Contact | RSS | EN | DE | EL | ES | FR | IT | RU

Strong mag. 5.5 earthquake - 63 km southwest of Guaymas, Sonora, Mexico, on 2021-07-31 10:39:19 (Hora de México)

Strong mag. 5.5 earthquake - 63 km southwest of Guaymas, Sonora, Mexico, on 2021-07-31 10:39:19 (Hora de México) Strong mag. 5.5 earthquake - 63 km southwest of Guaymas, Sonora, Mexico, on 2021-07-31 10:39:19 (Hora de México)

Strong magnitude 5.5 earthquake at 5 km depth

31 Jul 15:44 UTC: First to report: VolcanoDiscovery after 6 minutes.
31 Jul 15:48: Now using data updates from GFZ
31 Jul 16:07: Now using data updates from SSN
Update Sat, 31 Jul 2021, 15:54

Significant earthquake of magnitude 5.0 just reported 82 km southwest of Guaymas, Mexico

5.0 quake 31 Jul 8:39 am (GMT -7)
5.0 quake 31 Jul 8:39 am (GMT -7)
An earthquake of magnitude 5.0 occurred in the morning on Saturday 31 July 2021 at 8:39 am local time near Guaymas, Sonora, Mexico, as reported by the German Research Centre for Geosciences (GFZ).
According to preliminary data, the quake was located at a shallow depth of 10 km. 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 5.0 earthquake 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 Isla San Marcos (pop. 390) located 62 km from the epicenter, Mulegé (pop. 3,900) 75 km away, Santa Rosalia (pop. 11,800) 75 km away, San Carlos (pop. 2,300) 75 km away, Guaymas (pop. 113,100) 82 km away, San José de Guaymas (pop. 1,100) 88 km away, and Empalme (pop. 42,500) 91 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

Download the Volcanoes & Earthquakes app and get one of the fastest seismic alerts online: Android | iOS

Earthquake details

Date & timeJul 31, 2021 15:39:19 UTC
Local time at epicenter2021-07-31 10:39:19 (Hora de México)
StatusConfirmed
Magnitude5.5
Depth5.0 km
Epicenter latitude / longitude27.63°N / 111.45°W (Gulf of California, Mexico)
Antipode27.63°S / 68.55°E
Shaking intensityLight shaking
Felt48 reports
Primary data sourceSSN (Servicio Sismológico Nacional)
Nearest volcanoIsla Tortuga (37 km / 23 mi)
Nearby towns and cities50 km (31 mi) SW of La Manga (pop: 146) | Show on map | Quakes nearby
63 km (39 mi) WSW of Guaymas (pop: 113,100) | Show on map | Quakes nearby
73 km (45 mi) WSW of Empalme (pop: 42,500) | Show on map | Quakes nearby
87 km (54 mi) ENE of Santa Rosalia (pop: 11,800) | Show on map | Quakes nearby
98 km (61 mi) NNE of Mulegé (pop: 3,850) | Show on map | Quakes nearby
135 km (84 mi) S of Miguel Aleman (La Doce) (Miguel Alemán) (pop: 30,900) | Show on map | Quakes nearby
150 km (93 mi) W of Cd. Obregon (pop: 298,600) | Show on map | Quakes nearby
150 km (93 mi) W of Esperanza (pop: 39,000) | Show on map | Quakes nearby
170 km (106 mi) SSW of Hermosillo (pop: 715,100) | Show on map | Quakes nearby
200 km (124 mi) WNW of Huatabampo (pop: 30,500) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 33.1°C (92 F), humidity: 68%, wind: 2 m/s (4 kts) from NNW
Estimated seismic energy released1.1 x 1013 joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) | about seismic energy
Show interactive Map
[smaller] [bigger]

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
5.55 kmMexico: 63 Km Al SUROESTE De H GUAYMAS, SONSSN
5.52 kmMexico: GULF OF CALIFORNIAEMSC
5.510 km65 Km SW of San Carlos, MexicoUSGS
5.010 kmMexico: Near HermosilloRENASS
5.510 kmMexico: Gulf of CaliforniaGFZ
5.510 kmMexico: Gulf of CaliforniaGeoAu

