Date and time | Mag Depth | Nearest volcano (distance) | Location | Details | Map |
| Thursday, October 28, 2021 08:03 GMT (3 earthquakes) | |||||
| Oct 28, 2021 1:03 am (GMT -7) (Oct 28, 2021 08:03 GMT) | ? n/a | 152 km (94 mi) | 1.9 mi west of El Monte, Los Angeles County, California, USA (unconfirmed) I FELT IT - 1 report | More | Map |
| Oct 27, 2021 11:23 pm (GMT -7) (Oct 28, 2021 06:23 GMT) | ? n/a | 168 km (104 mi) | 0.8 mi northwest of Bellflower, Los Angeles County, California, USA (unconfirmed) I FELT IT - 1 report | More | Map |
| Oct 27, 2021 8:00 pm (GMT -7) (Oct 28, 2021 03:00 GMT) | ? n/a | 112 km (70 mi) | 0.8 mi northeast of Riverside, California, USA (unconfirmed) I FELT IT - 1 report | More | Map |
| Wednesday, October 27, 2021 23:22 GMT (6 earthquakes) | |||||
| Oct 27, 2021 4:22 pm (GMT -7) (Oct 27, 2021 23:22 GMT) | 1.0 14 km | 94 km (58 mi) | 5km N of Lytle Creek, CA | More | Map |
| Oct 27, 2021 9:26 am (GMT -7) (Oct 27, 2021 16:26 GMT) | ? n/a | 150 km (93 mi) | 3.1 mi northeast of Fullerton, Orange County, California, USA (unconfirmed) I FELT IT - 1 report | More | Map |
| Oct 27, 2021 6:21 am (GMT -7) (Oct 27, 2021 13:21 GMT) | ? n/a | 171 km (106 mi) | 7.1 mi northeast of Van Nuys, Los Angeles County, California, USA (unconfirmed) I FELT IT - 3 reports | More | Map |
| Oct 27, 2021 12:34 am (GMT -7) (Oct 27, 2021 07:34 GMT) | ? n/a | 171 km (106 mi) | 1.7 mi southeast of Koreatown, Los Angeles County, California, USA (unconfirmed) I FELT IT - 1 report | More | Map |
| Oct 26, 2021 7:15 pm (GMT -7) (Oct 27, 2021 02:15 GMT) | 1.3 6 km | 97 km (60 mi) | 3km SE of Lytle Creek, CA | More | Map |
| Oct 26, 2021 6:07 pm (GMT -7) (Oct 27, 2021 01:07 GMT) | ? n/a | 172 km (107 mi) | 3.6 mi southwest of Los Angeles, California, USA (unconfirmed) I FELT IT - 2 reports | More | Map |
| Tuesday, October 26, 2021 21:10 GMT (3 earthquakes) | |||||
| Oct 26, 2021 2:10 pm (GMT -7) (Oct 26, 2021 21:10 GMT) | 0.9 7 km | 139 km (86 mi) | 7km NW of Lakeland Village, CA | More | Map |
| Oct 26, 2021 2:10 pm (GMT -7) (Oct 26, 2021 21:10 GMT) | 1.7 7.5 km | 139 km (86 mi) | 7km NW of Lakeland Village, CA | More | Map |
| Oct 26, 2021 2:50 am (GMT -7) (Oct 26, 2021 09:50 GMT) | ? n/a | 160 km (99 mi) | 1.8 mi east of Garden Grove, Orange County, California, USA (unconfirmed) I FELT IT - 1 report | More | Map |
| Monday, October 25, 2021 20:40 GMT (3 earthquakes) | |||||
| Oct 25, 2021 1:40 pm (GMT -7) (Oct 25, 2021 20:40 GMT) | ? n/a | 107 km (66 mi) | 2.3 mi west of Moreno Valley, Riverside County, California, USA (unconfirmed) I FELT IT - 2 reports | More | Map |
| Oct 25, 2021 4:59 am (GMT -7) (Oct 25, 2021 11:59 GMT) | 1.3 9.5 km | 169 km (105 mi) | 2km WSW of Silver Lake, CA | More | Map |
| Oct 25, 2021 12:55 am (GMT -7) (Oct 25, 2021 07:55 GMT) | 1.2 12 km | 178 km (111 mi) | 4km N of Granada Hills, CA | More | Map |
| Sunday, October 24, 2021 21:27 GMT (9 earthquakes) | |||||
| Oct 24, 2021 2:27 pm (GMT -7) (Oct 24, 2021 21:27 GMT) | 1.6 7.7 km | 101 km (63 mi) | 5km NNE of Fontana, CA | More | Map |
| Oct 24, 2021 7:27 am (GMT -7) (Oct 24, 2021 14:27 GMT) | 1.3 15 km | 169 km (105 mi) | 3km S of Los Angeles, CA | More | Map |
| Oct 24, 2021 7:11 am (GMT -7) (Oct 24, 2021 14:11 GMT) | 1.9 14 km | 165 km (103 mi) | 2km SW of East Los Angeles, CA 5 reports | More | Map |
| Oct 24, 2021 7:06 am (GMT -7) (Oct 24, 2021 14:06 GMT) | 1.2 15 km | 168 km (104 mi) | 3km N of Huntington Park, CA | More | Map |
