M1.6 earthquake 15 km ESE of Mount Pleasant, Utah

Magnitude

1.6 (md), micro

Local time

Fri, Feb 22, 1985, 10:02 PM MST

UTC

1985-02-23 05:02:33 UTC

Depth

4.7 km (2.9 mi), shallow

Epicenter

39.489° N, 111.296° W

Region

Utah

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.8 km horizontally, 14.4 km in depth

Depth from

From location

Station coverage gap

185°, poorly surrounded by stations

Stations used

9

• Mount Pleasant, UtahPopulation 3,299. Forecast15 kmESE
• Santaquin, UtahPopulation 10,572. Forecast68 kmSE
• Provo, UtahPopulation 115,162. Forecast88 kmSSE
• Phoenix, ArizonaPopulation 1,650,070. Forecast675 kmN

After

1. 1.719 km ESE of Mount Pleasant, UtahFri, Feb 22, 10:09 PM MST · 15186 days ago · 3 km deep · 4 km away
2. 1.62 km ESE of Redmond, UtahWed, Feb 27, 1:04 PM MST · 15182 days ago · 10 km deep · 72 km away
3. 1.97 km ENE of Kenilworth, UtahWed, Feb 27, 6:54 PM MST · 15181 days ago · -3 km deep · 55 km away
4. 2.312 km ENE of Kenilworth, UtahMon, Mar 4, 11:00 AM MST · 15177 days ago · -2 km deep · 59 km away
5. 2.27 km N of Helper, UtahSun, Mar 10, 5:20 AM MST · 15171 days ago · 3 km deep · 48 km away
6. 2.112 km NW of Helper, UtahSun, Mar 17, 7:55 PM MST · 15163 days ago · 5 km deep · 42 km away
7. 1.57 km ENE of Leamington, UtahMon, Mar 18, 3:07 PM MST · 15163 days ago · 1 km deep · 77 km away
8. 2.88 km NNE of Sunnyside, UtahThu, Apr 4, 6:01 PM MST · 15145 days ago · 3 km deep · 81 km away
9. 1.64 km SW of Levan, UtahTue, Apr 9, 10:27 AM MST · 15141 days ago · -1 km deep · 52 km away
10. 2.510 km NW of Helper, UtahTue, Apr 9, 5:40 PM MST · 15141 days ago · 3 km deep · 42 km away
11. 1.525 km WSW of Emery, UtahFri, Apr 12, 7:26 PM MST · 15137 days ago · 6 km deep · 76 km away
12. 1.78 km NW of East Carbon City, UtahThu, Apr 18, 10:09 PM MST · 15131 days ago · -3 km deep · 71 km away
13. 2.38 km NNE of Sunnyside, UtahSun, Apr 21, 12:34 PM MST · 15129 days ago · 3 km deep · 82 km away

Before

1. 1.66 km E of Leamington, UtahTue, Feb 19, 3:07 PM MST · 15190 days ago · 4 km deep · 78 km away
2. 2.06 km NW of Hiawatha, UtahMon, Feb 11, 12:43 PM MST · 15198 days ago · 5 km deep · 20 km away
3. 2.07 km ENE of Sigurd, UtahMon, Feb 11, 1:41 AM MST · 15198 days ago · 10 km deep · 87 km away
4. 2.07 km E of Sigurd, UtahMon, Feb 11, 1:39 AM MST · 15198 days ago · 11 km deep · 87 km away
5. 1.65 km E of Sigurd, UtahMon, Feb 11, 1:34 AM MST · 15198 days ago · 2 km deep · 89 km away
6. 1.86 km ENE of Sigurd, UtahMon, Feb 11, 1:04 AM MST · 15198 days ago · 10 km deep · 88 km away
7. 1.87 km E of Sigurd, UtahMon, Feb 11, 12:21 AM MST · 15198 days ago · 13 km deep · 87 km away
8. 1.66 km E of Sigurd, UtahMon, Feb 11, 12:07 AM MST · 15198 days ago · 4 km deep · 88 km away
9. 1.911 km NW of Orangeville, UtahSun, Feb 10, 12:43 PM MST · 15199 days ago · 8 km deep · 25 km away
10. 2.412 km W of Mona, UtahTue, Feb 5, 8:07 PM MST · 15203 days ago · 6 km deep · 72 km away
11. 1.79 km NW of Fayette, UtahFri, Feb 1, 9:51 PM MST · 15207 days ago · -3 km deep · 58 km away
12. 1.928 km ESE of Mapleton, UtahFri, Jan 25, 8:26 PM MST · 15214 days ago · 8 km deep · 60 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu50019350. Read Tue, Sep 22, 2026, 12:17 PM UTC.