Strong mag. 5.0 earthquake - 3.1 Km SSW of Fagradalsfjall, Iceland, on Friday, 12 Mar 2021 7:43 am (GMT +0) -
This quake was likely an aftershock of the 5.1 quake 10.4 Km ESE of Grindavík, Iceland, 10 Mar 2021 3:14 am (GMT +0), which had occurred 2 days earlier.
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Strong magnitude 5.0 earthquake at 4 km depth
12 Mar 07:50 UTC: First to report: IMO after 7 minutes.
12 Mar 08:10: Magnitude recalculated from 4.2 to 3.8. Hypocenter depth recalculated from 3.8 to 4.3 km (from 2.4 to 2.7 mi). Epicenter location corrected by 2.2 km (1.4 mi) towards NNE.
12 Mar 17:30: Hypocenter depth recalculated from 3.4 to 3.7 km (from 2.1 to 2.3 mi).
12 Mar 08:10: Magnitude recalculated from 4.2 to 3.8. Hypocenter depth recalculated from 3.8 to 4.3 km (from 2.4 to 2.7 mi). Epicenter location corrected by 2.2 km (1.4 mi) towards NNE.
12 Mar 17:30: Hypocenter depth recalculated from 3.4 to 3.7 km (from 2.1 to 2.3 mi).
Date & time: 12 Mar 2021 07:43:02 UTC -
Local time at epicenter: Friday, 12 Mar 2021 7:43 am (GMT +0)
Magnitude: 5
Depth: 3.7 km
Epicenter latitude / longitude: 63.876°N / 22.297°W
(Iceland)Nearest volcano: Fagradalsfjall (3 km / 2 mi)
Nearby towns and cities:
8 km (5 mi) ENE of Grindavik (pop: 2,860) --> See nearby quakes!
19 km (12 mi) SE of Reykjanesbaer (pop: 2,010) --> See nearby quakes!
28 km (17 mi) SW of Hafnarfjordur (pop: 26,800) --> See nearby quakes!
30 km (19 mi) SW of Garðabaer (pop: 11,400) --> See nearby quakes!
32 km (20 mi) SW of Kopavogur (pop: 31,700) --> See nearby quakes!
35 km (22 mi) SW of Reykjavik (pop: 118,900) --> See nearby quakes!
43 km (27 mi) SW of Mosfellsbaer (pop: 8,650) --> See nearby quakes!
45 km (28 mi) W of Thorlakshofn (pop: 1,490) --> See nearby quakes!
51 km (32 mi) SSW of Akranes (pop: 6,610) --> See nearby quakes!
56 km (35 mi) WSW of Hveragerdi (pop: 2,290) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds
1.5°C (35 F), humidity: 80%, wind: 12 m/s (23 kts) from NNE
Primary data source: IMO (Icelandic Met Office)Broken Clouds
1.5°C (35 F), humidity: 80%, wind: 12 m/s (23 kts) from NNEEstimated released energy: 2 x 1012 joules (554 megawatt hours, equivalent to 477 tons of TNT) More info
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 |
| 5.0 | 3.7 km | 3.1 Km SSW of Fagradalsfjall, Iceland | IMO |
User reports for this quake (16)
User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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93 km E of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
283.4 km NE of epicenter [Map] / not felt : Akureyri (reported through our app)
Sandgerdi / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
Kópavogur / Moderate shaking (MMI V) / single vertical bump / 1-2 s
12.5 km NNW of epicenter [Map] / Moderate shaking (MMI V) / both vertical and horizontal swinging / 5-10 s (reported through our app)
Reykjavik / Light shaking (MMI IV)
Ásbrú, Reykjanes Peninsula (16.6 km NW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s (reported through our app)
16.6 km NW of epicenter [Map] / Light shaking (MMI IV) / 1-2 s
28.9 km NE of epicenter [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 2-5 s (reported through our app)
Reykjanesbaer / Moderate shaking (MMI V) / both vertical and horizontal swinging / 2-5 s
reykjavik / Moderate shaking (MMI V) / vertical swinging (up and down) / 5-10 s
93 km E of epicenter [Map] / Light shaking (MMI IV) (reported through our app)
18.3 km NW of epicenter [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s (reported through our app)
Keflavik / Light shaking (MMI IV) / 2-5 s
15.1 km NW of epicenter [Map] / Moderate shaking (MMI V) (reported through our app)
Njarðvík / Light shaking (MMI IV) / rattling, vibrating
Earlier earthquakes in the same area
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