| Oct 24, 2021 7:01 am (GMT -7) (Oct 24, 2021 14:01 GMT) | 3.6 17 km | 166 km (103 mi) | 1.5 mi west of East Los Angeles, Los Angeles County, California, USA I FELT IT - 793 reports | More | Map |
| Oct 24, 2021 5:48 am (GMT -7) (Oct 24, 2021 12:48 GMT) | 1.2 18 km | 97 km (60 mi) | 2km ESE of Loma Linda, CA | More | Map |
| Oct 23, 2021 11:43 pm (GMT -7) (Oct 24, 2021 06:43 GMT) | 0.9 8.7 km | 95 km (59 mi) | 3km WSW of Redlands, CA | More | Map |
| Oct 23, 2021 6:28 pm (GMT -7) (Oct 24, 2021 01:28 GMT) | 1.3 15 km | 96 km (60 mi) | 2km N of Loma Linda, CA | More | Map |
| Oct 23, 2021 5:02 pm (GMT -7) (Oct 24, 2021 00:02 GMT) | 1.8 9.1 km | 169 km (105 mi) | 12km WSW of Lake Hughes, CA 1 report | More | Map |
| Saturday, October 23, 2021 23:51 GMT (7 earthquakes) | |||||
| Oct 23, 2021 4:51 pm (GMT -7) (Oct 23, 2021 23:51 GMT) | 1.5 8.6 km | 182 km (113 mi) | 1km ENE of Carson, CA | More | Map |
| Oct 23, 2021 2:24 pm (GMT -7) (Oct 23, 2021 21:24 GMT) | 2.0 16 km | 95 km (59 mi) | 3km SW of San Bernardino, CA | More | Map |
| Oct 23, 2021 11:39 am (GMT -7) (Oct 23, 2021 18:39 GMT) | 1.3 11 km | 97 km (60 mi) | 5km WSW of Devore, CA | More | Map |
| Oct 23, 2021 11:37 am (GMT -7) (Oct 23, 2021 18:37 GMT) | 1.8 10.5 km | 97 km (60 mi) | 5km W of Devore, CA | More | Map |
| Oct 23, 2021 11:18 am (GMT -7) (Oct 23, 2021 18:18 GMT) | 1.7 8.2 km | 169 km (105 mi) | 12km WSW of Lake Hughes, CA | More | Map |
| Oct 23, 2021 9:58 am (GMT -7) (Oct 23, 2021 16:58 GMT) | 0.8 10.7 km | 112 km (70 mi) | 6km SSE of Loma Linda, CA | More | Map |
| Oct 22, 2021 10:56 pm (GMT -7) (Oct 23, 2021 05:56 GMT) | 1.1 4 km | 106 km (66 mi) | 4km NW of Fontana, CA | More | Map |
| Friday, October 22, 2021 21:34 GMT (7 earthquakes) | |||||
| Oct 22, 2021 2:34 pm (GMT -7) (Oct 22, 2021 21:34 GMT) | 1.6 14 km | 96 km (60 mi) | 3km E of Loma Linda, CA | More | Map |
| Oct 22, 2021 1:55 pm (GMT -7) (Oct 22, 2021 20:55 GMT) | 1.2 10 km | 116 km (72 mi) | 5km NW of Mira Loma, CA | More | Map |
| Oct 22, 2021 12:11 pm (GMT -7) (Oct 22, 2021 19:11 GMT) | 2.0 0.5 km | 128 km (80 mi) | 5km SSE of Home Gardens, CA | More | Map |
| Oct 22, 2021 12:11 pm (GMT -7) (Oct 22, 2021 19:11 GMT) | 0.8 7.8 km | 109 km (68 mi) | 5km S of Fontana, CA | More | Map |
| Oct 22, 2021 9:17 am (GMT -7) (Oct 22, 2021 16:17 GMT) | 1.7 12 km | 200 km (124 mi) | 2km SE of Simi Valley, CA | More | Map |
| Oct 22, 2021 4:06 am (GMT -7) (Oct 22, 2021 11:06 GMT) | 1.2 6.7 km | 181 km (112 mi) | 3km E of Carson, CA | More | Map |
| Oct 22, 2021 12:41 am (GMT -7) (Oct 22, 2021 07:41 GMT) | ? n/a | 138 km (86 mi) | 3 mi west of Laguna, Riverside County, California, USA (unconfirmed) I FELT IT - 2 reports | More | Map |
| Thursday, October 21, 2021 23:14 GMT (4 earthquakes) | |||||
| Oct 21, 2021 4:14 pm (GMT -7) (Oct 21, 2021 23:14 GMT) | ? n/a | 173 km (107 mi) | 2.5 mi southwest of Laguna Niguel, Orange County, California, USA (unconfirmed) I FELT IT - 2 reports | More | Map |
| Oct 21, 2021 1:22 pm (GMT -7) (Oct 21, 2021 20:22 GMT) | 0.8 4.2 km | 107 km (66 mi) | 4km WNW of Fontana, CA | More | Map |
| Oct 21, 2021 9:14 am (GMT -7) (Oct 21, 2021 16:14 GMT) | 0.7 3 km | 99 km (62 mi) | 5km SE of Loma Linda, CA | More | Map |
| Oct 21, 2021 8:40 am (GMT -7) (Oct 21, 2021 15:40 GMT) | 1.1 9.2 km | 110 km (68 mi) | 8km NNW of Rancho Cucamonga, CA | More | Map |
Estimated combined seismic energy released: 1.6 x 1010 joules (4.52 megawatt hours, equivalent to 3.89 tons of TNT) More info
