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

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

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

Date & time: Friday, 18 September 2020 21:43 UTC
Magnitude: 6.9
Depth: 10.0 km
Epicenter latitude / longitude: 0.86°N / 26.79°W (international territory)
Weather at epicenter at time of quake:
Few Clouds 25.8°C (78 F), humidity: 79%, wind: 7 km/h (4 kts) from SE
Primary data source: GFZ
Estimated released energy: 1.4 x 1015 joules (392 gigawatt hours, equivalent to 3.4 x 105 tons of TNT or 21.1 atomic bombs!) [learn more]
If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
TimeMag. / DepthLocationSource
Fri, 18 Sep 21:43 UTCM 6.9 / 10 kmCentral Mid Atlantic RidgeGFZ
Fri, 18 Sep 21:43 UTCM 6.7 / 10 kmCentral Mid-atlantic RidgeEMSC
Fri, 18 Sep 21:43 UTCM 6.9 / 10 kmCentral Mid-Atlantic RidgeUSGS
Fri, 18 Sep 21:43 UTCM 6.8 / 10 kmCentral Mid Atlantic RidgeGeoAu
Fri, 18 Sep 21:44 UTCM 6.1 / 10 kmCentral Mid Atlantic RidgeBMKG
Fri, 18 Sep 21:43 UTCM 6.6 / 0.8 kmBrazil [Sea]INGV

User reports for this quake (97)