User reports for this quake (54)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Contribute:
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!
Translate
Empalme, Sonora (72.1 km ENE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 30-60 s : It was so strong that it woke me up, my bed was moving from side to side and I could hear the windows shaking | 4 users found this interesting.  
Hermosillo, Sonora / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : I felt like I was dizzy | 4 users found this interesting.  
Hermosillo / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : I was on my bed in the second floor, so I feel it because my head was resting in the wall and then I saw my chair and bookshelf vibrate, for a few seconds. | 2 users found this interesting.  
HERMOSILLO AT 8 AM, TABLE MOVEMENT (255.5 km ENE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / very short : table movement, walls, | One user found this interesting.  
Hermosillo, Sonora (165.7 km NNE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : house moving side to side | One user found this interesting.  
Hermosillo (168.2 km NNE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s : Was on bed and awaken by the room moving side to side. | One user found this interesting.  
Hermosillo / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : felt bed moved. clothes swing hanging in closet | One user found this interesting.  
Empalme (75.5 km ENE of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 1-2 s : All my water containers began to shake. Doors and shelves shook to. Pets got inside the house. | One user found this interesting.  
Guaymas (63 km ENE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : noise in we=indows like a heavy car passing thru all house shake windows | One user found this interesting.  
North Pacific Ocean (636.7 km NW of epicenter) [Map] / not felt
Empalme, Sonora (75.1 km ENE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s
Empalme, Sonora (71.4 km ENE of epicenter) [Map] / Light shaking (MMI IV) / complex motion difficult to describe / 5-10 s
near Hermosillo, Sonora (162.6 km NNE of epicenter) [Map] / not felt : Other people did (reported through our app)  
Hermosillo (165.3 km NNE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 1-2 s : Vibratiln  
Guaymas, Sonora (61.3 km NE of epicenter) [Map] / Weak shaking (MMI III) / 15-20 s : I am very scared  
San Carlos, Guaymas, Sonora (49.3 km NE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : A  
Hermosillo (171.1 km NNE of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 2-5 s
San Fernando, Los Angeles, California (998.5 km NW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Guaymas sonora (60.4 km NE of epicenter) [Map] / Weak shaking (MMI III) / single vertical bump / 10-15 s
Guaymas (65.7 km NE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Noisy  
Hermosillo / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
San carlos, sonora, Mexico / Weak shaking (MMI III) / rattling, vibrating / 15-20 s
Hermosillo / Very weak shaking (MMI II) / single lateral shake / 2-5 s
Sandy, People's Republic of Utah (1437.4 km N of epicenter) [Map] / not felt : Didn't feel it, but your mom did. (reported through our app)  
San carlos sonora mexico / Very weak shaking (MMI II) / horizontal (sideways) swinging / 15-20 s : Woke up by sideway movements while in bed.. looked across the room to see my wife and daughter on the other bed shaking sideways as well.. go up from bed and kept shaking sideways while i was standing up standing up.  
HERMOCILLO,SON,MX. / Very weak shaking (MMI II) / single lateral shake / 15-20 s
Esstvale, California. (916.4 km NW of epicenter) [Map] / not felt (reported through our app)
Hermosillo / Weak shaking (MMI III) / rattling, vibrating / 5-10 s : I felt softly swimming. My glassdoors moved  
Hermosillo,Sonora. México. / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Sentada con el respaldo pegado a la pared, sentí que me movió del respaldo de derecha a izquierda en varias ocasiones, me quedé quieta para ver si se repetía y sí, fue muy evidente el movimiento de un lado a otro, pero sin desplazamiento de la silla.  
Empalme Sonora / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : Me impresione  
San Carlos, Mexico (75 km E of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 15-20 s
Show more
Show more

Aftershocks

[More info]

Recorded aftershocks, latest first (18 quakes)

Date and timeMag
Depth
LocationDetails
Sep 27, 2021 21:24
1 year 36 weeks ago
4.0

16 km
75 km SW of Guaymas, Sonora, MexicoMore
Sep 3, 2021 21:55
1 year 39 weeks ago
3.7

20 km
76 km SW of Guaymas, Sonora, MexicoMore
Sep 3, 2021 21:44
1 year 39 weeks ago
3.7

20 km
87 km SW of Guaymas, Sonora, MexicoMore
Aug 28, 2021 06:02
1 year 40 weeks ago
3.6

16 km
77 km SW of Guaymas, Sonora, MexicoMore
Aug 19, 2021 21:16
1 year 41 weeks ago
3.5

16 km
69 km SW of Guaymas, Sonora, MexicoMore
Aug 19, 2021 21:14
1 year 41 weeks ago
3.4

