Info on the earthquake: mag. Earthquake 4.8 – 41 km south of Lambarene, Moyen-Ogooué, Gabon, April 27 01:40 (GMT +1)
Average magnitude earthquake 4.8 to 10 km deep
27 Apr 00:53 AM UTC: First to report: GFZ after 13 minutes.
27 Apr 07:50: Epicenter location corrected 12 km (7.2 mi) towards SSW.
Updated Tue, April 27 2021, 12:57 AM
Magnitude 4.8 earthquake strikes near Lambarene, Moyen-Ogooué, Gabon
4.8 earthquake April 27 1:40 a.m. (GMT +1)
The event was classified by the German Geoscience Research Center (GFZ), the first seismological agency to report it.
Our monitoring service identified a second report from the European-Mediterranean Seismological Center (EMSC) which also listed the earthquake at a magnitude of 4.8.
Based on preliminary seismic data, the earthquake should not have caused significant damage, but was likely felt by many people to be slight vibrations in the epicenter area.
Weak tremors could have been felt in Lambarene (20,700 inhabitants), located 29 km from the epicenter, and in Fougamou (5,600 inhabitants) at 51 km.
Other towns close to the epicenter where the earthquake could have been felt as very weak tremors include Ndjolé (5,100 residents), located 107 km from the epicenter.
VolcanoDiscovery will automatically update the magnitude and depth if these change and follow up if other important earthquake information becomes available. If you are in the region, please let us know about your experience through our reporting mechanism, either online or via our mobile application. This will help us provide more first-hand updates to anyone in the world who is interested in learning more about this earthquake.
If you were or still are in this area during the earthquake help others with your comments and file a quick report here.
Seismic data:
I felt this earthquake
I didn’t feel it
Date and time: April 27, 2021 00:40:56 UTC –
Local time at epicenter: April 27 01:40 (GMT +1)
Magnitude: 4.8
Depth: 10.0 km
Epicenter latitude / longitude: 1.06 ° S / 10.17 ° E 
(Moyen-Ogooué, Gabon)
Neighboring towns:
41 km (25 mi) south of Lambarene (pop: 20700) -> See nearby earthquakes!
49 km (31 mi) west of Fougamou (Ngouni) (pop: 5650) -> See nearby earthquakes!
118 km (74 mi) SW of Ndjolé (pop: 5100) -> See nearby earthquakes!
133 km (83 mi) northwest of Mouila (Ngouni) (pop: 22,500) -> See nearby earthquakes!
159 km (99 mi) ESE of Port-Gentil (Ogooué-Maritime) (pop: 109,200) -> See nearby earthquakes!
180 km (112 mi) SSE of Libreville (Estuary) (pop: 578,200) -> See nearby earthquakes!
227 km (141 mi) NNW of Tchibanga (Nyanga) (pop: 19400) -> See nearby earthquakes!
255 km (159 mi) west of Koulamoutou (Ogooué-Lolo) (pop: 16,200) -> See nearby earthquakes!
335 km (208 mi) SSO of Oyem (Woleu-Ntem) (pop: 30,900) -> See earthquakes nearby!
413 km (257 mi) ESE of São Tomé (São Tomé Island, São Tomé and Príncipe) (pop: 53,300) -> See nearby earthquakes!
Clouds covered
24.1 ° C (75 F), humidity: 96%, wind: 1 m / s (2 kts) from SSWMain data source: GFZ (German Geoscience Research Center)
Estimated energy released: 1 x 1012 joules (278 megawatt hours, equivalent to 239 tonnes of TNT) More info
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Also if you did NOT feel the earthquake even if you were in the area, please report it! Your contribution is also valuable for earthquake science and seismic risk analysis and mitigation efforts. You can use your device’s location or the map to show where you were during the earthquake. Thank you!
Data for the same earthquake reported by different agencies
Info: The more agencies report the same earthquake and publish similar data, the more confidence you can have in the data. It normally takes up to a few hours for the earthquake parameters to be calculated with near optimum accuracy.
| Magnitude | Depth | Location | Source |
| 4.8 | 10 km | Gabon | GFZ |
| 4.7 | 10 km | GABON | EMSC |
| 4.7 | 10 km | 40 km S of Lambaréné, Gabon | USGS |
User reports for this earthquake (3)
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City of Libreville Owendo south of Libreville by sea (170.8 km NNW from epicenter) [Map] / not felt : I live in Owendo, south of Libreville, about 200 km from Lambarene, didn’t feel any signs but called my field partners in central Lambarene. They have confirmed the earthquake and believe it is the sixth incident in a month. They wonder if the seismic activities of the oil company in the region can cause this earthquake? | One user found this interesting.
Lambaréné, former hospital (40.1 km N of epicenter) [Map] / Slight shaking (MMI IV) / clicking, vibration / 1-2 s : Lying and lightly asleep on my bed, I felt my bed and the floor shake | One user found this interesting.
Lambaréné, in the area of Lake Ezanga on the cha / Weak agitation (MMI III) / Complex rolling (tilting in several directions) / 5-10 s : I felt a vibration all over the place being on the bed when this happened. the bed moved in all directions and the wave moved away to four and one bar depending on the duration.
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Previous earthquakes in the same area
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