M1.6 earthquake 15km S of Half Moon Bay, CA

Magnitude

1.6 (Md, duration), micro

Magnitude from

Northern California Seismic System

Local time

Tue, Oct 20, 2020, 6:12 PM PDT

UTC

2020-10-21 01:12:12 UTC

Depth

11.4 km (7.1 mi), shallow

Epicenter

37.327° N, 122.424° W

Region

California

Tsunami flag

No

Status

Reviewed by a seismologist

Location uncertainty

About 0.4 km horizontally, 1.0 km in depth

Magnitude uncertainty

±0.15

Depth from

From location

Station coverage gap

198°, poorly surrounded by stations

Stations used

18

• Pescadero, CaliforniaPopulation 643. Forecast9 kmNNW
• Half Moon Bay, CaliforniaPopulation 12,657. Forecast15 kmS
• San Mateo, CaliforniaPopulation 103,536. Forecast28 kmSSW
• Los Angeles, CaliforniaPopulation 3,820,914. Forecast524 kmNW

After

1. 1.54km SSE of Brentwood, CATue, Oct 20, 6:38 PM PDT · 2175 days ago · 11 km deep · 89 km away
2. 1.96km SSE of San Juan Bautista, CAWed, Oct 21, 12:11 AM PDT · 2175 days ago · 5 km deep · 99 km away
3. 1.85km NNE of Black Point-Green Point, CAWed, Oct 21, 5:01 PM PDT · 2174 days ago · 4 km deep · 92 km away · felt by 4
4. 1.62km NNE of Aromas, CAFri, Oct 23, 7:38 AM PDT · 2173 days ago · 2 km deep · 84 km away · felt by 2
5. 1.76km NNE of Corralitos, CASat, Oct 24, 6:45 PM PDT · 2171 days ago · 8 km deep · 66 km away
6. 1.616km E of Seven Trees, CAMon, Oct 26, 5:42 AM PDT · 2170 days ago · 4 km deep · 67 km away
7. 1.87km WSW of Gilroy, CAWed, Oct 28, 2:38 AM PDT · 2168 days ago · 4 km deep · 79 km away
8. 1.57km WSW of Gilroy, CAWed, Oct 28, 3:25 AM PDT · 2168 days ago · 4 km deep · 79 km away
9. 1.99km NE of San Martin, CAThu, Oct 29, 10:56 AM PDT · 2167 days ago · 7 km deep · 82 km away
10. 1.55km N of Dublin, CAFri, Oct 30, 1:37 AM PDT · 2166 days ago · 10 km deep · 64 km away
11. 1.67km S of Gilroy, CAMon, Nov 2, 12:38 AM PST · 2163 days ago · 4 km deep · 88 km away · felt by 2
12. 1.513km ESE of Alum Rock, CAMon, Nov 9, 8:23 PM PST · 2155 days ago · 6 km deep · 65 km away
13. 2.14km S of San Juan Bautista, CATue, Nov 10, 2:49 PM PST · 2154 days ago · 6 km deep · 98 km away
14. 1.95km NE of Alum Rock, CAWed, Nov 11, 1:51 AM PST · 2154 days ago · 0 km deep · 57 km away · felt by 14
15. 1.53km NNW of Benicia, CAWed, Nov 11, 4:30 AM PST · 2154 days ago · 5 km deep · 86 km away · felt by 3
16. 3.34km S of San Juan Bautista, CAWed, Nov 11, 12:26 PM PST · 2153 days ago · 7 km deep · 98 km away · felt by 293
17. 3.05km S of San Juan Bautista, CAWed, Nov 11, 12:48 PM PST · 2153 days ago · 6 km deep · 98 km away · felt by 41
18. 1.84km SSE of San Juan Bautista, CAThu, Nov 12, 1:29 PM PST · 2152 days ago · 3 km deep · 98 km away
19. 1.77km WSW of Gilroy, CAThu, Nov 12, 5:31 PM PST · 2152 days ago · 3 km deep · 79 km away
20. 1.86km WSW of Gilroy, CASun, Nov 15, 11:51 AM PST · 2149 days ago · 7 km deep · 81 km away
21. 2.32km ESE of Pleasanton, CATue, Nov 17, 12:01 AM PST · 2148 days ago · 14 km deep · 62 km away · felt by 3
22. 2.06km NNE of Pittsburg, CATue, Nov 17, 5:49 PM PST · 2147 days ago · 18 km deep · 97 km away
23. 2.08km N of Pittsburg, CATue, Nov 17, 8:33 PM PST · 2147 days ago · 20 km deep · 98 km away
24. 1.510km SSE of Sunol, CAThu, Nov 19, 6:19 AM PST · 2146 days ago · 6 km deep · 55 km away
25. 1.84km S of San Juan Bautista, CAThu, Nov 19, 12:23 PM PST · 2145 days ago · 6 km deep · 98 km away
26. 2.13km SW of San Juan Bautista, CAMon, Nov 23, 1:22 PM PST · 2141 days ago · 6 km deep · 94 km away
27. 2.211km NE of Milpitas, CATue, Nov 24, 5:28 AM PST · 2141 days ago · 5 km deep · 56 km away
28. 1.71km WSW of Pleasant Hill, CATue, Nov 24, 6:07 PM PST · 2140 days ago · 11 km deep · 75 km away · felt by 2
29. 1.63km ESE of Highlands-Baywood Park, CAFri, Nov 27, 12:16 PM PST · 2137 days ago · 4 km deep · 23 km away
30. 1.66km W of San Francisco Zoo, CASun, Nov 29, 12:55 AM PST · 2136 days ago · 10 km deep · 48 km away
31. 1.76km SSW of Gilroy, CASun, Nov 29, 4:57 AM PST · 2136 days ago · 7 km deep · 84 km away
32. 1.87km N of Pittsburg, CASun, Nov 29, 5:44 AM PST · 2136 days ago · 18 km deep · 97 km away
33. 2.34km SW of Moss Landing, CAMon, Nov 30, 11:42 PM PST · 2134 days ago · 8 km deep · 81 km away · felt by 4
34. 1.68km ENE of Alum Rock, CAThu, Dec 3, 12:58 PM PST · 2131 days ago · 7 km deep · 60 km away
35. 1.83km ESE of Berkeley, CASun, Dec 6, 6:50 PM PST · 2128 days ago · 9 km deep · 62 km away
36. 1.75km S of Blackhawk, CAMon, Dec 7, 11:53 AM PST · 2127 days ago · 16 km deep · 67 km away
37. 1.82km N of Knightsen, CAFri, Dec 11, 1:10 AM PST · 2124 days ago · 8 km deep · 99 km away
38. 3.710km ENE of Morgan Hill, CATue, Dec 15, 6:58 AM PST · 2120 days ago · 4 km deep · 80 km away · felt by 2,305
39. 3.510km ENE of Morgan Hill, CATue, Dec 15, 6:59 AM PST · 2120 days ago · 4 km deep · 80 km away · felt by 597
40. 1.62km N of El Cerrito, CATue, Dec 15, 7:02 AM PST · 2120 days ago · 3 km deep · 68 km away · felt by 24
41. 2.02km E of Pacheco, CAWed, Dec 16, 2:24 AM PST · 2119 days ago · 15 km deep · 80 km away
42. 2.34km WNW of Dublin, CAThu, Dec 17, 5:11 PM PST · 2117 days ago · 10 km deep · 58 km away · felt by 16
43. 1.74km WNW of Dublin, CAThu, Dec 17, 5:37 PM PST · 2117 days ago · 10 km deep · 58 km away
44. 1.74km WNW of Dublin, CAThu, Dec 17, 6:16 PM PST · 2117 days ago · 10 km deep · 58 km away
45. 2.14km WNW of Dublin, CAFri, Dec 18, 3:17 AM PST · 2117 days ago · 10 km deep · 58 km away · felt by 2
46. 2.14km ESE of Hayward, CAFri, Dec 18, 10:52 AM PST · 2117 days ago · 7 km deep · 48 km away

