Moderate mag. 4.0 earthquake - 8.6 km north of Lubin, Lower Silesia, Poland, on Thursday, Dec 9, 2021 at 10:37 pm (GMT +1) -

Moderate magnitude 4.0 earthquake at 9 km depth

9 Dec 21:40 UTC: First to report: GFZ after 3 minutes.
9 Dec 21:44: Magnitude recalculated from 4.1 to 4.2. Epicenter location corrected by 1.1 km (0.7 mi) towards S.
9 Dec 22:06: Now using data updates from USGS

Update Thu, 9 Dec 2021, 21:48

Moderate magnitude 4.2 earthquake 8 km north of Lubin, Poland

4.2 quake 9 Dec 10:37 pm (GMT +1)

A magnitude 4.2 earthquake near Lubin, Lubin County, Lower Silesia, Poland, was reported only 11 minutes ago by the German Research Centre for Geosciences (GFZ), considered one of the key international agencies that monitor seismic activity worldwide. The earthquake occurred at a shallow depth of 10 km beneath the epicenter late at night on Thursday, December 9th, 2021, at 10:37 pm local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
Our monitoring service identified a second report from the European-Mediterranean Seismological Centre (EMSC) which listed the quake at magnitude 3.8.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Rudna (pop. 1,600) located 5 km from the epicenter, and Lubin (pop. 77,500) 8 km away, the quake should have been felt as light shaking.
Weak shaking might have been felt in Polkowice (pop. 21,600) located 11 km from the epicenter, Głogow (pop. 68,500) 23 km away, and Legnica (pop. 106,000) 29 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Złotoryja (pop. 16,600) located 44 km from the epicenter, Jawor (pop. 23,900) 47 km away, Leszno (pop. 63,600) 48 km away, and Breslau (pop. 634,900) 70 km away.

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Earthquake data

Earthquake details

Date & time	Dec 9, 2021 21:37:32 UTC -
Local time at epicenter	Thursday, Dec 9, 2021 at 10:37 pm (GMT +1)
Status	Confirmed
Magnitude	4
Depth	8.8 km
Epicenter latitude / longitude	51.4771°N / 16.22°E (Lubin County, Lower Silesia, Poland)
Antipode	51.477°S / 163.78°W
Shaking intensity	Light shaking
Felt	31 reports
Primary data source	USGS (United States Geological Survey)
Nearest volcano	###NEARESTVOLCANO2###
Nearby towns and cities	5 km (3 mi) SW of Rudna (pop: 1,620) \| Show on map \| Quakes nearby 9 km (5 mi) N of Lubin (pop: 77,500) \| Show on map \| Quakes nearby 11 km (7 mi) ESE of Polkowice (polkowicki) (pop: 21,600) \| Show on map \| Quakes nearby 23 km (14 mi) SSE of Glogow (pop: 68,500) \| Show on map \| Quakes nearby 30 km (19 mi) N of Legnica (pop: 106,000) \| Show on map \| Quakes nearby 44 km (27 mi) NNE of Goldberg (Złotoryja County, Woiwodschaft Niederschlesien) (pop: 16,600) \| Show on map \| Quakes nearby 47 km (29 mi) SSW of Leszno (Greater Poland) (pop: 63,600) \| Show on map \| Quakes nearby 47 km (29 mi) N of Jawor (pop: 23,900) \| Show on map \| Quakes nearby 70 km (44 mi) NW of Breslau (pop: 634,900) \| Show on map \| Quakes nearby 340 km (211 mi) WSW of Warszawa (Mazovia) (pop: 1,702,100) \| Show on map \| Quakes nearby
Weather at epicenter at time of quake	Light Snow -1.4°C (29 F), humidity: 99%, wind: 1 m/s (2 kts) from SSE
Estimated seismic energy released	6.3 x 10¹⁰ joules (17.5 megawatt hours, equivalent to 15.1 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
4.0	8.8 km	4 Km SW of Rudna, Poland	USGS
4.0	5 km	POLAND	EMSC
4.0	8.8 km	Poland	RaspberryShake
4.2	10 km	Poland	GFZ

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User reports for this quake (36)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.

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Osiek (13 km S of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Lampa sufitowa bujala sie na boki i drżała szafa | 7 users found this interesting.

Lubin / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : IT took about 5 seconds. All the furniture was shaking, ceiling lamps were swinging, glass elements were making vibrating noises. | 6 users found this interesting.

Lubin / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s : From the 30 years first time that strong | 7 users found this interesting.

Lubin / Strong shaking (MMI VI) / both vertical and horizontal swinging / 5-10 s : I felt like building is going to fall | 5 users found this interesting.

Lubin (8.2 km SSW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 10-15 s : I was sitting in front of my PC, and I felt it strong | 4 users found this interesting.

Poland (8.7 km SSW of epicenter) [Map] / Weak shaking (MMI III) : Wstrząs górniczy | 3 users found this interesting.

Lubin / Strong shaking (MMI VI) / horizontal (sideways) swinging / 5-10 s : I was sleeping and weik up | 3 users found this interesting.

Kowale-Popiele, Wrocław, Lower Silesia (72.6 km ESE of epicenter) [Map] / not felt (reported through our app)

Lubin, Przylesie (10.2 km S of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 2-5 s

Lubin (10.2 km S of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 30-60 s

Lubin (6.6 km S of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s

Osiek, Lubin County, Lower Silesia (14.4 km SSE of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 2-5 s

Lubin, Lower Silesia (5.7 km SSE of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 5-10 s

Lubin leszczynowa (8.6 km SSW of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s

Stara Rudna (4.7 km ENE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s

Osiek, Lubin County, Lower Silesia (10.6 km S of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s

Lubin (7.8 km SSW of epicenter) [Map] / Light shaking (MMI IV) / 5-10 s

Lubin (8.3 km SSW of epicenter) [Map] / Light shaking (MMI IV)

Warszawa / not felt (reported through our app)

orla, lubin / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s

Berlin / not felt (reported through our app)

Koblenz. Leichte Wellenbewegung / Weak shaking (MMI III) / simple rolling (tilting sideways along one direction) / 1-2 s : Wellenartiges Heben und Senken.

Lubin / Light shaking (MMI IV) / both vertical and horizontal swinging / 2-5 s

Lubin / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s

Nowa Wieś Lubińska / not felt

Lubin / Strong shaking (MMI VI) / rattling, vibrating / 10-15 s (reported through our app)

Rynarcice / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s

Lubin / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s

Lubin / Weak shaking (MMI III) / 1-2 s

Lubin / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s

Lubin / Light shaking (MMI IV) / both vertical and horizontal swinging / 5-10 s

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