Moderate mag. 4.1 earthquake - 4.0 Km N of Grindavík, Iceland, on Sunday, Mar 7, 2021 at 2:50 am (GMT +0)

This quake was likely an aftershock of the 5.0 quake 3.2 km WSW of Fagradalsfjall, Reykjanes peninsula, Iceland, Mar 7, 2021 2:01 am (GMT +0), which had occurred 49 minutes earlier.
Moderate mag. 4.1 earthquake - 4.0 Km N of Grindavík, Iceland, on Sunday, Mar 7, 2021 at 2:50 am (GMT +0) Moderate mag. 4.1 earthquake - 4.0 Km N of Grindavík, Iceland, on Sunday, Mar 7, 2021 at 2:50 am (GMT +0)

Moderate magnitude 4.1 earthquake at 2 km depth

7 Mar 02:54 UTC: First to report: EMSC after 4 minutes.
7 Mar 02:55: Magnitude recalculated from 3.5 to 3.9. Epicenter location corrected by 1.1 km (0.7 mi) towards S.
... [show all] ...
7 Mar 03:10: Magnitude recalculated from 3.9 to 4.1. Hypocenter depth recalculated from 2.5 to 2.3 km (from 1.6 to 1.4 mi).

Earthquake details

Date & timeMar 7, 2021 02:50:43 UTC
Local time at epicenterSunday, Mar 7, 2021 at 2:50 am (GMT +0)
StatusConfirmed
Magnitude4.1
Depth2.3 km
Epicenter latitude / longitude63.873°N / 22.425°W (Grindavikurbær, Southern Peninsula, Iceland)
Antipode63.873°S / 157.575°E
Shaking intensityLight shaking
Felt9 reports
Primary data sourceIMO (Icelandic Met Office)
Nearest volcanoReykjanes (5 km / 3 mi)
Nearby towns and cities4 km (2 mi) N of Grindavik (pop: 2,860) | Show on map | Quakes nearby
15 km (10 mi) SSE of Reykjanesbær (Penisola meridionale) (pop: 2,010) | Show on map | Quakes nearby
32 km (20 mi) SW of Hafnarfjordur (Capital Region) (pop: 26,800) | Show on map | Quakes nearby
34 km (21 mi) SW of Garðabaer (Capital Region) (pop: 11,400) | Show on map | Quakes nearby
36 km (23 mi) SW of Kopavogur (Capital Region) (pop: 31,700) | Show on map | Quakes nearby
39 km (24 mi) SW of Reykjavik (Capital Region) (pop: 118,900) | Show on map | Quakes nearby
48 km (30 mi) SW of Mosfellsbaer (Capital Region) (pop: 8,650) | Show on map | Quakes nearby
51 km (32 mi) W of Thorlakshofn (South) (pop: 1,490) | Show on map | Quakes nearby
53 km (33 mi) SSW of Akranes (West) (pop: 6,610) | Show on map | Quakes nearby
62 km (39 mi) WSW of Hveragerdi (South) (pop: 2,290) | Show on map | Quakes nearby
Weather at epicenter at time of quakeBroken Clouds 3.3°C (38 F), humidity: 93%, wind: 1 m/s (2 kts) from W
Estimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | about seismic energy
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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.
Mag.DepthLocationSource
4.12.3 km4.0 Km N of Grindavík, IcelandIMO
4.42 kmICELAND REGIONEMSC
4.410 km5 Km NE of Reykjanesbær, IcelandUSGS
4.210 kmIcelandGFZ

User reports for this quake (9)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Keflavik (15.4 km NNW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Reykjanesbaer, Southern Peninsula (12.8 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / 2-5 s
Garðabaer, Capital Region (35.2 km NE of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Ásbrú (12.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s (reported through our app)
Ásbrú (12.8 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s (reported through our app)
Kopavogur, Capital Region (38.2 km NE of epicenter) [Map] / Weak shaking (MMI III) / 1-2 s
Reikiavik, Reykjavíkurborg, Capital Region (40.6 km NE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Reykjanesbaer, Southern Peninsula (12.8 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / 2-5 s
Mossfellsbær / Light shaking (MMI IV) / rattling, vibrating / very short
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