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Μέτριος σεισμός μεγέθους 3.9 - 44 km βόρεια από Ukiah, Mendocino County, Καλιφόρνια, Ηνωμένες Πολιτείες, Παρ, 23 Απρ 2021 11:18 GMT -

Μέτριος σεισμός μεγέθους 3.9 - 44 km βόρεια από Ukiah, Mendocino County, Καλιφόρνια, Ηνωμένες Πολιτείες, Παρ, 23 Απρ 2021 11:18 GMT Μέτριος σεισμός μεγέθους 3.9 - 44 km βόρεια από Ukiah, Mendocino County, Καλιφόρνια, Ηνωμένες Πολιτείες, Παρ, 23 Απρ 2021 11:18 GMT

Μέτριος σεισμός μεγέθους 3.9 σε βάθος 7.4 χλμ

23 Apr 11:22 UTC: Πρώτα να αναφέρει: USGS after 4 λεπτά.
23 Apr 11:24: Magnitude recalculated from 3.7 to 4.0.
23 Apr 14:02: Magnitude recalculated from 4.0 to 3.9.
23 Apr 18:00: Hypocenter depth recalculated from 6.6 to 7.4 km (from 4.1 to 4.6 mi).
Update Fri, 23 Apr 2021, 11:27
Moderate magnitude 4.0 quake hits 28 miles northeast of Ukiah, California, United States early morning
4.0 quake 23 Apr 4:18 am (GMT -7)
4.0 quake 23 Apr 4:18 am (GMT -7)
The United States Geological Survey reported a magnitude 4.0 quake in the United States near Ukiah, Mendocino County, California, only 8 minutes ago. The earthquake hit early morning on Friday 23 April 2021 at 4:18 am local time at a very shallow depth of 4.1 miles. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 4.0 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Potter Valley (pop. 650) located 15 miles from the epicenter, Willits (pop. 4,900) 19 miles away, Brooktrails (pop. 3,200) 19 miles away, and Redwood Valley (pop. 1,700) 20 miles away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Covelo (pop. 1,300) located 22 miles from the epicenter, Ukiah (pop. 15,900) 28 miles away, Nice (pop. 2,700) 30 miles away, and Clearlake (pop. 15,200) 45 miles away.

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Earthquake data

Ημερομηνία & time: 23 Apr 2021 11:18:40 UTC -
Τοπική ώρα στο επίκεντρο: 23 Apr 4:18 am (GMT -7)
Μέγεθος: 3.9
Βάθος: 7.4 km
Επίκεντρο γεωγραφικό πλάτος / γεωγραφικό μήκος: 39.52567°N / 123.0365°W (Mendocino, Καλιφόρνια, Ηνωμένες Πολιτείες)
Antipode: 39.526°S / 56.964°E
Πλησιέστερα ηφαίστειο: Clear Lake (66 km / 41 mi)
Nearby towns and cities:
24 km (15 mi) ΒΑ of Potter Valley (pop: 646) --> Δείτε κοντινούς σεισμούς!
30 km (19 mi) ΒΑ of Little Lake (pop: 4,860) --> Δείτε κοντινούς σεισμούς!
32 km (20 mi) ΒΑ of Redwood Valley (pop: 1,730) --> Δείτε κοντινούς σεισμούς!
35 km (22 mi) ΝΑ of Covelo (pop: 1,260) --> Δείτε κοντινούς σεισμούς!
42 km (26 mi) ΝΑ of Laytonville (pop: 1,230) --> Δείτε κοντινούς σεισμούς!
44 km (28 mi) ΒΑ of Ukiah (pop: 15,900) --> Δείτε κοντινούς σεισμούς!
50 km (31 mi) ΒΔ of North Lakeport (pop: 3,310) --> Δείτε κοντινούς σεισμούς!
67 km (41 mi) Α of Fort Bragg (Mendocino County) (pop: 7,290) --> Δείτε κοντινούς σεισμούς!
72 km (45 mi) ΒΔ of Clearlake (Lake County) (pop: 15,200) --> Δείτε κοντινούς σεισμούς!
170 km (105 mi) ΒΔ of Σακραμέντο (pop: 490,700) --> Δείτε κοντινούς σεισμούς!
Weather at epicenter at time of quake:
Broken Clouds 5.9°C (43 F), humidity: 81%, wind: 2 m/s (3 kts) from NE
Κύρια πηγή δεδομένων: USGS (United States Geological Survey)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, ισοδυναμεί με 10.7 τόνους TNT) | about seismic energy
Διαδραστικός χάρτης
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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.
3.97.4 km15km NNW of Lake Pillsbury, CA, USAUSGS

User reports for this quake (6)

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!
San Jose, California 95148 / Light shaking (MMI IV) / single lateral shake / 2-5 s : Woke me up from sleep, a bag of items on top of another bag of items fell over. Then the wall behind me seemed to be jolted once northeasterly, creaked, rumbled and stopped. From jolt to stop was 2 seconds tops.  
Orange, CA / Light shaking (MMI IV) / single lateral shake / 5-10 s
Nas Lemoore (455.8 km SE of epicenter) [Map] / Very weak shaking (MMI II) / horizontal (sideways) swinging / 5-10 s
San Jose / Very weak shaking (MMI II) / single vertical bump / 1-2 s
5726 Ridgewood Road Willits, CA (27.6 km SW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : Woke up to house shaking.  
93041 / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
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