Mag. 3.8 earthquake - 5km E of Westmorland, CA, USA, on Thursday, 1 October 2020 at 00:33 (GMT) -

Mag. 3.8 earthquake  - 5km E of Westmorland, CA, USA, on Thursday, 1 October 2020 at 00:33 (GMT)

Minor magnitude 3.8 earthquake at 3 km depth

1 Oct 00:36 UTC: First to report: USGS after 2 minutes.
1 Oct 18:02: Magnitude recalculated from 3.7 to 3.9. Hypocenter depth recalculated from 8.2 to 5.9 km (from 5.1 to 3.7 mi). Epicenter location corrected by 1.9 km (1.2 mi) towards WNW.
1 Oct 18:46: Magnitude recalculated from 3.9 to 3.8. Hypocenter depth recalculated from 5.9 to 3.0 km (from 3.7 to 1.9 mi). Epicenter location corrected by 11.2 km (6.9 mi) towards WSW.
Date & time: 1 Oct 2020 12:33:59 UTC -
Magnitude: 3.8
Depth: 3.0 km
Epicenter latitude / longitude: 33.0165°N / 115.704°W (California, United States)
Nearest volcano: Salton Buttes (19 km / 12 mi)
Nearby towns and cities:
8 km (5 mi) WSW of Westmorland (Imperial County) (pop: 2,270)
17 km (10 mi) WNW of Brawley (Imperial County) (pop: 25,900)
21 km (13 mi) SW of Calipatria (Imperial County) (pop: 7,420)
25 km (15 mi) N of Seeley (Imperial County) (pop: 1,740)
28 km (18 mi) NNW of El Centro (Imperial County) (pop: 44,000)
42 km (26 mi) NNW of Calexico (Imperial County) (pop: 40,100)
134 km (83 mi) ENE of Tijuana (Baja California, Mexico) (pop: 1,301,000)
810 km (503 mi) SE of Sacramento (pop: 490,700)
Weather at epicenter at time of quake:
Clear Sky 41°C (106 F), humidity: 9%, wind: 2 m/s (3 kts) from N
Primary data source: USGS
Estimated released energy: 3.2 x 1010 joules (8.78 megawatt hours, equivalent to 7.56 tons of TNT) [learn more]
[smaller] [bigger]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
M 3.83 km5km E of Westmorland, CA, USAUSGS
M 3.810 kmSouthern California, USAEMSC

User reports for this quake (11)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
Flag as inappropriate.
Mark as helpful or interesting.
Send your own user report!
72.8 km SW of epicenter [Map] / not felt (reported through our app)
Carlsbad (United States, 164 km W of epicenter) : Pretty good jerking back-and-forth felt like it came from the east east to west Movement (reported through EMSC)
Lake San Marcos (United States, 151 km W of epicenter) : Slight short shake. (reported through EMSC)
Sorrento Valley (United States, 150 km W of epicenter) : It was a light shake in San Diego (sorrento valley) for about 3 seconds. I saw my lightweight house plant shake a bit. (reported through EMSC)
Sorrento Valley (United States, 150 km W of epicenter) (reported through EMSC)
Tijuana (Mexico, 144 km SW of epicenter) : Muy leve en tijuana (reported through EMSC)
La Paz Valley (United States, 140 km NE of epicenter) : Light shaking nothing dramatic. (reported through EMSC)
Fortuna Foothills (United States, 119 km E of epicenter) : A soft but unmistakable jolt, then a rocking roll for about 5 seconds. Nothing fell, just swung. I'm in Yuma AZ (reported through EMSC)
Somerton (United States, 96 km SE of epicenter) : Felt in Somerton, Arizona significant movement (reported through EMSC)
Calexico (United States, 40 km S of epicenter) : It was shaking pretty good (reported through EMSC)
Brawley (United States, 9 km SE of epicenter) : Big long shake. (reported through EMSC)
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area since 1900

Mag. 3.8 earthquake - 5km E of Westmorland, CA, USA, on Thursday, 1 October 2020 at 00:33 (GMT)

Map of earlier quakes

Volcanoes & Earthquakes - new app for Android

More on VolcanoDiscovery

Why is there advertising on this site?

Support us!

Maintaining the website and our free apps is a time- and cost-intensive effort.
If you find the information useful and would like to support our team to develop further features and get the upgraded ad-free version, consider making a donation (PayPal or Online cc payment).
Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
Thanks to your past donations, these features have been added recently:
  • Earthquake archive back to 1900
  • Additional data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Copyrights: VolcanoDiscovery and other sources as noted.
Use of material: Most texts and images, in particular photographs, on this website are protected by copyright. Further reproduction and use of without authorization is usually not consented. If you are not sure or need licensing rights for photographs, for example for publications and commercial use, please contact us.