California earthquakes

M1.5 earthquake 6km NW of Pacifica, CA

A magnitude 1.5 earthquake struck 6km NW of Pacifica, CA on Tue, Sep 15, 2020, 7:27 PM PDT (02:27 UTC), 7 km (4 mi) below the surface.

A larger quake followed: M3.5 10km NE of Milpitas, CA. This one was a foreshock.

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Map

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

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The earthquake

Magnitude
1.5 (Md, duration), micro
Magnitude from
Northern California Seismic System
Local time
UTC
2020-09-16 02:27:00 UTC
Depth
6.9 km (4.3 mi), shallow
Epicenter
37.659° N, 122.526° W
Tsunami flag
No
Status
Reviewed by a seismologist

Did you feel it?

No one has reported feeling this quake to the USGS.

How well it is located

Reviewed by a seismologist.

Location uncertainty
About 0.2 km horizontally, 0.3 km in depth
Magnitude uncertainty
±0.18
Depth from
From location
Station coverage gap
112°
Stations used
30

Nearest places

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

Nearby

Within 100 km, magnitude 1.5 and up: 54 in the 60 days after this one and 35 in the 30 days before it.

After

  1. 2.22km SW of Lexington Hills, CA · 2202 days ago · 12 km deep · 73 km away · felt by 2
  2. 2.27km S of Livermore, CA · 2199 days ago · 3 km deep · 67 km away · felt by 26
  3. 2.06km S of Livermore, CA · 2199 days ago · 4 km deep · 67 km away · felt by 1
  4. 2.310km NE of Milpitas, CA · 2198 days ago · 5 km deep · 65 km away
  5. 3.410km NE of Milpitas, CA · 2198 days ago · 5 km deep · 65 km away · felt by 1,065
  6. 2.010km NE of Milpitas, CA · 2198 days ago · 4 km deep · 64 km away · felt by 19
  7. 3.510km NE of Milpitas, CA · 2198 days ago · 5 km deep · 64 km away · felt by 1,428
  8. 2.010km NE of Milpitas, CA · 2198 days ago · 4 km deep · 64 km away · felt by 27
  9. 2.110km NE of Milpitas, CA · 2198 days ago · 4 km deep · 64 km away
  10. 1.810km NE of Milpitas, CA · 2198 days ago · 5 km deep · 64 km away
  11. 1.610km NE of Milpitas, CA · 2198 days ago · 5 km deep · 64 km away
  12. 1.910km NE of Milpitas, CA · 2197 days ago · 4 km deep · 64 km away
  13. 1.71km SW of Diablo, CA · 2197 days ago · 9 km deep · 53 km away
  14. 2.14km ESE of Berkeley, CA · 2197 days ago · 6 km deep · 34 km away · felt by 19
  15. 2.710km NE of Milpitas, CA · 2196 days ago · 5 km deep · 64 km away · felt by 43
  16. 2.910km NE of Milpitas, CA · 2196 days ago · 5 km deep · 64 km away · felt by 195
  17. 3.310km NE of Milpitas, CA · 2196 days ago · 5 km deep · 64 km away · felt by 1,024
  18. 1.97km S of Livermore, CA · 2196 days ago · 3 km deep · 67 km away · felt by 2
  19. 2.07km S of Livermore, CA · 2196 days ago · 4 km deep · 67 km away · felt by 4
  20. 2.610km NNE of Milpitas, CA · 2195 days ago · 9 km deep · 60 km away · felt by 27
  21. 1.710km NE of Milpitas, CA · 2195 days ago · 5 km deep · 65 km away
  22. 2.64km ESE of Berkeley, CA · 2195 days ago · 6 km deep · 34 km away · felt by 1,326
  23. 2.42km E of Berkeley, CA · 2195 days ago · 9 km deep · 34 km away · felt by 62
  24. 2.36km W of Glen Ellen, CA · 2194 days ago · 1 km deep · 79 km away · felt by 4
  25. 2.910km NE of Milpitas, CA · 2193 days ago · 5 km deep · 64 km away · felt by 103
  26. 2.62km ENE of Pleasant Hill, CA · 2192 days ago · 12 km deep · 54 km away · felt by 32
  27. 2.011km NE of Milpitas, CA · 2191 days ago · 5 km deep · 64 km away
  28. 2.110km NE of Milpitas, CA · 2189 days ago · 4 km deep · 64 km away · felt by 3
  29. 2.52km ENE of San Leandro, CA · 2188 days ago · 5 km deep · 35 km away · felt by 210
  30. 1.64km S of Larkfield-Wikiup, CA · 2188 days ago · 7 km deep · 94 km away
  31. 1.910km NE of Milpitas, CA · 2187 days ago · 5 km deep · 65 km away · felt by 1
  32. 1.96km WSW of St. Helena, CA · 2186 days ago · 9 km deep · 91 km away
  33. 2.210km NE of Milpitas, CA · 2184 days ago · 5 km deep · 65 km away · felt by 1
  34. 1.711km NE of Milpitas, CA · 2184 days ago · 5 km deep · 64 km away
  35. 2.77km N of Boulder Creek, CA · 2184 days ago · 9 km deep · 64 km away · felt by 201
  36. 2.33km ENE of San Ramon, CA · 2184 days ago · 11 km deep · 53 km away · felt by 5
  37. 1.76km W of Brentwood, CA · 2183 days ago · 15 km deep · 70 km away · felt by 2
  38. 1.911km NE of Milpitas, CA · 2181 days ago · 5 km deep · 64 km away
  39. 1.911km NE of Milpitas, CA · 2181 days ago · 4 km deep · 64 km away · felt by 1
  40. 1.88km SSW of Loyola, CA · 2180 days ago · 6 km deep · 56 km away · felt by 1
  41. 1.55km N of Kenwood, CA · 2176 days ago · 7 km deep · 89 km away
  42. 1.615km S of Half Moon Bay, CA · 2175 days ago · 11 km deep · 38 km away
  43. 1.54km SSE of Brentwood, CA · 2175 days ago · 11 km deep · 76 km away
  44. 1.85km NNE of Black Point-Green Point, CA · 2174 days ago · 4 km deep · 55 km away · felt by 4
  45. 1.76km NNE of Corralitos, CA · 2171 days ago · 8 km deep · 96 km away
  46. 1.616km E of Seven Trees, CA · 2169 days ago · 4 km deep · 86 km away
  47. 2.16km SSW of Yountville, CA · 2168 days ago · 8 km deep · 78 km away
  48. 1.76km SW of Yountville, CA · 2167 days ago · 11 km deep · 78 km away
  49. 1.55km N of Dublin, CA · 2165 days ago · 10 km deep · 53 km away
  50. 1.82km S of Angwin, CA · 2162 days ago · 12 km deep · 100 km away
  51. 1.92km NNE of Bethel Island, CA · 2161 days ago · 12 km deep · 89 km away · felt by 1
  52. 1.513km ESE of Alum Rock, CA · 2155 days ago · 6 km deep · 83 km away
  53. 1.95km NE of Alum Rock, CA · 2153 days ago · 0 km deep · 72 km away · felt by 14
  54. 1.53km NNW of Benicia, CA · 2153 days ago · 5 km deep · 55 km away · felt by 3

