M2.2 earthquake 7 km N of Helper, Utah

Magnitude

2.2 (md), micro

Local time

Sun, Mar 10, 1985, 5:20 AM MST

UTC

1985-03-10 12:20:03 UTC

Depth

2.9 km (1.8 mi), shallow

Epicenter

39.751° N, 110.851° W

Region

Utah

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 1.6 km horizontally, 2.0 km in depth

Depth from

From location

Station coverage gap

218°, poorly surrounded by stations

Stations used

13

• Helper, UtahPopulation 2,112. Forecast7 kmN
• Springville, UtahPopulation 32,286. Forecast80 kmSE
• Provo, UtahPopulation 115,162. Forecast87 kmSE
• Phoenix, ArizonaPopulation 1,650,070. Forecast709 kmN

After

1. 2.112 km NW of Helper, UtahSun, Mar 17, 7:55 PM MST · 15164 days ago · 5 km deep · 10 km away
2. 2.88 km NNE of Sunnyside, UtahThu, Apr 4, 6:01 PM MST · 15147 days ago · 3 km deep · 44 km away
3. 1.64 km SW of Levan, UtahTue, Apr 9, 10:27 AM MST · 15142 days ago · -1 km deep · 93 km away
4. 2.510 km NW of Helper, UtahTue, Apr 9, 5:40 PM MST · 15142 days ago · 3 km deep · 8 km away
5. 1.78 km NW of East Carbon City, UtahThu, Apr 18, 10:09 PM MST · 15132 days ago · -3 km deep · 35 km away
6. 2.38 km NNE of Sunnyside, UtahSun, Apr 21, 12:34 PM MST · 15130 days ago · 3 km deep · 44 km away
7. 1.93 km ENE of Sunnyside, UtahWed, Apr 24, 12:24 PM MST · 15127 days ago · 26 km deep · 47 km away
8. 2.38 km NNE of Sunnyside, UtahFri, Apr 26, 4:23 PM MST · 15125 days ago · 0 km deep · 45 km away
9. 1.612 km NW of Orangeville, UtahSat, Apr 27, 3:41 PM MST · 15124 days ago · 9 km deep · 56 km away
10. 2.47 km NNE of Sunnyside, UtahSat, May 4, 11:30 PM MDT · 15116 days ago · 3 km deep · 45 km away
11. 1.63 km SE of Fountain Green, UtahSun, May 5, 11:05 PM MDT · 15115 days ago · 4 km deep · 67 km away
12. 2.23 km SSE of Fountain Green, UtahSun, May 5, 11:52 PM MDT · 15115 days ago · 8 km deep · 68 km away
13. 2.92 km SSE of Fountain Green, UtahTue, May 7, 5:23 AM MDT · 15114 days ago · 6 km deep · 68 km away
14. 2.27 km N of Sunnyside, UtahTue, May 7, 1:30 PM MDT · 15114 days ago · 3 km deep · 41 km away
15. 2.47 km NNE of Sunnyside, UtahTue, May 7, 3:58 PM MDT · 15114 days ago · 7 km deep · 44 km away
16. 2.48 km NNE of Sunnyside, UtahTue, May 7, 9:24 PM MDT · 15113 days ago · 4 km deep · 44 km away

Before

1. 2.312 km ENE of Kenilworth, UtahMon, Mar 4, 11:00 AM MST · 15178 days ago · -2 km deep · 16 km away
2. 1.97 km ENE of Kenilworth, UtahWed, Feb 27, 6:54 PM MST · 15183 days ago · -3 km deep · 12 km away
3. 1.719 km ESE of Mount Pleasant, UtahFri, Feb 22, 10:09 PM MST · 15187 days ago · 3 km deep · 45 km away
4. 1.615 km ESE of Mount Pleasant, UtahFri, Feb 22, 10:02 PM MST · 15187 days ago · 5 km deep · 48 km away
5. 2.06 km NW of Hiawatha, UtahMon, Feb 11, 12:43 PM MST · 15199 days ago · 5 km deep · 31 km away
6. 1.911 km NW of Orangeville, UtahSun, Feb 10, 12:43 PM MST · 15200 days ago · 8 km deep · 55 km away

From the USGS Earthquake Hazards Program and its partner networks, event uu50020290. Read Wed, Sep 23, 2026, 2:06 PM UTC.