM MST · 3232 days ago · 7 km deep · 50 km away
10. 1.620 km ENE of Challis, IdahoFri, Nov 24, 4:11 PM MST · 3234 days ago · 9 km deep · 22 km away
11. 2.422 km SSW of Clayton, IdahoThu, Nov 16, 1:37 PM MST · 3242 days ago · 10 km deep · 50 km away · felt by 4
12. 2.222 km SSW of Clayton, IdahoWed, Nov 8, 8:49 PM MST · 3250 days ago · 6 km deep · 50 km away
13. 1.722 km SSW of Clayton, IdahoWed, Nov 8, 8:27 PM MST · 3250 days ago · 9 km deep · 50 km away

From the USGS Earthquake Hazards Program and its partner networks, event mb80273634. Read Fri, Oct 2, 2026, 7:53 PM UTC.