Mag. 3.9 earthquake - North Atlantic Ocean, 62 km northwest of Ribeira Grande, Castelo Branco, Açores, Portugal, on Wednesday, 13 Jan 2021 5:47 pm (GMT -1) -
This quake was likely an aftershock of the 5.4 quake North Atlantic Ocean, 63 km west of Ribeira Grande, Castelo Branco, Açores, Portugal, 11 Jan 2021 11:47 am (GMT -1), which had occurred 2 days earlier.
Quake Data | Interactive map | User Reports | Earlier quakes in same area | Quakes in Portugal | Azores | Lisbon

Minor magnitude 3.9 earthquake at 1 km depth
13 Jan 18:53 UTC: First to report: EMSC after 6 minutes.
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Local time at epicenter: Wednesday, 13 Jan 2021 5:47 pm (GMT -1)
Magnitude: 3.9
Depth: 1.0 km
Epicenter latitude / longitude: 38.78°N / 29.33°W

Nearest volcano: Fayal (48 km / 30 mi)
Nearby towns and cities:
62 km (39 mi) WNW of Ribeira Grande (Castelo Branco) (pop: 5,200) --> See nearby quakes!
67 km (42 mi) WNW of Horta (pop: 6,570) --> See nearby quakes!
1748 km (1086 mi) W of Lisbon (pop: 517,800) --> See nearby quakes!
59 km (37 mi) WNW of Faial Island (pop: 14,900) --> See nearby quakes!
Weather at epicenter at time of quake:
Scattered Clouds
16°C (61 F), humidity: 88%, wind: 5 m/s (9 kts) from SE
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Scattered Clouds

Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
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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.
Magnitude | Depth | Location | Source |
M 3.9 | 1 km | AZORES ISLANDS, PORTUGAL | EMSC |
M 3.8 | km | W Faial, Portugal | IVAR (AZO) |
User reports for this quake
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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There are no user reports for this quake yet. If you felt it Earlier earthquakes in the same area since 1900
Mag. 3.9 earthquake - North Atlantic Ocean, 62 km northwest of Ribeira Grande, Castelo Branco, Açores, Portugal, on Wednesday, 13 Jan 2021 5:47 pm (GMT -1)- Date / time UTC| Mag |Depth|Age|Distance| Details
- 01 Jan 1980 16:42| 6.7 |10km / 6.2mi|41 years ago|134km / 84mi| Azores Islands, Portugal
- 09 Jul 1998 05:19| 6.2 |10km / 6.2mi|23 years ago|63km / 39mi| Azores Islands, Portugal
- 11 Jan 2021 12:47| 5.4 |10km / 6.2mi|3 days ago|9km / 6mi| Azores Islands, Portugal
- 11 Jan 2021 13:33| 3.9 |unknown|3 days ago|9km / 6mi| NW Faial, Portugal
- 12 Jan 2021 04:06| 3.8 |5km / 3.1mi|3 days ago|16km / 10mi| AZORES ISLANDS, PORTUGAL
- 11 Jan 2021 12:51| 3.8 |unknown|3 days ago|11km / 7mi| W Faial, Portugal
- 13 Jan 2021 18:16| 3.7 |1km / 0.6mi|1 day 1 hours ago|3km / 2mi| AZORES ISLANDS, PORTUGAL
- 11 Jan 2021 13:54| 3.7 |unknown|3 days ago|6km / 4mi| NW Faial, Portugal
- 26 Dec 2020 06:13| 3.7 |3km / 1.9mi|3 weeks ago|35km / 22mi| AZORES ISLANDS, PORTUGAL
- 12 Jan 2021 13:35| 3.6 |unknown|2 days ago|6km / 3mi| W Faial, Portugal
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