Weak mag. 2.9 earthquake - 5.5 mi north of Rancho Cucamonga, San Bernardino County, California, USA, on Sunday, 28 Feb 2021 10:17 pm (GMT -8) -

Weak mag. 2.9 earthquake - 5.5 mi north of Rancho Cucamonga, San Bernardino County, California, USA, on Sunday, 28 Feb 2021 10:17 pm (GMT -8)

Weak magnitude 2.9 earthquake at 9 km depth

1 Mar 06:19 UTC: First to report: USGS after 2 minutes.
1 Mar 17:00: Magnitude recalculated from 3.0 to 2.9. Hypocenter depth recalculated from 9.3 to 9.2 km (from 5.8 to 5.7 mi).
Update Mon, 1 Mar 2021, 06:24
Small magnitude 3.0 quake hits 6 miles northeast of Rancho Cucamonga, California, United States late at night
3.0 quake 28 Feb 10:17 pm (GMT -8)
3.0 quake 28 Feb 10:17 pm (GMT -8)
A very shallow magnitude 3.0 earthquake was reported late at night near Rancho Cucamonga, San Bernardino County, California, USA.
According to the United States Geological Survey, the quake hit on Sunday 28 February 2021 at 10:17 pm local time at a very shallow depth of 5.8 miles. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 3.0 earthquake as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Rancho Cucamonga (pop. 175,200) located 6 miles from the epicenter, Upland (pop. 76,400) 8 miles away, Fontana (pop. 207,500) 9 miles away, Ontario (pop. 171,200) 10 miles away, Rialto (pop. 103,100) 12 miles away, Chino (pop. 85,600) 14 miles away, Pomona (pop. 153,300) 14 miles away, and San Bernardino (pop. 216,100) 16 miles away. In Los Angeles (pop. 3,971,900, 40 miles away), the quake was probably not felt.
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Earthquake data:

Date & time: 1 Mar 2021 06:17:09 UTC -
Local time at epicenter: Sunday, 28 Feb 2021 10:17 pm (GMT -8)
Magnitude: 2.9
Depth: 9.2 km
Epicenter latitude / longitude: 34.18033°N / 117.559°W (San Bernardino, California, United States)
Nearest volcano: Lavic Lake (106 km / 66 mi)
Nearby towns and cities:
9 km (5 mi) NNE of Rancho Cucamonga (pop: 175,200) --> See nearby quakes!
12 km (8 mi) NE of Upland (pop: 76,400) --> See nearby quakes!
15 km (9 mi) NW of Fontana (pop: 207,500) --> See nearby quakes!
16 km (10 mi) NNE of Ontario (pop: 171,200) --> See nearby quakes!
17 km (10 mi) NE of Montclair (pop: 38,700) --> See nearby quakes!
17 km (11 mi) ENE of Claremont (Los Angeles County) (pop: 36,300) --> See nearby quakes!
19 km (12 mi) WNW of Rialto (pop: 103,100) --> See nearby quakes!
23 km (14 mi) NE of Pomona (pop: 153,300) --> See nearby quakes!
50 km (31 mi) NE of Anaheim (pop: 350,700) --> See nearby quakes!
603 km (375 mi) SE of Sacramento (pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 10.7°C (51 F), humidity: 16%, wind: 3 m/s (6 kts) from NW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 1.4 x 109 joules (392 kilowatt hours, equivalent to 0.338 tons of TNT) More info
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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.
Mag.DepthLocationSource
2.99.2 km7km NNE of Rancho Cucamonga, CA, USAUSGS
3.09 kmGREATER LOS ANGELES AREA, CALIF., USAEMSC

User reports for this quake (74)

