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Strong mag. 6.9 earthquake - Central Mid Atlantic Ridge on Friday, 18 September 2020 - information

Major magnitude 6.9 earthquake - North Atlantic Ocean on Friday, September 18, 2020 at 21:43 GMT

Major magnitude 6.9 earthquake - North Atlantic Ocean on Friday, September 18, 2020 at 21:43 GMT Major magnitude 6.9 earthquake - North Atlantic Ocean on Friday, September 18, 2020 at 21:43 GMT

Major magnitude 6.9 earthquake at 10 km depth

18 Sep 21:53 UTC: First to report: GFZ after 9 minutes.
18 Sep 21:53: Magnitude recalculated from 6.7 to 6.6. Epicenter location corrected by 11.3 km (7 mi) towards SSE.
... [show all] ...
19 Sep 07:04: Magnitude recalculated from 6.8 to 6.9.
Update Sat, 19 Sep 2020, 10:24

Strong earthquake in the central mid-Atlantic ridge widens the Atlantic ocean a bit

Seismic plot of the quake recorded by a seismic station in Riachuelo, Brazil
Seismic plot of the quake recorded by a seismic station in Riachuelo, Brazil
A strong earthquake of magnitude 6.9 occurred in the central mid-Atlantic ridge last evening. It was far from any populated areas and only very weak shaking could be felt by some people in the NE coastal areas of Brazil. No tsunami was generated by the event.
The quake resulted from extension along the spreading plate boundary between the South American and African plates, and the central Atlantic Ocean became probably a few cm wider as consequence.

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Earthquake details

Date & timeSep 18, 2020 21:43:58 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.9
Depth10.0 km
Epicenter latitude / longitude0.86°N / 26.79°W (international territory)
Antipode0.86°S / 153.21°E
Shaking intensityStrong shaking
Felt75 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities
Weather at epicenter at time of quakeFew Clouds 25.8°C (78 F), humidity: 79%, wind: 7 km/h (4 kts) from SE
Estimated seismic energy released1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 atomic bombs!) | about seismic energy
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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
6.910 kmCentral Mid Atlantic RidgeGFZ
6.710 kmCentral Mid-atlantic RidgeEMSC
6.910 kmCentral Mid-Atlantic RidgeUSGS
6.810 kmCentral Mid Atlantic RidgeGeoAu
6.110 kmCentral Mid Atlantic RidgeBMKG
6.60.8 kmBrazil [Sea]INGV