Before

  1. 2.110km ESE of Livermore, CA · 2210 days ago · 3 km deep · 76 km away · felt by 3
  2. 1.519km SSE of Livermore, CA · 2211 days ago · 3 km deep · 75 km away
  3. 1.518km W of Boulder Creek, CA · 2212 days ago · 8 km deep · 62 km away
  4. 1.63km ENE of Oakland, CA · 2212 days ago · 8 km deep · 33 km away
  5. 2.23km ENE of Walnut Creek, CA · 2216 days ago · 10 km deep · 52 km away · felt by 20
  6. 1.510km NE of Milpitas, CA · 2217 days ago · 4 km deep · 64 km away · felt by 1
  7. 2.64km SE of Larkfield-Wikiup, CA · 2217 days ago · 7 km deep · 94 km away · felt by 227
  8. 1.512km ESE of Alum Rock, CA · 2218 days ago · 9 km deep · 82 km away
  9. 3.23km ESE of San Leandro, CA · 2219 days ago · 9 km deep · 36 km away · felt by 3,304
  10. 2.63km ESE of San Leandro, CA · 2219 days ago · 9 km deep · 36 km away · felt by 226
  11. 1.82km N of Danville, CA · 2219 days ago · 9 km deep · 50 km away
  12. 1.58km WNW of Yountville, CA · 2220 days ago · 5 km deep · 85 km away
  13. 2.72km SSE of Crockett, CA · 2221 days ago · 10 km deep · 51 km away · felt by 611
  14. 2.32km NE of El Cerrito, CA · 2222 days ago · 8 km deep · 36 km away · felt by 99
  15. 1.66km ESE of Santa Rosa, CA · 2223 days ago · 10 km deep · 86 km away
  16. 2.010km NE of Milpitas, CA · 2224 days ago · 5 km deep · 64 km away
  17. 2.310km NE of Milpitas, CA · 2224 days ago · 5 km deep · 64 km away · felt by 8
  18. 1.810km E of Alum Rock, CA · 2225 days ago · 8 km deep · 79 km away
  19. 1.714km SW of Santa Cruz, CA · 2226 days ago · 12 km deep · 93 km away
  20. 1.76km E of Santa Rosa, CA · 2226 days ago · 10 km deep · 87 km away

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Sources

From the USGS Earthquake Hazards Program and its partner networks, event nc73458546. Read Sun, Oct 4, 2026, 7:00 PM UTC.