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Moderate mag. 4.7 earthquake - 2.8 Km NE of Fagradalsfjall, Iceland, on Sunday, Feb 28, 2021 at 12:19 am (GMT +0) -

This quake was likely an aftershock of the 5.7 quake 3.0 Km S of Hella, Iceland, Feb 24, 2021 10:05 am (GMT +0), which had occurred 4 days earlier.
Moderate mag. 4.7 earthquake - 2.8 Km NE of Fagradalsfjall, Iceland, on Sunday, Feb 28, 2021 at 12:19 am (GMT +0) Moderate mag. 4.7 earthquake - 2.8 Km NE of Fagradalsfjall, Iceland, on Sunday, Feb 28, 2021 at 12:19 am (GMT +0)

Moderate magnitude 4.7 earthquake at 5 km depth

28 Feb 00:26 UTC: First to report: GFZ after 7 minutes.
28 Feb 00:29: Now using data updates from IMO
28 Feb 00:33: Magnitude recalculated from 4.3 to 5.1. Hypocenter depth recalculated from 5.0 to 5.3 km (from 3.1 to 3.3 mi).
28 Feb 00:38: Magnitude recalculated from 5.1 to 4.7.
Update Sun, 28 Feb 2021, 03:11
Continuing quakes as the tectonic plates splitting Iceland move
Map of Iceland showing movements and deformation. (source: IMO)
Map of Iceland showing movements and deformation. (source: IMO)
The recent 4.7 earthquake which occurred 29 km southwest of Reykjavic , Iceland, was only one of the quakes which exceeded a magnitude 4.0. According to the Icelandic Meteorological Office (IMO) the ongoing earthquake swarm in Iceland produced the largest quake they have felt at magnitude 5.7, last 24 Feb. 2021. Since that quake they have recorded 20+ quakes above magnitude 4.0, and 100+ quakes above magnitude 3.0. A total of over 7,200 quakes were recorded since the start of the swarm last 19 Feb. 2021.
The satellite image above from the Sentinel-1 interferogram spanning the period of 19-25 Feb. 2021, shows tectonic plate movements between the North American and the Eurasian Plates. Red amplitudes represent movement towards the satellite and purple amplitudes represent movement away from the satellite. The arrow lines show this movement direction. The red star shows the location of the magnitude 5.7 quake last 24 Feb.
The IMO stated that these seismic activities are part of the ongoing volcano-tectonic reactivation of the Reykjanes Peninsula. Although no shallow magmatic intrusions or inflow of magma have been observed yet, the IMO is on the constant lookout for them
Update Sun, 28 Feb 2021, 02:22
Moderate earthquake of magnitude 4.7 reported 29 km southwest of Reykjavik, Iceland
4.7 quake 2.8 Km NE of Fagradalsfjall, Iceland, 28 Feb 2021 12:19 am (GMT +0)
4.7 quake 2.8 Km NE of Fagradalsfjall, Iceland, 28 Feb 2021 12:19 am (GMT +0)
An earthquake with a magnitude of 4.7 hit near the Iceland capital of Reykjavik on 28 Feb. 2021, at 12:19 am local time. The quake occurred 29 km southwest of Reykjavik, at a shallow depth of 5.3 km. This quake is a part of the ongoing earthquake swarms in southwest Iceland.
Within minutes after the quake, we received numerous user reports mostly from the city of Reykjavik describing light to moderate shaking. Some of them also reported rattling of beds and windows. The quake should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
Our monitoring service identified a second report from the United States Geological Survey which listed the quake at magnitude 4.6. Other agencies reporting the same quake include the German Research Centre for Geosciences (GFZ) at magnitude 4.2, and the European-Mediterranean Seismological Centre (EMSC) at magnitude 4.6.
The quake was felt in Vogar (pop. 1000) located 10 km from the epicenter, Hafnarfjordur (pop. 26,800) 22 km away, Hafnarfjörður (pop. 26,800) 22 km away, Garðabaer (pop. 11,400) 24 km away, and Garðabær (pop. 11,400) 24 km away, Kopavogur (pop. 31,700) located 26 km from the epicenter, Seltjarnarnes (pop. 4,300) 28 km away, Reykjavik (pop. 118,900) 29 km away, Mosfellsbaer (pop. 8,700) 38 km away, and Mosfellsbær (pop. 8,700) 38 km away.