16 km
69 km SW of Guaymas, Sonora, MexicoMore
Aug 19, 2021 17:22
1 year 41 weeks ago
2.7

13 km
81 km SW of Guaymas, Sonora, MexicoMore
Aug 19, 2021 09:38
1 year 41 weeks ago
3.3

15 km
84 km W of Guaymas, Sonora, MexicoMore
Aug 18, 2021 05:21
1 year 41 weeks ago
3.3

10 km
74 km SW of Guaymas, Sonora, MexicoMore
Aug 9, 2021 18:13
1 year 43 weeks ago - felt
4.0

10 km
74 km SW of Guaymas, Sonora, MexicoMore
Aug 8, 2021 07:31
1 year 43 weeks ago
2.8

20 km
67 km SW of Guaymas, Sonora, MexicoMore
Aug 4, 2021 08:45
1 year 43 weeks ago
3.7

10 km
66 km SW of Guaymas, Sonora, MexicoMore
Aug 2, 2021 16:29
1 year 44 weeks ago
3.9

13 km
75 km SW of Guaymas, Sonora, MexicoMore
Aug 1, 2021 15:05
1 year 44 weeks ago - felt
4.1

10 km
72 km W of Guaymas, Sonora, MexicoMore
Aug 1, 2021 09:50
1 year 44 weeks ago
4.0

8 km
65 km SW of Guaymas, Sonora, MexicoMore
Jul 31, 2021 21:07
1 year 44 weeks ago
4.3

10 km
70 km SW of Guaymas, Sonora, MexicoMore
Jul 31, 2021 20:27
1 year 44 weeks ago - felt
4.3

10 km
73 km SW of Guaymas, Sonora, MexicoMore
Jul 31, 2021 16:13
1 year 44 weeks ago - felt
4.0

18 km
71 km SW of Guaymas, Sonora, MexicoMore

Earlier earthquakes in the same area

Try our free app!
Volcanoes & Earthquakes - new app for Android
Android | iOS version

Support us - Help us upgrade our services!

We truly love working to bring you the latest volcano and earthquake data from around the world. Maintaining our website and our free apps does require, however, considerable time and resources.
We need financing to increase hard- and software capacity as well as support our editor team. We're aiming to achieve uninterrupted service wherever an earthquake or volcano eruption unfolds, and your donations can make it happen! Every donation will be highly appreciated. If you find the information useful and would like to support our team in integrating further features, write great content, and in upgrading our soft- and hardware, please make a donation (PayPal or Online credit card payment).

Planned features:
  • Improved multilanguage support
  • Tsunami alerts
  • Faster responsiveness
Thanks to your past donations, these features have been added recently:
  • Design upgrade
  • Detailed quake stats
  • Additional seismic data sources
Download and Upgrade the Volcanoes & Earthquakes app to get one of the fastest seismic and volcano alerts online:
Android | IOS
Thank you!
Stop Russia's Agression - Support Ukraine
Significant parts of this website use brilliant open-source software developed by Ukrainians. Russia's unprovoked war has killed tens of thousands, displaced millions, and the beautiful country of Ukraine is being destroyed. We cannot be silent even if the topic of this website has nothing to do with politics.
If you like to support Ukraine from abroad:
Ukrainians recommend the Come Back Alive charity. For other options, see StandWithUkraine.
Sources: VolcanoDiscovery / VolcanoAdventures and other sources as noted.
Use of material: Most text and images on our websites are owned by us. Re-use is generally not permitted without authorization. Contact us for licensing rights.
Volcanoes & Earthquakes
VolcanoDiscovery Home
Volcanoes | Earthquakes | Photos | Volcano News | App
Adventure & Study Travel
Tours to Volcanoes and Volcanic Areas: walking tours, photo tours, study tours
Tours & Dates | FAQ | About us
Get our newsletter!
Company info
Contact | Legal info | Terms & conditions
Follow us
Follow us on facebook Follow us on Instagram Follow us on Twitter Visit our Youtube channel
EN | DE | EL | ES | FR | IT | RU
VolcanoDiscovery GmbH, Germany, Reg. nr.: HRB 103744, EU Tax Id: DE 310 395 322 owned and created by
Dr. Tom Pfeiffer, volcanologist, volcano photographer, tour organizer member of
IAVCEI
Volcanological Society
Ecotourism Greece
Insured by R+V
VolcanoDiscovery © 2004- All Rights Reserved | Privacy - cookie settings