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.
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Send your own user report!
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.
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 aftershock- like a combination punch. Felt like a 6 or 7- I mean it was bad | 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)
Brasília (2968 km SW of epicenter) [Map] / not felt : Não senti aqui na Asa Sul. | One user found this interesting. (reported through our app)
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.
3186.8 km SSW of epicenter [Map] / not felt (reported through our app)
2983.3 km SW of epicenter [Map] / not felt (reported through our app)
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)
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)
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)
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
2966.2 km SW of epicenter [Map] / not felt (reported through our app)
1478.5 km SW of epicenter [Map] / Very weak shaking (MMI II) (reported through our app)
3473.2 km SW of epicenter [Map] / not felt
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 this man Made? 4090 jackson st. Riv.92503 | 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 building swayed and I swore that we were going down with it. | 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.
Fallbrook Ca / Moderate shaking (MMI V) : Lite shaking, whole house creaking. My husband recognized it as an earthquake and ran to babies room in case it got harder.
East Whittier / Moderate shaking (MMI V) / rattling, vibrating / 15-20 s : Very unexpected. Stopped right after,it didn’t felt like it was going to continue with aftershock.itnjust stopped all sudden
Pebble Beach. Sun City. cA / not felt / rattling, vibrating / 20-30 s : I did feel it happen and my mirror started vibrating That hangs on my wall . Then I looked at it and realized something was happening then felt a hard shake . but felt it rolling and it seemed like it vibrated a long time. Usually the helicopters rattle the house. We live in a senior community and it startled alot of seniors. This was the San Gabriel 4.7 at 11:39 south of Rosemead. I am in Sun City ca. Also this did bot wake any pets as ar as I know.
Boa Ventura PB / not felt : Não sentido | 2 users found this interesting.
Simi Valley Ca 93065 / Weak shaking (MMI III) : I was reading in bed and felt the mattress moving | One user found this interesting.
West Covina / Light shaking (MMI IV) : It was very scary | One user found this interesting.
520 luminous Irvine ca / not felt
Ontario,ca / Strong shaking (MMI VI) / 2-5 s
Anaheim CA / Very weak shaking (MMI II) / single lateral shake : Weak shaking one or two seconds.
91320 Thousand Oaks, CA, USA / Light shaking (MMI IV) / complex motion difficult to describe / 5-10 s
Corona / Moderate shaking (MMI V)
Eastvale / Light shaking (MMI IV) : It scared me and it shook our whole house.
10243 walnut st, Bellflower CA, 90706 / Moderate shaking (MMI V) : I was sleeping and it woke me up.
Eastvale, Caluf / Moderate shaking (MMI V)
10243 walnut st, Bellflower CA, 90706 / Moderate shaking (MMI V) : I was sleeping and it woke me up.
Eastvale, Caluf / Moderate shaking (MMI V)
Bloomington, ca 92316 / Moderate shaking (MMI V) : Dogs barking and scared
Los Angeles, CA / Very strong shaking (MMI VII) / 5-10 s
Tillamook, OR / Weak shaking (MMI III)
Harrisburg Pa / not felt
West Hollywood / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s
Monrovia / Strong shaking (MMI VI) / rattling, vibrating
Downtown Los Angeles, CA - corner of 5th/Main Str / Light shaking (MMI IV) / both vertical and horizontal swinging
Los Angeles / Moderate shaking (MMI V) / single lateral shake / 5-10 s
Sally Williams of Alhambra ca / Violent shaking (MMI IX) / rattling, vibrating / 10-15 s
El Monte / Very strong shaking (MMI VII) : Sounded like a loud trembling noise! very strong.
Monterey Park - very strong jolt and shaking / Very strong shaking (MMI VII) / 10-15 s : This was much stronger jolt than the 1994 earthquake centered in Northridge.
La Palma, California / Strong shaking (MMI VI) / rattling, vibrating / 10-15 s : I’m from St. Louis, Missouri and have never experience nothing like it before.
santa ana / Moderate shaking (MMI V)
Santa Ana, California / Weak shaking (MMI III) : I was shook for a moment
Santa Ana / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s : It felt like a big shake sideways to small ones
Atwater, Los Angeles / Moderate shaking (MMI V) / vertical swinging (up and down) / 2-5 s
Glendale ca 91202 / Very strong shaking (MMI VII)
Buena park california / Very strong shaking (MMI VII) / simple rolling (tilting sideways along one direction) / 15-20 s
Montebello, CA / Moderate shaking (MMI V) / vertical swinging (up and down)
Irvine / Light shaking (MMI IV) / 2-5 s
LA / Fairfax district / Moderate shaking (MMI V)
14685 Sherman way / Moderate shaking (MMI V) : Scaries t for me- arrived in la in 1998
San Gabriel Blvd./ Lad Tunas Blvd. / Light shaking (MMI IV)
Lake Forest / Moderate shaking (MMI V) / 1-2 s : Woke me up, shook my bed. It was like a big boom
Compton / Strong shaking (MMI VI) / both vertical and horizontal swinging / 1-2 s : Scary
Simi valley / Strong shaking (MMI VI) / horizontal (sideways) swinging / 5-10 s
San Diego / not felt
Beaumont, ca / Light shaking (MMI IV) / single lateral shake / 2-5 s
Compton Ca / Weak shaking (MMI III) / horizontal (sideways) swinging / 10-15 s
La habra Ca / Very strong shaking (MMI VII)
whittier / Light shaking (MMI IV) / rattling, vibrating / 15-20 s
Hemet ca / Light shaking (MMI IV)
Near Pico & Roxbury Dr in West LA / Light shaking (MMI IV) / 2-5 s : typical California shake on the shorter side
Home Ontario California / Light shaking (MMI IV) / horizontal (sideways) swinging / 1-2 s
520 luminous Irvine ca / not felt
Los Angeles / Very strong shaking (MMI VII) / rattling, vibrating / 2-5 s
Altadena, CA / Light shaking (MMI IV) / single lateral shake / 2-5 s
Newbury Park / Light shaking (MMI IV)
Anaheim ca / Light shaking (MMI IV) : In bed felt start then shaking nothing fell or broken
Santa Clarita California / Very weak shaking (MMI II) / complex motion difficult to describe / 2-5 s : Tiny little rolls at about 1-2 seconads then nothing then about 3-5 seconds the tiny little rolls.
Compton California it last few seconds but we felt / Strong shaking (MMI VI) / 2-5 s : It felted strong here in Compton California
Westchester ca.90045 / Strong shaking (MMI VI)
Covina / Moderate shaking (MMI V) / 2-5 s
Chino, CA / Light shaking (MMI IV)
Li Palmdale california / Strong shaking (MMI VI)
Pacific Palisades / Moderate shaking (MMI V)
Riverside / Strong shaking (MMI VI)
Fullerton / Moderate shaking (MMI V)
STUDIO CITY / Moderate shaking (MMI V) : I felt a moderate shaking lasting about 7 seconds
Lawndale CA / Very weak shaking (MMI II) / horizontal (sideways) swinging / very short : Very small short quake felt very horizontal in nature over in a matter of seconds

Aftershocks of the 6.9 quake: Central Mid Atlantic Ridge, 18 Sep 2020 21:43

More info
Recorded aftershocks, latest first (1 quakes):
  • 20 Sep 2020 19:56 UTC
    | M 4.5 |
    10 km (6.2 mi) depth
    |
    15 km (10 mi) distance
    | USGS | Details

Earlier earthquakes in the same area since 1900

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

Map of earlier quakes

 

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