Weak mag. 3.1 earthquake - 0.9 mi northwest of Hemet, Riverside County, California, USA, on Wednesday, Aug 4, 2021 11:51 pm (GMT -7) -

Weak mag. 3.1 earthquake - 0.9 mi northwest of Hemet, Riverside County, California, USA, on Wednesday, Aug 4, 2021 11:51 pm (GMT -7)

Weak magnitude 3.1 earthquake at 17 km depth

5 Aug 06:23 UTC: First to report: VolcanoDiscovery after 30 seconds.
6 Aug 06:19: Now using data updates from USGS
Update Thu, 5 Aug 2021, 06:57
Small tremor of magnitude 3.5 just reported 1 miles northwest of Hemet, California, United States
3.5 quake 4 Aug 11:51 pm (GMT -7)
3.5 quake 4 Aug 11:51 pm (GMT -7)
Just 6 minutes ago, a 3.5-magnitude earthquake struck near Hemet, Riverside County, California, USA. The tremor was recorded late at night on Wednesday 4 August 2021 at 11:51 pm local time, at a shallow depth of 11 miles below the surface.
The event was filed by the United States Geological Survey, the first seismological agency to report it.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.5 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Hemet (pop. 83,900) located 1 miles from the epicenter, San Jacinto (pop. 47,000) 2 miles away, East Hemet (pop. 17,400) 3 miles away, Menifee (pop. 87,200) 10 miles away, Beaumont (pop. 43,800) 12 miles away, Perris (pop. 75,000) 14 miles away, Moreno Valley (pop. 204,200) 19 miles away, and Murrieta (pop. 109,800) 19 miles away. In Anaheim (pop. 350,700, 54 miles away), the quake was probably not felt.

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Earthquake data

Date & time: Aug 5, 2021 06:51:30 UTC -
Local time at epicenter: Wednesday, Aug 4, 2021 11:51 pm (GMT -7)
Magnitude: 3.1
Depth: 17.4 km
Epicenter latitude / longitude: 33.75533°N / 116.98533°W (Riverside, California, United States)
Antipode: 33.755°S / 63.015°E
Nearest volcano: Lavic Lake (96 km / 60 mi)
Nearby towns and cities:
1 km (1 mi) NW of Hemet (pop: 83,900) --> See nearby quakes!
4 km (3 mi) SW of San Jacinto (pop: 47,000) --> See nearby quakes!
5 km (3 mi) WNW of East Hemet (pop: 17,400) --> See nearby quakes!
15 km (9 mi) ENE of Menifee (pop: 87,200) --> See nearby quakes!
19 km (12 mi) S of Beaumont (pop: 43,800) --> See nearby quakes!
23 km (14 mi) E of Perris (pop: 75,000) --> See nearby quakes!
30 km (19 mi) SE of Moreno Valley (pop: 204,200) --> See nearby quakes!
31 km (19 mi) NE of Murrieta (pop: 109,800) --> See nearby quakes!
44 km (27 mi) ESE of Riverside (pop: 322,400) --> See nearby quakes!
672 km (418 mi) SE of Sacramento (pop: 490,700) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 25.7°C (78 F), humidity: 52%, wind: 2 m/s (3 kts) from SW
Primary data source: USGS (United States Geological Survey)
Estimated released energy: 2.8 x 109 joules (783 kilowatt hours, equivalent to 0.674 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
3.117 kmNear San Bernardino, California, USAUSGS

