Quake Info: 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 & time	Mar 7, 2021 02:50:43 UTC
Local time at epicenter	Sunday, Mar 7, 2021 at 2:50 am (GMT +0)
Status	Confirmed
Magnitude	4.1
Depth	2.3 km
Epicenter latitude / longitude	63.873°N / 22.425°W (Grindavikurbær, Southern Peninsula, Iceland)
Antipode	63.873°S / 157.575°E
Shaking intensity	Light shaking
Felt	9 reports
Primary data source	IMO (Icelandic Met Office)
Nearest volcano	Reykjanes (5 km / 3 mi)
Nearby towns and cities	4 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 quake	Broken Clouds 3.3°C (38 F), humidity: 93%, wind: 1 m/s (2 kts) from W
Estimated seismic energy released	8.9 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.	Depth	Location	Source
4.1	2.3 km	4.0 Km N of Grindavík, Iceland	IMO
4.4	2 km	ICELAND REGION	EMSC
4.4	10 km	5 Km NE of Reykjanesbær, Iceland	USGS
4.2	10 km	Iceland	GFZ

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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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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

Earthquake details

Data for the same earthquake reported by different agencies

User reports for this quake (9)

Earlier earthquakes in the same area