Kansas earthquakes

M3.5 earthquake 10 km NNE of Harper, Kansas

A magnitude 3.5 earthquake struck 10 km NNE of Harper, Kansas on Wed, Oct 3, 2018, 2:36 AM CDT (07:36 UTC), 5 km (3 mi) below the surface.

Harper forecastMore in Kansas

Map

Where this earthquake was located, with the others nearby. Select one for its page.

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The earthquake

Magnitude
3.5 (mb_lg), minor
Local time
UTC
2018-10-03 07:36:41 UTC
Depth
5.0 km (3.1 mi), shallow
Epicenter
37.371° N, 97.984° W
Region
Kansas
Felt reports
7
Strongest shaking
III, weak shaking
Tsunami flag
No
Status
Reviewed by a seismologist

Shaking

The USGS ShakeMap: shaking estimated from seismic stations and the quake’s size, on the Modified Mercalli intensity scale.

Strongest estimated
III, weak shaking
Peak ground acceleration
1867.0% of gravity
Peak ground velocity
1.0 cm/s
Map
Automatic
USGS ShakeMap: estimated shaking intensity around the epicenter
Estimated shaking intensity. Map: USGS ShakeMap.

Did you feel it?

7 people reported to the USGS what they felt; the strongest reported shaking was III, weak shaking.

Did You Feel It? map: shaking reported by the public
Shaking reported by the public, by area. Map: USGS Did You Feel It?

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 1.1 km horizontally, 1.7 km in depth
Magnitude uncertainty
±0.04
Depth from
Operator assigned
Station coverage gap
90°
Stations used
42

Nearest places

Distance and direction from each place to the epicenter, with its forecast.

Nearby

Within 100 km, magnitude 1.5 and up: 53 in the 60 days after this one and 42 in the 30 days before it.

After

  1. 2.610 km W of Lamont, Oklahoma · 2908 days ago · 6 km deep · 79 km away
  2. 2.710 km ESE of Jefferson, Oklahoma · 2905 days ago · 4 km deep · 80 km away
  3. 3.55 km NE of Medford, Oklahoma · 2904 days ago · 3 km deep · 64 km away · felt by 1
  4. 2.86 km NE of Medford, Oklahoma · 2903 days ago · 6 km deep · 64 km away
  5. 2.85 km E of Bluff City, Kansas · 2903 days ago · 7 km deep · 35 km away · felt by 3
  6. 2.2Kansas · 2903 days ago · 7 km deep · 35 km away
  7. 2.79 km ENE of Nash, Oklahoma · 2902 days ago · 7 km deep · 73 km away
  8. 1.66 km NNW of Harper, Kansas · 2902 days ago · 8 km deep · 7 km away
  9. 1.94 km E of Bluff City, Kansas · 2901 days ago · 7 km deep · 35 km away
  10. 1.86 km NNW of Harper, Kansas · 2901 days ago · 8 km deep · 7 km away
  11. 1.84 km E of Bluff City, Kansas · 2901 days ago · 7 km deep · 35 km away
  12. 1.74 km E of Bluff City, Kansas · 2900 days ago · 7 km deep · 35 km away
  13. 2.08 km WSW of Hunnewell, Kansas · 2900 days ago · 6 km deep · 62 km away
  14. 2.25 km E of Bluff City, Kansas · 2900 days ago · 7 km deep · 35 km away
  15. 1.75 km E of Bluff City, Kansas · 2900 days ago · 7 km deep · 35 km away
  16. 1.73 km E of Milan, Kansas · 2898 days ago · 5 km deep · 33 km away
  17. 2.76 km NE of Medford, Oklahoma · 2897 days ago · 6 km deep · 64 km away
  18. 2.95 km E of Bluff City, Kansas · 2897 days ago · 7 km deep · 35 km away · felt by 2
  19. 1.75 km E of Bluff City, Kansas · 2897 days ago · 7 km deep · 35 km away
  20. 2.34 km E of Bluff City, Kansas · 2897 days ago · 7 km deep · 35 km away
  21. 2.84 km E of Bluff City, Kansas · 2896 days ago · 7 km deep · 35 km away · felt by 1
  22. 2.54 km E of Bluff City, Kansas · 2896 days ago · 7 km deep · 36 km away
  23. 2.34 km E of Bluff City, Kansas · 2896 days ago · 7 km deep · 35 km away
  24. 1.66 km NW of Argonia, Kansas · 2894 days ago · 7 km deep · 17 km away
  25. 1.510 km NNW of Caldwell, Kansas · 2892 days ago · 2 km deep · 41 km away
  26. 1.51 km NW of Freeport, Kansas · 2887 days ago · 2 km deep · 20 km away
  27. 1.69 km WSW of Hunnewell, Kansas · 2887 days ago · 5 km deep · 61 km away
  28. 2.65 km W of Medford, Oklahoma · 2887 days ago · 7 km deep · 65 km away
  29. 1.64 km E of Bluff City, Kansas · 2885 days ago · 7 km deep · 35 km away
  30. 2.011 km NE of Wakita, Oklahoma · 2878 days ago · 8 km deep · 47 km away
  31. 2.7Oklahoma · 2878 days ago · 5 km deep · 69 km away
  32. 1.911 km NE of Wakita, Oklahoma · 2878 days ago · 7 km deep · 47 km away
  33. 1.611 km NE of Wakita, Oklahoma · 2877 days ago · 7 km deep · 47 km away
  34. 2.311 km NE of Wakita, Oklahoma · 2876 days ago · 8 km deep · 47 km away · felt by 1
  35. 2.510 km W of Lamont, Oklahoma · 2875 days ago · 7 km deep · 80 km away
  36. 2.45 km NE of Medford, Oklahoma · 2874 days ago · 5 km deep · 64 km away
  37. 2.78 km ENE of Nescatunga, Oklahoma · 2872 days ago · 7 km deep · 67 km away
  38. 2.58 km ESE of Manchester, Oklahoma · 2869 days ago · 5 km deep · 46 km away
  39. 2.511 km SE of Clearwater, Kansas · 2868 days ago · 5 km deep · 51 km away · felt by 2
  40. 2.91 km S of Medford, Oklahoma · 2868 days ago · 5 km deep · 68 km away · felt by 2
  41. 3.011 km NE of Wakita, Oklahoma · 2867 days ago · 7 km deep · 47 km away · felt by 3
  42. 2.74 km NNE of Cherokee, Oklahoma · 2866 days ago · 3 km deep · 72 km away · felt by 33
  43. 2.88 km NNE of Harper, Kansas · 2865 days ago · 2 km deep · 2 km away · felt by 2
  44. 2.79 km NNE of Harper, Kansas · 2865 days ago · 5 km deep · 1 km away · felt by 2
  45. 2.23 km E of Freeport, Kansas · 2863 days ago · 4 km deep · 24 km away
  46. 1.97 km NNW of Argonia, Kansas · 2862 days ago · 7 km deep · 16 km away
  47. 3.14 km N of Wakita, Oklahoma · 2860 days ago · 5 km deep · 50 km away · felt by 5
  48. 1.710 km SE of Freeport, Kansas · 2859 days ago · 5 km deep · 33 km away
  49. 1.9Kansas · 2857 days ago · 6 km deep · 35 km away
  50. 1.84 km E of Bluff City, Kansas · 2857 days ago · 6 km deep · 35 km away
  51. 2.52 km ENE of Medford, Oklahoma · 2857 days ago · 6 km deep · 66 km away · felt by 2
  52. 3.29 km NNE of Harper, Kansas · 2852 days ago · 6 km deep · 2 km away · felt by 9
  53. 2.59 km ESE of Jefferson, Oklahoma · 2852 days ago · 9 km deep · 80 km away · felt by 1