Before

1. 2.26km WSW of Gilroy, CAMon, Oct 19, 2:35 PM PDT · 2176 days ago · 4 km deep · 80 km away · felt by 2
2. 2.17km ENE of Aromas, CAMon, Oct 19, 10:19 AM PDT · 2177 days ago · 6 km deep · 88 km away
3. 2.06km WSW of Gilroy, CASat, Oct 17, 1:14 PM PDT · 2178 days ago · 3 km deep · 80 km away
4. 1.95km WNW of San Juan Bautista, CASat, Oct 17, 1:05 PM PDT · 2178 days ago · 5 km deep · 90 km away
5. 1.85km WNW of San Juan Bautista, CASat, Oct 17, 8:36 AM PDT · 2179 days ago · 5 km deep · 91 km away
6. 2.23km ESE of Aromas, CAThu, Oct 15, 9:32 PM PDT · 2180 days ago · 6 km deep · 88 km away
7. 1.88km SSW of Loyola, CAThu, Oct 15, 9:11 AM PDT · 2181 days ago · 6 km deep · 28 km away · felt by 1
8. 2.57km WSW of Gilroy, CAThu, Oct 15, 8:17 AM PDT · 2181 days ago · 4 km deep · 80 km away · felt by 34
9. 1.911km NE of Milpitas, CAWed, Oct 14, 8:32 AM PDT · 2182 days ago · 4 km deep · 56 km away · felt by 1
10. 1.911km NE of Milpitas, CAWed, Oct 14, 7:52 AM PDT · 2182 days ago · 5 km deep · 56 km away
11. 1.76km W of Brentwood, CAMon, Oct 12, 2:07 AM PDT · 2184 days ago · 15 km deep · 87 km away · felt by 2
12. 2.33km ENE of San Ramon, CASun, Oct 11, 6:16 PM PDT · 2184 days ago · 11 km deep · 66 km away · felt by 5
13. 2.77km N of Boulder Creek, CASun, Oct 11, 9:36 AM PDT · 2185 days ago · 9 km deep · 31 km away · felt by 201
14. 1.711km NE of Milpitas, CASun, Oct 11, 7:01 AM PDT · 2185 days ago · 5 km deep · 56 km away
15. 2.210km NE of Milpitas, CASun, Oct 11, 4:43 AM PDT · 2185 days ago · 5 km deep · 56 km away · felt by 1
16. 2.27km WSW of Gilroy, CAFri, Oct 9, 12:00 AM PDT · 2187 days ago · 4 km deep · 79 km away · felt by 9
17. 1.910km NE of Milpitas, CAThu, Oct 8, 8:15 AM PDT · 2188 days ago · 5 km deep · 56 km away · felt by 1
18. 2.52km ENE of San Leandro, CAWed, Oct 7, 4:47 AM PDT · 2189 days ago · 5 km deep · 52 km away · felt by 210
19. 2.110km NE of Milpitas, CATue, Oct 6, 9:21 AM PDT · 2190 days ago · 4 km deep · 56 km away · felt by 3
20. 2.011km NE of Milpitas, CASun, Oct 4, 10:52 AM PDT · 2192 days ago · 5 km deep · 56 km away

From the USGS Earthquake Hazards Program and its partner networks, event nc73473321. Read Mon, Oct 5, 2026, 7:01 AM UTC.