Minor mag. 1.2 earthquake - 3km W of San Clemente, CA, on Monday, Sep 20, 2021 1:35 am (GMT -7) -

Minor mag. 1.2 earthquake - 3km W of San Clemente, CA, on Monday, Sep 20, 2021 1:35 am (GMT -7)

Minor magnitude 1.2 earthquake at 18 km depth

20 Sep 08:38 UTC: First to report: USGS after 3 minutes.
20 Sep 08:39: Hypocenter depth recalculated from 13.9 to 16.8 km (from 8.6 to 10.4 mi). Epicenter location corrected by 1.5 km (0.9 mi) towards N.
20 Sep 23:14: Magnitude recalculated from 1.4 to 1.2. Hypocenter depth recalculated from 16.8 to 17.8 km (from 10.4 to 11.1 mi). Epicenter location corrected by 0.6 km (0.4 mi) towards SSW.
Date & time: Sep 20, 2021 08:35:42 UTC -
Local time at epicenter: Monday, Sep 20, 2021 1:35 am (GMT -7)
Magnitude: 1.2
Depth: 17.8 km
Epicenter latitude / longitude: 33.43667°N / 117.64383°W (California, United States)
Antipode: 33.437°S / 62.356°E
Nearest volcano: Lavic Lake (173 km / 107 mi)
Nearby towns and cities:
3 km (2 mi) WNW of San Clemente (pop: 65,500) --> See nearby quakes!
6 km (4 mi) ESE of Dana Point (pop: 34,200) --> See nearby quakes!
7 km (5 mi) SSE of San Juan Capistrano (pop: 36,500) --> See nearby quakes!
11 km (7 mi) SSE of Laguna Niguel (pop: 65,800) --> See nearby quakes!
16 km (10 mi) SSE of Aliso Viejo (pop: 50,200) --> See nearby quakes!
18 km (11 mi) S of Mission Viejo (pop: 97,200) --> See nearby quakes!
23 km (14 mi) S of Rancho Santa Margarita (pop: 49,300) --> See nearby quakes!
24 km (15 mi) S of Lake Forest (pop: 82,500) --> See nearby quakes!
62 km (39 mi) SE of Long Beach (pop: 474,100) --> See nearby quakes!
88 km (55 mi) SE of Los Angeles (pop: 3,971,900) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 16.5°C (62 F), humidity: 91%, wind: 0 m/s (1 kts) from NNE
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 4 x 106 joules (1.11 kilowatt hours) More info
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Data for the same earthquake reported by different agencies

Info: The more agencies report about the same quake and post similar data, the more confidence you can have in the data. It takes normally up to a few hours until earthquake parameters are calculated with near-optimum precision.
Mag.DepthLocationSource
1.218 km3km W of San Clemente, CAUSGS

User reports for this quake (1)

At magnitude 1.2, such a quake wouldn't normally be felt by people, but could be recorded instrumentally.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Azusa ca / Very weak shaking (MMI II) / 2-5 s
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