M1.8 earthquake Utah

Magnitude

1.8 (md), micro

Local time

Mon, Dec 14, 1987, 9:39 AM MST

UTC

1987-12-14 16:39:09 UTC

Depth

7.8 km (4.9 mi), shallow

Epicenter

41.189° N, 113.160° W

Region

Utah

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.5 km horizontally, 0.8 km in depth

Depth from

From location

Station coverage gap

115°

Stations used

7

• Hooper, UtahPopulation 8,214. Forecast87 kmW
• Grantsville, UtahPopulation 10,027. Forecast88 kmNW
• West Valley City, UtahPopulation 136,208. Forecast112 kmWNW
• Phoenix, ArizonaPopulation 1,650,070. Forecast866 kmN

After

1. 1.69 km NNE of Howell, UtahMon, Dec 14, 5:43 PM MST · 14162 days ago · 11 km deep · 99 km away
2. 1.986 km W of Hooper, UtahTue, Dec 15, 11:00 AM MST · 14161 days ago · 5 km deep · 1 km away
3. 2.386 km E of Montello, NevadaSat, Dec 19, 2:57 PM MST · 14157 days ago · 6 km deep · 0 km away
4. 2.613 km ESE of Snowville, UtahSun, Dec 20, 6:15 PM MST · 14156 days ago · 7 km deep · 97 km away
5. 1.886 km E of Montello, NevadaTue, Dec 22, 5:55 AM MST · 14155 days ago · 7 km deep · 1 km away
6. 1.784 km E of Montello, NevadaThu, Dec 24, 1:23 PM MST · 14152 days ago · 4 km deep · 4 km away
7. 1.685 km E of Montello, NevadaWed, Jan 6, 12:04 PM MST · 14139 days ago · 6 km deep · 1 km away
8. 1.586 km E of Montello, NevadaWed, Jan 6, 2:10 PM MST · 14139 days ago · 7 km deep · 0 km away
9. 1.683 km E of Montello, NevadaWed, Jan 6, 9:11 PM MST · 14139 days ago · 5 km deep · 5 km away
10. 1.786 km E of Montello, NevadaThu, Jan 7, 6:36 PM MST · 14138 days ago · 7 km deep · 1 km away
11. 1.683 km E of Montello, NevadaFri, Jan 8, 2:32 PM MST · 14137 days ago · 4 km deep · 5 km away
12. 1.649 km WNW of Hooper, UtahWed, Jan 13, 6:21 PM MST · 14132 days ago · 5 km deep · 39 km away
13. 1.985 km E of Montello, NevadaWed, Jan 27, 4:22 PM MST · 14118 days ago · 6 km deep · 3 km away
14. 1.685 km E of Montello, NevadaWed, Jan 27, 4:35 PM MST · 14118 days ago · 6 km deep · 3 km away
15. 2.184 km E of Montello, NevadaWed, Jan 27, 4:39 PM MST · 14118 days ago · 8 km deep · 3 km away
16. 3.087 km E of Montello, NevadaThu, Jan 28, 5:58 PM MST · 14117 days ago · 9 km deep · 1 km away
17. 2.185 km E of Montello, NevadaThu, Jan 28, 6:09 PM MST · 14117 days ago · 9 km deep · 2 km away
18. 1.585 km E of Montello, NevadaFri, Jan 29, 4:01 AM MST · 14117 days ago · 8 km deep · 3 km away
19. 1.985 km E of Montello, NevadaFri, Jan 29, 6:44 PM MST · 14116 days ago · 9 km deep · 2 km away
20. 3.085 km E of Montello, NevadaFri, Jan 29, 10:37 PM MST · 14116 days ago · 9 km deep · 2 km away
21. 2.385 km E of Montello, NevadaFri, Jan 29, 10:39 PM MST · 14116 days ago · 9 km deep · 2 km away
22. 2.785 km E of Montello, NevadaSat, Jan 30, 2:02 AM MST · 14116 days ago · 10 km deep · 2 km away
23. 1.784 km E of Montello, NevadaSat, Jan 30, 2:17 AM MST · 14116 days ago · 9 km deep · 2 km away
24. 1.785 km E of Montello, NevadaSat, Jan 30, 7:40 AM MST · 14116 days ago · 7 km deep · 3 km away
25. 1.684 km E of Montello, NevadaWed, Feb 3, 4:12 PM MST · 14111 days ago · 7 km deep · 2 km away
26. 1.885 km E of Montello, NevadaThu, Feb 4, 7:27 PM MST · 14110 days ago · 10 km deep · 2 km away
27. 1.685 km E of Montello, NevadaFri, Feb 5, 1:36 AM MST · 14110 days ago · 7 km deep · 3 km away
28. 2.883 km E of Montello, NevadaFri, Feb 5, 9:14 AM MST · 14109 days ago · 9 km deep · 4 km away
29. 1.584 km E of Montello, NevadaSat, Feb 6, 11:40 AM MST · 14108 days ago · 4 km deep · 5 km away
30. 1.985 km E of Montello, NevadaMon, Feb 8, 4:54 PM MST · 14106 days ago · 6 km deep · 2 km away
31. 2.183 km E of Montello, NevadaWed, Feb 10, 3:07 AM MST · 14105 days ago · 4 km deep · 4 km away
32. 1.783 km E of Montello, NevadaWed, Feb 10, 10:55 AM MST · 14104 days ago · 5 km deep · 4 km away
33. 2.18 km WNW of Bear River City, UtahFri, Feb 12, 3:57 AM MST · 14103 days ago · 4 km deep · 92 km away

Before

1. 2.285 km E of Montello, NevadaFri, Dec 11, 6:05 AM MST · 14166 days ago · 4 km deep · 3 km away
2. 1.786 km E of Montello, NevadaWed, Dec 2, 5:28 PM MST · 14174 days ago · 8 km deep · 1 km away
3. 1.69 km ENE of Howell, UtahMon, Nov 30, 6:07 PM MST · 14176 days ago · 4 km deep · 99 km away
4. 1.612 km SE of Snowville, UtahSun, Nov 29, 8:58 AM MST · 14177 days ago · 4 km deep · 91 km away
5. 1.685 km E of Montello, NevadaSun, Nov 29, 5:48 AM MST · 14178 days ago · 4 km deep · 2 km away
6. 1.613 km SE of Snowville, UtahSun, Nov 29, 12:06 AM MST · 14178 days ago · 7 km deep · 91 km away
7. 1.586 km E of Montello, NevadaFri, Nov 27, 3:05 PM MST · 14179 days ago · 6 km deep · 1 km away
8. 1.983 km E of Montello, NevadaFri, Nov 27, 7:45 AM MST · 14180 days ago · 9 km deep · 4 km away
9. 1.884 km E of Montello, NevadaFri, Nov 27, 2:43 AM MST · 14180 days ago · 4 km deep · 3 km away
10. 1.619 km SW of Thatcher, UtahTue, Nov 24, 8:13 PM MST · 14182 days ago · 0 km deep · 72 km away
11. 1.884 km E of Montello, NevadaMon, Nov 23, 4:04 AM MST · 14184 days ago · 5 km deep · 3 km away
12. 1.683 km E of Montello, NevadaTue, Nov 17, 5:34 PM MST · 14189 days ago · 5 km deep · 3 km away
13. 2.886 km E of Montello, NevadaTue, Nov 17, 9:20 AM MST · 14189 days ago · 8 km deep · 1 km away
14. 1.7UtahMon, Nov 16, 3:08 PM MST · 14190 days ago · 0 km deep · 2 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu50035030. Read Wed, Sep 23, 2026, 2:35 AM UTC.