Seismograms

Seismic station: Morro de la Arena, Canary Islands (MACI/IU network) | Distance from quake: 3236 km / 2011 mi | Show on map | Station Info
Seismic station Morro de la Arena, Canary Islands: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (97)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Monterey Park (10079.6 km NW of epicenter) [Map] / Severe shaking (MMI VIII) : Was strongest jolt I have felt from any earthquake - I have been in SoCal for 40 years. Many items fell from shelves. Caught laptop computer as it was falling from desk. Window and door panes shook very strongly. Thought they would reak. | One user found this interesting.  
Los Angeles, California (10095.8 km NW of epicenter) [Map] / Moderate shaking (MMI V) / 5-10 s : Me Llegó Un Mensaje a Mi Celular; Informandome de UN TERREMOTO,y En Seguida Se Comenzó a Sentir... Me Enconteaba Recostado y Despierto; Sinceramente NO ME ASUSTE, y Procuró NO ALARMARME: Para Poder Tomar UNA MEJOR DECISIÓN, de Ser Necesaria . . .  
Teresina/PI - BR (1888.3 km WSW of epicenter) [Map] / not felt : Movimento divergente. Sem tsunami ou tremor significativo na zona continental brasileira. | 5 users found this interesting. (reported through our app)  
Norwalk, CA, USA (10078.5 km WNW of epicenter) [Map] / Strong shaking (MMI VI) / both vertical and horizontal swinging / 20-30 s : It felt like it was right under my house Whole house shook, tv went out, things fell & some pictures fell from walls, very LOUD, really strong floor vibrations- I was off balance after.Cats ran somewhere for cover. Seemed like 2 or an almost simultaneous | One user found this interesting.  
Brasília (2968 km SW of epicenter) [Map] / not felt : Não senti aqui na Asa Sul. | One user found this interesting. (reported through our app)  
Glendale, Los Angeles, California (10088.1 km NW of epicenter) [Map] / not felt : No shaking. Too far away. | One user found this interesting.  
São Pedro (1237.7 km SW of epicenter) [Map] / not felt : I didn't feel anything even though living pretty near the epicenter.  
Rio De Janeiro (3186.8 km SSW of epicenter) [Map] / not felt (reported through our app)
Contagem (2983.3 km SW of epicenter) [Map] / not felt (reported through our app)
Birigui, São Paulo (3551.1 km SW of epicenter) [Map] / Very weak shaking (MMI II) / complex motion difficult to describe : Prolonged bang, loud humming in the ear. (reported through our app)  
Jaboatão, Pernambuco (1352.7 km SW of epicenter) [Map] / not felt (reported through our app)
Rio de janeiro (3146.1 km SSW of epicenter) [Map] / not felt (reported through our app)
Santos, São Paulo (3474.4 km SW of epicenter) [Map] / not felt (reported through our app)
Orange,CA (10055.4 km WNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Los Angeles, 90068 (45 km SSW of epicenter) [Map] / Moderate shaking (MMI V)
Mission viejo (509.8 km N of epicenter) [Map] / Very strong shaking (MMI VII) / 2-5 s : I felt a small shake first, them a stronger shake. 2-5 seconds.  
East Los Angeles (10083.8 km NW of epicenter) [Map] / Moderate shaking (MMI V) / very short
Camarillo (10164.9 km NW of epicenter) [Map] / Light shaking (MMI IV)
North El Monte, Los Angeles, California (10070.5 km NW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / very short
Recife Pernambuco (1341.2 km SW of epicenter) [Map] / not felt : Não sentido (reported through our app)  
Fortaleza (1402.8 km WSW of epicenter) [Map] / not felt : Not felt in Fortaleza  
near Ribeirão das Neves (2966.2 km SW of epicenter) [Map] / not felt (reported through our app)
Belo Jardim (1478.5 km SW of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Taboão da Serra, São Paulo (3473.2 km SW of epicenter) [Map] / not felt
29 km of Princesa Isabel, Paraiba (1555.2 km SW of epicenter) [Map] / not felt (reported through our app)
Boa Ventura PB (1567 km SW of epicenter) [Map] / not felt : Não sentido (reported through our app)  
San Gabriel, California / Light shaking (MMI IV) / rattling, vibrating / 5-10 s : My whole room shook and good thing items on my shelves didn't fall. It wasn't that strong, but I felt the vibration and the shaking! I'm grateful it wasn't serious! | 3 users found this interesting.  
Price / Violent shaking (MMI IX) : It hasn't stopped shaking here in the nine months I've been in this apartment two buildings on each side both brick I'm in a trailer the trailer is solid or was they're not reporting the earthquakes here they say it's he's carbon but it's not it's here | 2 users found this interesting.  
4090 jackson st. Riv.ca. 92503 / Light shaking (MMI IV) / rattling, vibrating / 1-2 s : Walls and ceiling shaking Strong shaking. Same thing Happened after 10p last night Not as strong.vanburen Near walmart. Strange..not Normal 2 nights back to back Near same time frame. No Damage.lasted just long Enough that i knew it was Earth QUAKE. Was t | One user found this interesting.  
Downtown Los Angeles, CA / Strong shaking (MMI VI) / rattling, vibrating / 20-30 s : The 6 th floor is where I am located at the top of this decidedly low-quality building & the rattling and shaking were incredibly strong that I put on my shoes to run outside. The dog is still scared and there are aftershocks continuously vibrating. This | One user found this interesting.  
Simi Valley CA / not felt / horizontal (sideways) swinging / 2-5 s : I had to question myself if it was really an earthquake then I realized that the stereo stand we have would have not moved on it’s own it would have to get bumped into | One user found this interesting.  
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Aftershocks

[More info]

Recorded aftershocks, latest first (3 quakes)

Date and timeMag
Depth
LocationDetails
Jan 3, 2021 05:25
1 year 47 weeks ago
4.9

10 km
North Atlantic OceanMore
Nov 8, 2020 06:31
2 years ago
5.3

10 km
North Atlantic OceanMore
Sep 20, 2020 19:56
2 years ago
4.5

10 km
North Atlantic OceanMore

Earlier earthquakes in the same area

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