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Very strong mag. 6.2 Earthquake - South Atlantic Ocean on Sunday, Oct 9, 2022, at 02:38 pm (GMT -2)

A very strong magnitude 6.2 earthquake occurred in the South Atlantic Ocean near the coast of  n/a in the early afternoon of Sunday, Oct 9, 2022 at 2.38 pm local time (GMT -2). The quake had a very shallow depth of 10 km (6 mi) and was reported felt by some people near the epicenter.

Very strong mag. 6.2 Earthquake - South Atlantic Ocean on Sunday, Oct 9, 2022, at 02:38 pm (GMT -2) Very strong mag. 6.2 Earthquake - South Atlantic Ocean on Sunday, Oct 9, 2022, at 02:38 pm (GMT -2)

Very strong magnitude 6.2 earthquake at 10 km depth

9 Oct 16:48 UTC: First to report: GFZ after 10 minutes.
9 Oct 16:48: Epicenter location corrected by 4.6 km (2.8 mi) towards NNW.
9 Oct 17:02: Now using data updates from USGS
9 Oct 18:00: Epicenter location corrected by 4.1 km (2.5 mi) towards NW.

Earthquake details

Date & timeOct 9, 2022 16:38:04 UTC
Local time at epicenterSunday, Oct 9, 2022, at 02:38 pm (GMT -2)
StatusConfirmed
Magnitude6.2
Depth10.0 km
Epicenter latitude / longitude1.3796°S / 23.9039°WInternational Territory (not near any country)
Seismic antipode1.3796°N / 156.0961°E
Shaking intensityVery strong shaking near epicenter
Felt1 report
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoUnnamed 3.5°S/24.5°W (245 km / 152 mi)
Weather at epicenter at time of quakeBroken Clouds 26.5°C (80 F), humidity: 74%, wind: 5 m/s (10 kts) from SE
Estimated seismic energy released1.3 x 1014 joules (35 gigawatt hours, equivalent to 30089 tons of TNT or 1.9 atomic bombs!) | about seismic energy
Interactive map
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Nearby places

User-reports for this quake (4)

We received 4 reports for this quake.
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Leave a comment if you find a particular report interesting or want to add to it.
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Martinique / Weak shaking (MMI III) / rattling, vibrating / 2-5 s : Un grondement et ensuite une secoussse | 3 users found this interesting.  
Charleston wv / not felt : Nothing | One user found this interesting.  
Henrietta NY / not felt : The house made slight popping noises yesterday.  
Gilmorton, Leicestershire England / not felt

What is Intensity and the Mercalli Intensity Scale?


The amount of shaking that occurs on the surface due to an earthquake is called the intensity. It is commonly measured on the so-called Modified Mercalli Intensity Scale (MMI) ranging from 1 (not felt) to 10 (extreme shaking), and given in Roman numerals as I,II,...IX, X, and often displayed with color codes ranging from light blue to dark red.
Earthquake intensity depends mainly on the magnitude and depth of the quake as well as the distance from the epicenter: The further away, the less shaking intensity occurs.
Read more about the MMI scale!

Compare Quake Data

Data for the same earthquake as reported by different agencies

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 Depth Time GMT
2022-10-9
Epicenter Agency
6.2 10 km
6.2 mi
(*)
16:38:04 Central Mid-Atlantic Ridge USGS (United States Geological Survey)
6.2 10 km
6.2 mi
(*)
16:38:09 CENTRAL MID-ATLANTIC RIDGE
10.9 km (6.8 mi) epicenter difference with USGS
EMSC (European-Mediterranean Seismological Centre)
6.2 10 km
6.2 mi
(*)
16:38:04 Central Mid Atlantic Ridge
0 km (0 mi) epicenter difference with USGS
RaspberryShake (RaspberryShake)
5.2 10 km
6.2 mi
(*)
16:38:11 Near Recife
54 km (34 mi) epicenter difference with USGS
RENASS (Réseau National de Surveillance Sismique (RéNaSS))
5.6 0.8 km
0.5 mi
16:38:13 Central Mid-Atlantic Ridge [Sea]
90 km (56 mi) epicenter difference with USGS
INGV (Istituto Nazionale di Geofisica e Vulcanologia)
6.2 10 km
6.2 mi
(*)
16:38:11 Central Mid-Atlantic Ridge
51 km (32 mi) epicenter difference with USGS
GFZ (German Research Centre for Geosciences)
6.1 10 km
6.2 mi
(*)
16:38:07 Central Mid Atlantic Ridge
18 km (11 mi) epicenter difference with USGS
GeoAu (Geoscience Australia )
6.2 10 km
6.2 mi
(*)
16:38:04 Central Mid-Atlantic Ridge
0 km (0 mi) epicenter difference with USGS
IRIS (Incorporated Research Institutions for Seismology)
5.2 0 km
0 mi
16:38:07 Central Mid Atlantic Ridge
45 km (28 mi) epicenter difference with USGS
OBSIS (Observatório Sismológico da Universidade de Brasília)
Notes:
(*) A depth given as 10 km often means that the the depth of the quake could not determined with sufficient accuracy.

Seismograms

Seismic station: Riachuelo, Brazil (RCBR/IU network) | Distance from quake: 1420 km / 882 mi | Show on map | Station Info
Seismic station Riachuelo, Brazil: 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. Bandpass filter applied: 0.02-5.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

Aftershocks for this quake

So far, only one aftershock has been recorded. It hit 4 days after the mainshock in 24 km (15 mi) distance. When more aftershocks are detected, we will update this section.

What are aftershocks?


Larger earthquakes (above magnitude 5 or so) such as this one are usually followed by smaller ones known as aftershocks that occur in the same area during the days, weeks, months or even years after the main shock.
[More info]

What about this quake?


Based on its magnitude, the fault that was active during the quake likely ruptured beneath a surface of approx. 158 km2 (=61 sqare miles) as a first-order estimate. The length of the rupture zone thus was probably around 22 km (14 mi).
[More info]


Recorded aftershocks, latest first (1 quake)

Date and Time GMTMag
Depth
DistanceRegionDetails
Oct 14, 2022 01:49 am (GMT -2)
1 year 20 weeks ago
4 days after main shock
4.7

10 km
24 km (15 mi)
NE of main shock
Central Mid-Atlantic RidgeMore
Oct 9, 2022 02:38 pm (GMT -2)
1 year 21 weeks ago
6.2

10 km
0 km - This quakeSouth Atlantic Ocean
Main Shock (this quake)
More

Map of aftershocks

Earthquake statistics

Average number of earthquakes

Based on data from the past 10 years and our earthquake archive back to 1900, there are about 13 quakes on average per year in the area near the epicenter of this quake (within 100 km/61 mi):
  • Mag. 7 or higher: 0.02 quakes per year (or 1 quake every 62.5 years)
  • Mag. 6 or higher: 0.1 quakes per year (or 1 quake every 10.3 years)
  • Mag. 5 or higher: 0.47 quakes per year (or 1 quake every 2.1 years)
  • Mag. 4 or higher: 1.41 quakes per year
  • Mag. 3 or higher: 1.48 quakes per year
  • Mag. 2 or higher: 1.48 quakes per year
The area where this quake occurred has a very high level of seismic activity. It has had at least 2 quakes above magnitude 7 since 1900, which suggests that larger earthquakes of this size occur infrequently, probably on average approximately every 60 to 65 years.

Number of quakes per year

Previous quakes in the same area of this earthquake

Map of earlier quakes in the area of this quake

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Map to embed or share

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