Has seismic activity increased or decreased? Find out below! Check seismic activity worldwide, near you or in your favorite areas.

Quakes and stats within 500 km (311 mi) of 41.2°N/122.1°W past 3 days

DOWN by 39%
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Color of quakes reflects depth (red=shallow to blue=deep).
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The total number of quakes above magnitude 2 that occurred during the 3 days in the marked area was 14, 39% less than normally. This is compared to the average number (Ø) of 22.9 quakes obtained from the 100 preceding 3 days intervals with a standard mean deviation (σ) of 22.4 (which is a measure of the typical amount of variation, or spread, of quake numbers during such a time interval).
Interpretation: There is no significant variation in the number of quakes that occurred during the past 3 days.
MagTotal #ØσObs. deviation
6+000.1-0-100% (-0.1σ)
5+000.2-0-100% (-0.2σ)
4+10.40.8+0.6+178% (+0.8σ)
3+02.33.3-2.3-100% (-0.7σ)
2+1320.119.1-7.1-35% (-0.4σ)
All1422.922.4-8.9-39% (-0.4σ)
BLACK = Number of quakes within normal statistical range
RED = Significantly lower than normal number of quakes
GREEN = Significantly higher than normal number of quakes

Latest confirmed earthquakes in the marked area past 3 days

Filter by magnitude:
Showing recent quakes magnitude 2 or higher (14).
Date and time Mag
Location Details
9 Dec 2021 06:00:33 GMT
(2 hours and 27 minutes ago

15 km
42km W of Petrolia, CA [Show on map]More
9 Dec 2021 04:28:34 GMT
(4 hours ago

10.6 km
14km SE of Petrolia, CA [Show on map]More
8 Dec 2021 17:21:50 GMT
(15 hours ago

15 km
1km ESE of Pacheco, CA 1 report [Show on map]More
8 Dec 2021 15:01:00 GMT
(17 hours ago

8.6 km
6km WSW of Colma, CA [Show on map]More
8 Dec 2021 03:04:40 GMT
(1 day 5 hours ago

27 km
76km W of Petrolia, CA
I FELT IT - 2 reports [Show on map]
7 Dec 2021 21:06:42 GMT
(1 day 11 hours ago

12 km
7 Dec 2021 16:22:49 GMT
(1 day 16 hours ago

8.3 km
7 Dec 2021 09:30:20 GMT
(1 day 23 hours ago

10.9 km
30 Km SSE of Mina, Nevada [Show on map]More
7 Dec 2021 09:02:18 GMT
(1 day 23 hours ago

10.8 km
30 Km SSE of Mina, Nevada [Show on map]More
7 Dec 2021 08:30:25 GMT
(1 day 24 hours ago

11 km
Nevada [Show on map]More
7 Dec 2021 07:05:07 GMT
(2 days ago

4.1 km
96km W of Petrolia, CA
I FELT IT [Show on map]
7 Dec 2021 06:29:11 GMT
(2 days ago

4.2 km
5km W of Walker, CA
I FELT IT - 1 report [Show on map]
7 Dec 2021 01:04:15 GMT
(2 days ago

1.1 km
2km E of The Geysers, CA [Show on map]More
6 Dec 2021 12:46:01 GMT
(3 days ago

4.6 km
12km S of Yosemite Lakes, CA [Show on map]More
Estimated combined seismic energy released: 6.9 x 1010 joules (19.1 megawatt hours, equivalent to 16.5 tons of TNT) More info

Current seismic activity level

Current Seismic Activity Level
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