Mag. 3.5 earthquake - Napa County, 7.9 mi east of Angwin, California, USA, on Monday, 26 October 2020 at 13:38 (GMT) -

Mag. 3.5 earthquake  - Napa County, 7.9 mi east of Angwin, California, USA, on Monday, 26 October 2020 at 13:38 (GMT)

Minor magnitude 3.5 earthquake at 9 km depth

26 Oct 13:41 UTC: First to report: USGS after 3 minutes.
26 Oct 17:56: Magnitude recalculated from 3.6 to 3.4. Hypocenter depth recalculated from 7.2 to 9.4 km (from 4.5 to 5.8 mi). Epicenter location corrected by 1.3 km (0.8 mi) towards WSW.
26 Oct 21:18: Magnitude recalculated from 3.4 to 3.5.
Date & time: 26 Oct 2020 13:38:36 UTC -
Magnitude: 3.5
Depth: 9.4 km
Epicenter latitude / longitude: 38.5575°N / 122.306°W (Napa County, California, United States)
Nearest volcano: Clear Lake (62 km / 39 mi)
Nearby towns and cities:
13 km (8 mi) E of Angwin (pop: 3,050) --> See nearby quakes!
15 km (9 mi) NE of Rutherford (pop: 164) --> See nearby quakes!
24 km (15 mi) E of Calistoga (Napa County) (pop: 5,330) --> See nearby quakes!
29 km (18 mi) N of Napa (pop: 80,400) --> See nearby quakes!
29 km (18 mi) W of Winters (pop: 7,030) --> See nearby quakes!
36 km (22 mi) NW of Vacaville (pop: 96,800) --> See nearby quakes!
38 km (24 mi) ENE of Santa Rosa (pop: 175,000) --> See nearby quakes!
41 km (26 mi) NW of Fairfield (pop: 113,000) --> See nearby quakes!
3887 km (2415 mi) WNW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
3887 km (2415 mi) WNW of Washington DC (District of Columbia) (pop: 601,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 9.5°C (49 F), humidity: 20%, wind: 5 m/s (10 kts) from N
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.1 x 1010 joules (3.12 megawatt hours, equivalent to 2.68 tons of TNT) More info
[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.
MagnitudeDepthLocationSource
M 3.59.4 km13km E of Angwin, CA, USAUSGS
M 3.210 kmNorthern California, USAEMSC

User reports for this quake (6)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
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!
Yountville, CA / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : I was up reading when the house shook and glass doors in the shower rattled. The house moved enough it woke my wife from sleep. | 7 users found this interesting.
Lakeport, CA / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : I rolled to the floor in fear and panic! my wife said I was whimpering and that it was disturbing her. She then knelt down and slapped me and said, "You know what that one was for!". | 5 users found this interesting.
Lakeport, CA / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : I rolled to the floor and covered the back of my head. I was whimpering maybe crying just, a little. My wife reached down into both my nose holes with her ring and pinky finger, jammed in and pulled me up to my knees and slapped me (she slaps hard!)! She told me "you know what that was for" and pointed to the bed as direction for me to follow.
4038 E.3rd Avenue, Napa, Ca 94558 / Light shaking (MMI IV) / very short : We were awake due to a wind storm but have experienced enough earthquakes that it is very different than wind. A quick jerky feeling of the house timbers right down the the foundation, Was in the upstairs bedroom.
Napa (12.8 km ESE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / very short
Saint Helena (United States, 27 km W of epicenter) : Brief jolt. Clearly an earthquake but short. | One user found this interesting. (reported through EMSC)
Volcanoes & Earthquakes - new app for Android

Earlier earthquakes in the same area

Mag. 3.5 earthquake - Napa County, 7.9 mi east of Angwin, California, USA, on Monday, 26 October 2020 at 13:38 (GMT)
Volcanoes & Earthquakes - new app for Android
Why is there advertising on this site?

Support us - Help us upgrade our server!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
Our server is reaching its limits and we need financing to increase capacity in order to deal with huge activity peaks when quakes occur. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every penny counts and every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features and in upgrading our software, please make a donation (PayPal or Online cc payment).

Planned features:
  • Weather reports
  • Tsunami alerts
  • Design upgrades
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Earthquake archive from 1900 onwards
  • Additional seismic data sources
  • Improved content in English
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you! With best regards from the VolcanoDiscovery team.
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.