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Minor mag. 2.7 earthquake - 7km N of Boulder Creek, CA, USA on Sunday, 11 October 2020

Minor mag. 2.7 earthquake  - 7km N of Boulder Creek, CA, USA on Sunday, 11 October 2020
11 Oct 16:39 UTC: First to report: EMSC after 2 minutes.
11 Oct 16:39: Now using data updates from USGS
Date & time: Sunday, 11 October 2020 16:36 UTC
Local time at epicenter: 11 Oct 9:36 am (GMT -7)
Magnitude: 2.7
Depth: 7.6 km
Epicenter latitude / longitude: 37.18783°N / 122.12083°W (United States)
Nearest volcano: Clear Lake (206 km / 128 mi)
Nearby towns and cities:
7 km (4 mi) N of Boulder Creek (pop: 4,900)
9 km (6 mi) N of Brookdale (pop: 2,000)
11 km (7 mi) NW of Lompico (pop: 1,100)
26 km (16 mi) SW of San Jose (pop: 1,026,900)
70 km (44 mi) SE of San Francisco (pop: 864,800)
164 km (102 mi) SW of Sacramento (pop: 490,700)
Weather at epicenter at time of quake:
Few Clouds 16.1°C (61 F), humidity: 69%, wind: 2 m/s (4 kts) from NNW
Primary data source: USGS
Estimated released energy: 7.1 x 108 joules (197 kilowatt hours, equivalent to 0.169 tons of TNT) [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 9:36 am (GMT -7) (11 Oct 16:36:46 UTC)M 2.7 / 7.6 km7km N of Boulder Creek, CA, USAUSGS
Sun, 11 Oct 16:36 UTCM 2.7 / 8 kmNorthern California, USAEMSC

User reports for this quake (8)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
At magnitude 2.7, this quake might have been felt very close to the epicenter and under calm conditions.
Contribute:
Leave a comment if you find a particular report interesting or want to add to it.
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Send your own user report!
San Ramon (68 km NNE of epicenter) [Map] / Very weak shaking (MMI II) / 2-5 s
Boulder Creek / Light shaking (MMI IV) : Like a short jolt with a booming sound. Very quick but felt stronger than 2.7.
Boulder Creek / Weak shaking (MMI III) / single vertical bump / 2-5 s : It just felt like a tree fell. Quick jolt
Boulder Creek / Weak shaking (MMI III) / single vertical bump / 2-5 s : It just felt like a tree fell. Quick jolt
Boulder creek, ca / Light shaking (MMI IV) / 1-2 s
Boulder Creek / Moderate shaking (MMI V) / single vertical bump / very short : A single Hard Jolt, shortest ever but definitely felt like more than 2.7
Boulder Creek / Weak shaking (MMI III) / 1-2 s
Boulder Creek / Very weak shaking (MMI II) / single lateral shake / very short : One quick jolt not big but house moved heard the house creak

Earlier earthquakes in the same area since 1900

Minor mag. 2.7 earthquake - 7km N of Boulder Creek, CA, USA on Sunday, 11 October 2020

Map of earlier quakes

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