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Earthquake data

Date & time: Feb 28, 2021 00:19:14 UTC -
Local time at epicenter: Sunday, Feb 28, 2021 at 12:19 am (GMT +0)
Magnitude: 4.7
Depth: 5.3 km
Epicenter latitude / longitude: 63.92°N / 22.233°W (Reykjavik, Capital Region, Iceland)
Antipode: 63.92°S / 157.767°E
Nearest volcano: Krísuvík (7 km / 4 mi)
Nearby towns and cities:
10 km (6 mi) SE of Vogar (Southern Peninsula) (pop: 1,030) --> See nearby quakes!
14 km (8 mi) NE of Grindavik (Southern Peninsula) (pop: 2,860) --> See nearby quakes!
22 km (14 mi) SW of Hafnarfjordur (pop: 26,800) --> See nearby quakes!
24 km (15 mi) SW of Garðabaer (pop: 11,400) --> See nearby quakes!
26 km (16 mi) SW of Kopavogur (pop: 31,700) --> See nearby quakes!
27 km (17 mi) ESE of Sangerdhi (Southern Peninsula) (pop: 1,550) --> See nearby quakes!
29 km (18 mi) SW of Reykjavik (pop: 118,900) --> See nearby quakes!
38 km (23 mi) SW of Mosfellsbaer (pop: 8,650) --> See nearby quakes!
42 km (26 mi) W of Thorlakshofn (South) (pop: 1,490) --> See nearby quakes!
45 km (28 mi) S of Akranes (West) (pop: 6,610) --> See nearby quakes!
Weather at epicenter at time of quake:
Light Rain 4.5°C (40 F), humidity: 70%, wind: 17 m/s (33 kts) from SSW
Primary data source: IMO (Icelandic Met Office)
Estimated released energy: 7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) | about seismic energy
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
If you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable to earthquake science, seismic 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.
Mag.DepthLocationSource
4.75.3 km2.8 Km NE of Fagradalsfjall, IcelandIMO
4.62 kmICELANDEMSC
4.210 kmIcelandGFZ
4.610 km10 Km SW of Álftanes, IcelandUSGS

User reports for this quake (165)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Downtown Reykjavik (29.3 km NNE of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s : Was lying in bed in my 4th floor apartment when everything started to shake. The cat woke up as well. Felt little long like few seconds. Made me very nervous | One user found this interesting.  
Reykjanesbaer, Southern Peninsula (17.3 km WNW of epicenter) [Map] / Weak shaking (MMI III) : House rattled. Step son got over excited. | One user found this interesting. (reported through our app)  
Reykjavik / Moderate shaking (MMI V) / horizontal (sideways) swinging / 1-2 s : Happened at around 1:30Am. Was laying in bed and falling asleep when suddenly the entire bed shook. I could hear my glassware knocking hard against each other.  
Njarðvik / Light shaking (MMI IV) / horizontal (sideways) swinging : Was lying on the bed , the bed rattle and fell like on the ship passing a big wave | One user found this interesting.  
Vesturbaer Reykjavik / Light shaking (MMI IV) / 2-5 s : Shelving units moved. Windows were shaking as well | One user found this interesting.  
Reikiavik, Reykjavíkurborg, Capital Region (29.6 km NNE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s
Vogar (9.9 km NW of epicenter) [Map] / Moderate shaking (MMI V) / 1-2 s
Kopavogur, Capital Region (26.3 km NE of epicenter) [Map] / Strong shaking (MMI VI) / 5-10 s
Reikiavik, Reykjavíkurborg, Capital Region (28.8 km NE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s : Rumble and light shaking.  
Reikiavik, Reykjavíkurborg, Capital Region (30.6 km NE of epicenter) [Map] / Light shaking (MMI IV)
Reikiavik, Reykjavíkurborg, Capital Region (27.6 km NNE of epicenter) [Map] / Moderate shaking (MMI V) / 2-5 s
Reikiavik, Reykjavíkurborg, Capital Region (29.2 km NE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 1-2 s (reported through our app)
Reikiavik, Reykjavíkurborg, Capital Region (28.1 km NNE of epicenter) [Map] / Moderate shaking (MMI V)
Reikiavik, Reykjavíkurborg, Capital Region (29.8 km NE of epicenter) [Map] / Moderate shaking (MMI V) / 2-5 s
Reykjanesbaer, Southern Peninsula (18.5 km WNW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Vogar, Sveitarfélagið Vogar, Southern Peninsula (9.6 km NW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Reykjanesbaer, Southern Peninsula (16.7 km WNW of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Seltjarnarnes, Capital Region (29 km NNE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Reikiavik, Reykjavíkurborg, Capital Region (28.8 km NNE of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Reikiavik, Reykjavíkurborg, Capital Region (29 km NNE of epicenter) [Map] / Very strong shaking (MMI VII) (reported through our app)
Reikiavik, Reykjavíkurborg, Capital Region (29.6 km NE of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 5-10 s
Kopavogur, Capital Region (27.1 km NNE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Reykjavik (34.5 km NE of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s (reported through our app)
Reikiavik, Reykjavíkurborg, Capital Region (29.3 km NNE of epicenter) [Map] / Strong shaking (MMI VI)
Hafnarfjordur, Capital Region (20.2 km NE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Grindavik, Southern Peninsula (13.7 km SW of epicenter) [Map] / Moderate shaking (MMI V) / 10-15 s (reported through our app)
Reikiavik, Reykjavíkurborg, Capital Region (28.5 km NNE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Reykjavik, Hrafnhólar (29.4 km NE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Reykjanesbaer, Southern Peninsula (16.8 km WNW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s
Hafnarfjordur, Capital Region (20.2 km NE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Reykiavik (28.6 km NE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
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