At magnitude 2.9, this quake might have been felt very close to the epicenter and under calm conditions.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Springville, CA / Very weak shaking (MMI II) / vibration and rolling / very short : House roof popped and cracked. I felt it under my feet. I'm sensitive to feeling even mild earthquakes. | One user found this interesting.  
Rancho Cucamonga, California / Moderate shaking (MMI V) : Quick blast or jolt. Not really any shaking | One user found this interesting.  
Norco, CA / Light shaking (MMI IV) / single lateral shake / 1-2 s : About 10:18 pm...short jolt walls and foundation jolted | One user found this interesting.  
Eastvale ca / Very weak shaking (MMI II) : Just heard it more than felt it | One user found this interesting.  
Mira Loma, Riverside, California (21.3 km SSE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake : Felt long  
Mira Loma, Riverside, California (21.3 km SSE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake : Felt long  
Rancho Cucamonga, San Bernardino, California (7.8 km S of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Rancho Cucamonga, San Bernardino, California (11.1 km S of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s
Fontana, San Bernardino, California (10.8 km SE of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s
Rancho Cucamonga, San Bernardino, California (6.1 km SSE of epicenter) [Map] / Very weak shaking (MMI II) / very short
Rancho Cucamonga, San Bernardino, California (7.8 km S of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Mira Loma, Riverside, California (21.3 km SSE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake : Felt long  
Upland, San Bernardino, California (11.8 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
Rancho Cucamonga / Moderate shaking (MMI V) / single vertical bump / very short
Fontana / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Rancho Cucamonga / Very weak shaking (MMI II) / rattling, vibrating / very short : Heard the walls shake not too much actual movement at all. Chandelier did not pick up any movements either.  
Rancho Cucamonga, Home / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
La Habra (46.8 km SW of epicenter) [Map] / not felt (reported through our app)
4.9 km ENE of epicenter [Map] / Very weak shaking (MMI II) / single vertical bump / very short : Just a jolt and a boom, heard the quake as well as felt it.  
Jurupa Valley / Very weak shaking (MMI II) / very short : Felt it, and heard the rumble  
Rancho Cucamonga / Very weak shaking (MMI II)
Rancho Cucamonga / Weak shaking (MMI III) / 1-2 s
Rancho Cucamonga / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Corona ca / Weak shaking (MMI III) / rattling, vibrating / very short
Ontario, Ca / Very weak shaking (MMI II) / rattling, vibrating / very short
Ontario / Very weak shaking (MMI II)
Rancho Cucamonga / Light shaking (MMI IV)
91739 (7.2 km SSE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Church and Haven, rancho Cucamonga / Very weak shaking (MMI II) / single vertical bump / very short : Church and Haven, rancho Cucamonga  
Riverside / Very weak shaking (MMI II) / single vertical bump / 1-2 s : I was lieing down on my couch.  
Bloomington / Very weak shaking (MMI II) / rattling, vibrating / 5-10 s
Rancho Cucamonga, CA / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Rancho Cucamonga / Very weak shaking (MMI II) / single vertical bump / very short
Etiwanda / Light shaking (MMI IV) / single vertical bump / 2-5 s : Quick jolt  
Fontana / Very weak shaking (MMI II) / single vertical bump / very short : Felt like a quick hit not a shake more like a hit to the house  
Ontario / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Slight shake - sitting in recliner. Thought my husband bumped my seat.  
Rancho Cucamonga,CA / Very weak shaking (MMI II) / 2-5 s : Sounded like a truck rumbling down the street. Very little shaking. More heard than felt.  
North Fontana / Light shaking (MMI IV) / rattling, vibrating / very short
91730 / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
Rancho Cucamonga, Home / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
Upland / Very weak shaking (MMI II) / very short
Riverside, CA / Light shaking (MMI IV) / rattling, vibrating / 5-10 s
Upland, California / Moderate shaking (MMI V) / single lateral shake / very short : I felt it, short, kind of strong  
Colton, CA / Very weak shaking (MMI II) / very short
Rancho Cucamonga / Very weak shaking (MMI II)
rancho cucamonga (0.2 km E of epicenter) [Map] / Very weak shaking (MMI II) : only shook the house for less than a second  
Fontana / Very weak shaking (MMI II) / very short : It was a quick hard jolt  
Rialto / Very weak shaking (MMI II) / rattling, vibrating / very short : The whole house just vibrates but felt like a tap. But anyone could easily not feel it but I did.  
91764 / Very weak shaking (MMI II) / very short
Fontana / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Riverside, CA (39 km SE of epicenter) [Map] / Light shaking (MMI IV)
Rancho Cucamonga / Very weak shaking (MMI II) / single vertical bump / 1-2 s
Rancho Cucamonga / Very weak shaking (MMI II) / single lateral shake
Fontana / Light shaking (MMI IV) / rattling, vibrating / very short
Apple Valley / Very weak shaking (MMI II) / single lateral shake / 1-2 s
Upland, CA / Light shaking (MMI IV) / rattling, vibrating / very short
92336 / Weak shaking (MMI III) / single vertical bump / very short
Fontana / Light shaking (MMI IV) / single lateral shake / very short
Alta Loma / Moderate shaking (MMI V) / rattling, vibrating / 1-2 s
Jurupa Valley / Very weak shaking (MMI II) / very short
Rancho Cucamonga / Light shaking (MMI IV) / single vertical bump / 1-2 s
Fontana / Very weak shaking (MMI II) / rattling, vibrating / very short
7154 bodega st Fontana ca / Very weak shaking (MMI II) / single lateral shake / very short : Felt very subtle shake  
Ontario, CA / Very weak shaking (MMI II) / very short
ontario CA / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Ontario CA  
Fontana / Light shaking (MMI IV) : Felt like a car hit the house I was staying in  
92508 / Very weak shaking (MMI II) / 10-15 s
Rancho Cucamonga / not felt / single lateral shake / very short : It was a quick jolt  
Fontana / Moderate shaking (MMI V) / 1-2 s
Jurupa valley,Ca / Light shaking (MMI IV)
Colton / Very weak shaking (MMI II) / horizontal (sideways) swinging / 1-2 s
Rancho Cucamonga / Moderate shaking (MMI V) / single vertical bump / very short
Riverside / not felt / rattling, vibrating / very short
Perris California / Very weak shaking (MMI II) / 2-5 s
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