Before

  1. 1.511 km SE of Mayfield, Kansas · 2911 days ago · 6 km deep · 51 km away
  2. 1.911 km SE of Mayfield, Kansas · 2913 days ago · 6 km deep · 51 km away
  3. 3.011 km SE of Mayfield, Kansas · 2913 days ago · 6 km deep · 51 km away · felt by 4
  4. 2.211 km SE of Mayfield, Kansas · 2913 days ago · 6 km deep · 51 km away
  5. 2.111 km SE of Mayfield, Kansas · 2914 days ago · 5 km deep · 51 km away
  6. 2.611 km SW of Wellington, Kansas · 2914 days ago · 7 km deep · 52 km away · felt by 2
  7. 1.611 km SE of Mayfield, Kansas · 2914 days ago · 6 km deep · 51 km away
  8. 1.711 km SE of Mayfield, Kansas · 2914 days ago · 7 km deep · 51 km away
  9. 2.811 km SE of Mayfield, Kansas · 2915 days ago · 6 km deep · 51 km away
  10. 2.811 km SE of Mayfield, Kansas · 2915 days ago · 6 km deep · 51 km away · felt by 2
  11. 2.211 km SE of Mayfield, Kansas · 2915 days ago · 6 km deep · 51 km away
  12. 1.711 km SE of Mayfield, Kansas · 2916 days ago · 5 km deep · 51 km away
  13. 2.311 km SE of Mayfield, Kansas · 2916 days ago · 6 km deep · 51 km away
  14. 2.15 km W of Danville, Kansas · 2921 days ago · 4 km deep · 10 km away
  15. 2.05 km W of Danville, Kansas · 2921 days ago · 4 km deep · 10 km away
  16. 2.36 km NNE of Danville, Kansas · 2923 days ago · 5 km deep · 11 km away
  17. 1.66 km NNW of Argonia, Kansas · 2925 days ago · 3 km deep · 17 km away
  18. 2.12 km SSE of Bluff City, Kansas · 2929 days ago · 9 km deep · 37 km away · felt by 1
  19. 2.68 km WSW of Hunnewell, Kansas · 2930 days ago · 6 km deep · 61 km away · felt by 1
  20. 2.78 km WSW of Hunnewell, Kansas · 2930 days ago · 5 km deep · 62 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event us1000h656. Read Tue, Sep 22, 2026, 8:00 AM UTC.