»Johnson County

Earthquake Information for Johnson County, Wyoming

Johnson County, WY has a low earthquake risk, with a total of 9 earthquakes since 1931. The USGS database shows that there is a 4.25% chance of a major earthquake within 50km of Johnson County, WY within the next 50 years. The largest earthquake within 30 miles of Johnson County, WY was a 4.8 Magnitude in 1976.

Risk Level:
Low

Total Number of Earthquakes in Johnson County since 1931

9

Probability of A 5.0 Earthquake within next 50 years

4.25%

Most Recent
Largest

12/30/2021 - 2.9 mag, 7.6mi depth 11 mi from Buffalo, WY
4/11/2013 - 2.8 mag, 7.9mi depth 21 mi from Kaycee, WY
12/14/2009 - 2.7 mag, 14.0mi depth 16 mi from Kaycee, WY
10/25/2009 - 3.0 mag, 5.0mi depth 21 mi from Buffalo, WY
8/29/2006 - 3.2 mag, 5.0mi depth 23 mi from Buffalo, WY
8/17/2006 - 3.1 mag, 5.0mi depth 28 mi from Buffalo, WY
8/31/1992 - 3.6 mag, 5.0mi depth 22 mi from Kaycee, WY
2/22/1992 - 2.9 mag, 5.0mi depth 20 mi from Buffalo, WY
9/3/1976 - 4.8 mag, 10.0mi depth 33 mi from Kaycee, WY

9/3/1976 - 4.8 mag, 10.0mi depth 33 mi from Kaycee, WY
8/31/1992 - 3.6 mag, 5.0mi depth 22 mi from Kaycee, WY
8/29/2006 - 3.2 mag, 5.0mi depth 23 mi from Buffalo, WY
8/17/2006 - 3.1 mag, 5.0mi depth 28 mi from Buffalo, WY
10/25/2009 - 3.0 mag, 5.0mi depth 21 mi from Buffalo, WY
12/30/2021 - 2.9 mag, 7.6mi depth 11 mi from Buffalo, WY
2/22/1992 - 2.9 mag, 5.0mi depth 20 mi from Buffalo, WY
4/11/2013 - 2.8 mag, 7.9mi depth 21 mi from Kaycee, WY
12/14/2009 - 2.7 mag, 14.0mi depth 16 mi from Kaycee, WY

View All

Earthquake Probability for Johnson County, WY

View the probability of a major earthquake within the next 50 years in Johnson County, WY.

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

(within 31 km/51 miles above magnitude)

5.0

4.25%

5.1

3.42%

5.2

3.42%

5.2

3.42%

5.3

2.74%

5.4

2.20%

5.5

1.76%

5.6

1.62%

5.7

1.29%

5.8

1.12%

5.9

0.89%

6.0

0.81%

6.1

0.62%

6.2

0.52%

6.3

0.38%

6.4

0.33%

6.5

0.22%

6.6

0.16%

6.7

0.14%

6.8

0.06%

6.9

0.03%

7.0

0.02%

7.1

0.01%

7.2

0.00%

7.3

0.00%

7.4

0.00%

7.5

0.00%

7.6

0.00%

7.7

0.00%

7.8

0.00%

7.9

0.00%

8.0

0.00%

8.1

0.00%

8.2

0.00%

8.3

0.00%

8.4

0.00%

8.5

0.00%

8.6

0.00%

8.7

0.00%

8.8

0.00%

8.9

0.00%

9.0

0.00%

9.1

0.00%

9.2

0.00%

Earthquake Count for Johnson County, WY

View the number of earthquake incidents in Johnson County, WY by year that are more than 2.5 Magnitude.

List of Earthquake Incidents for Johnson County, WY

Total Number of Earthquakes in Johnson County, WY within 30 miles. All distances and depths in the table are measured in miles.

Date

Magnitude

Depth

12/30/2021

2.9

7.6

Details

04/11/2013

2.8

7.9

Details

12/14/2009

2.7

14.0

Details

10/25/2009

3.0

5.0

Details

08/29/2006

3.2

5.0

Details

08/17/2006

3.1

5.0

Details

08/31/1992

3.6

5.0

Details

02/22/1992

2.9

5.0

Details

09/03/1976

4.8

10.0

Details

Risk Of Natural Disasters In Johnson County, WY

Radon Risk High
Tornado Risk Very Low
UV Index Risk Moderate

Earthquake Information for Johnson County, Wyoming

Earthquake Probability for Johnson County, WY

Probability of Earthquakes Within the Next 50 Years For Magnitudes Between 5.0 and 9.2

Earthquake Count for Johnson County, WY

List of Earthquake Incidents for Johnson County, WY

Risk Of Natural Disasters In Johnson County, WY

Related Pages

Wyoming Earthquakes by City