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Minor mag. 2.3 earthquake - 3km ENE of San Ramon, CA, USA on Monday, 12 October 2020

Minor mag. 2.3 earthquake  - 3km ENE of San Ramon, CA, USA on Monday, 12 October 2020
12 Oct 01:18 UTC: First to report: USGS after 2 minutes.
Date & time: Monday, 12 October 2020 01:16 UTC
Local time at epicenter: 11 Oct 6:16 pm (GMT -7)
Magnitude: 2.3
Depth: 10.9 km
Epicenter latitude / longitude: 37.79183°N / 121.94617°W (California, United States)
Nearest volcano: Clear Lake (149 km / 93 mi)
Nearby towns and cities:
3 km (2 mi) NE of San Ramon (pop: 76,100)
5 km (3 mi) SW of Blackhawk (pop: 9,400)
5 km (3 mi) SE of Diablo (pop: 1,200)
42 km (26 mi) E of San Francisco (pop: 864,800)
51 km (31 mi) N of San Jose (pop: 1,026,900)
96 km (60 mi) SW of Sacramento (pop: 490,700)
Weather at epicenter at time of quake:
Clear Sky 23.7°C (75 F), humidity: 15%, wind: 3 m/s (6 kts) from NNE
Primary data source: USGS
Estimated released energy: 1.8 x 108 joules (49.4 kilowatt hours) [learn more]
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.
TimeMag. / DepthLocationSource
11 Oct 6:16 pm (GMT -7) (12 Oct 01:16:40 UTC)M 2.3 / 10.9 km3km ENE of San Ramon, CA, USAUSGS
Mon, 12 Oct 01:16 UTCM 2.3 / 11 kmSan Francisco Bay Area, Calif., USAEMSC

User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
At magnitude 2.3, this quake was probably too small to be felt by humans, but it could be recorded instrumentally.
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!
Oakland ca / Very weak shaking (MMI II) : Sort of a crack sound , I had been resting half asleep that startled me, and possibly weak shaking but I jumped up immediately and ran for door | One user found this interesting.
Redwood City / Weak shaking (MMI III) / vibration and rolling / 10-15 s

Earlier earthquakes in the same area

Minor mag. 2.3 earthquake - 3km ENE of San Ramon, CA, USA on Monday, 12 October 2020

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