User reports for this quake (81)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Murrieta Hot Springs, Riverside, California (21.1 km SSW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s : heard it before i felt it | One user found this interesting.  
Murrieta Hot Springs, Riverside, California (21.1 km SSW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s : heard it before i felt it | One user found this interesting.  
Hemet (6.2 km SW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : I heard it before I felt it. | One user found this interesting.  
Murrieta. CA / Very weak shaking (MMI II) : I was upstairs on 2nd floor in my bedroom on my chase lounge and my son was in his upper bunk bed. We felt an upward quick movement and as the movement came down you could feel an impact vibration with slight shift shak | One user found this interesting.  
  • This is the first time we’ve heard a description of an earthquake such as yours. We hope that the seismologists are taking notes and will investigate these unusual earthquake tremors. Sounds very serious to us.
2197 larkspur ct San jacinto ca / Moderate shaking (MMI V) / single lateral shake / 2-5 s : Very loud hard shake. | One user found this interesting.  
Murrieta Hot Springs, Riverside, California (28.3 km SW of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short
La Quinta, Riverside, California (67.7 km E of epicenter) [Map] / not felt (reported through our app)
Menifee, Riverside, California (16.5 km WSW of epicenter) [Map] / Very weak shaking (MMI II) / 1-2 s (reported through our app)
Rancho Penasquitos, San Diego, California (90 km S of epicenter) [Map] / not felt
Highgrove, Riverside, California (41.1 km NW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / very short
Murrieta Hot Springs, Riverside, California (25.4 km SW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating
Murrieta, Riverside, California (32.8 km SW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Bellflower CA / not felt
MURRIETA / Light shaking (MMI IV) / single lateral shake / 1-2 s : The box next to me tipped over  
Murrieta,ca / Light shaking (MMI IV) / very short
Perris / Very weak shaking (MMI II) / single lateral shake / very short
HEMET / not felt : Nothing  
Ontario, CA / Very weak shaking (MMI II) / 1-2 s : Shaking  
Orangecrest (34.5 km WNW of epicenter) [Map] / Weak shaking (MMI III)
San Jacinto / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Dry light shaking quick  
riverside / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s
Wildomar / Very weak shaking (MMI II) / single lateral shake / 1-2 s : Laying in bed and a subtle shaking of the bed and brief vibrating from cups on side table was heard.  
SAN JACINTO / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s
Temecula (31.3 km SSW of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / 1-2 s : Temecula  
Hemet,CA (7.3 km ESE of epicenter) [Map] / Weak shaking (MMI III) / very short : Just a quick jolt and that’s it.  
Norco / Light shaking (MMI IV) / rattling, vibrating / very short
San Jacinto / Light shaking (MMI IV) / 1-2 s
Riverside (41.4 km NW of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s
San Jacinto CA / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s
2904 peach tree street (25.6 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / very short : real quick loud jolt like there was a crash.  
MENIFEE / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s
Winchester, CA / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s
My room bed / Very weak shaking (MMI II) / very short : Walls cracking and super quick  
Menifee Ca / Light shaking (MMI IV)
Perris california / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : How strong it was because I felt 1 and a secons later i felt an other stronger than de firs one  
San Jacinto / Very weak shaking (MMI II) / rattling, vibrating / very short
8.6 km WSW of epicenter [Map] / Very weak shaking (MMI II) / single vertical bump / very short
menifee, / Very weak shaking (MMI II) / single lateral shake / 1-2 s
San Jacinto / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : You were able to feel and hear the vibration.  
Hemet / Light shaking (MMI IV) / rattling, vibrating / 1-2 s
10.2 km SW of epicenter [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
MORENO VALLEY / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Felt my bed shake  
Perris / not felt : Felt the house shake and my concrete split  
Winchester / Weak shaking (MMI III) / complex motion difficult to describe / 1-2 s
Winchester / Weak shaking (MMI III) / rattling, vibrating
Temecula / Light shaking (MMI IV) / rattling, vibrating / 5-10 s
Temecula / Light shaking (MMI IV) / single lateral shake / very short
Hemet (1.3 km E of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s
San jacinto / Very weak shaking (MMI II) / single lateral shake / very short
San jacinto (2.8 km NE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
Murrieta / Very weak shaking (MMI II) / 2-5 s : Slight rumble. If quiet in my house and I'm reading emails. Can feel a very subtle rumble then moments later another one lasting roughly 5-8 seconds  
Menifee / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Low bass rumble a few seconds long  
Menifee / Very weak shaking (MMI II) / very short
Hemet / Very weak shaking (MMI II) / very short
Winchester (24.5 km SSW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / very short
Hemet / Weak shaking (MMI III) / rattling, vibrating / very short
28.3 km SW of epicenter [Map] / Very weak shaking (MMI II) / single vertical bump / very short
28.2 km SW of epicenter [Map] / Weak shaking (MMI III) / 1-2 s : Rolling feeling very short  
Perris / Weak shaking (MMI III) / horizontal (sideways) swinging / very short
Menifee / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s
San Jacinto / Moderate shaking (MMI V) / vibration and rolling / 2-5 s
Menifee / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : Shaky enough to wake up my dog  
Hemet, ca / Light shaking (MMI IV) / vibration and rolling / 2-5 s
5.1 km NNE of epicenter [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s
Riverside / Very weak shaking (MMI II) / single vertical bump / very short
murrieta / Weak shaking (MMI III) / rattling, vibrating / very short
near mission inn
Murrieta / Very weak shaking (MMI II) / single lateral shake / very short : Slight shake didn’t last very long  
Lake Elsinore / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
San Jacinto (2.7 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Menifee / Very weak shaking (MMI II) / rattling, vibrating / 1-2 s : Loud rumble sound for 1-2 seconds and the tinyest shake  
Riverside (43.7 km WNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
Moreno Valley / Weak shaking (MMI III) / very short
Riverside, Ca / Very weak shaking (MMI II) / 1-2 s
Perris / Very weak shaking (MMI II) / single lateral shake / very short
hemet ca 92543 / Weak shaking (MMI III) / rattling, vibrating / 5-10 s
Temecula / Very weak shaking (MMI II) / single lateral shake / 1-2 s
Winchester / Weak shaking (MMI III) / rattling, vibrating / 1-2 s
riverside ca / Very weak shaking (MMI II) / rattling, vibrating / very short
Laguna Beach Ca. / not felt / 10-15 s : Continues light vibrating shaking. Maybe 10 plus seconds  
23.7 km NNW of epicenter [Map] / Very weak shaking (MMI II) / rattling, vibrating / 15-20 s
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