Light mag. 3.6 earthquake - Polkowice County, 2.4 km northwest of Rudna, Lubin County, Lower Silesia, Poland, on Thursday, 21 Jan 2021 6:10 am (GMT +1) -

Light mag. 3.6 earthquake - Polkowice County, 2.4 km northwest of Rudna, Lubin County, Lower Silesia, Poland, on Thursday, 21 Jan 2021 6:10 am (GMT +1)

Light magnitude 3.6 earthquake at 10 km depth

21 Jan 05:13 UTC: First to report: GFZ after 3 minutes.
21 Jan 05:17: Magnitude recalculated from 3.5 to 3.6. Epicenter location corrected by 1.3 km (0.8 mi) towards NNW.
Update Thu, 21 Jan 2021, 05:18
Small magnitude 3.6 earthquake 2 km northwest of Rudna, Poland
3.6 quake 21 Jan 6:10 am (GMT +1)
3.6 quake 21 Jan 6:10 am (GMT +1)
A shallow magnitude 3.6 earthquake was reported early morning near Rudna, Lubin County, Lower Silesia, Poland.
According to the German Research Centre for Geosciences (GFZ), the quake hit on Thursday 21 January 2021 at 6:10 am local time at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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 3.6 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Rudna (pop. 1,600) located 2 km from the epicenter, Grębocice (pop. 1,500) 10 km away, Polkowice (pop. 21,600) 13 km away, and Lubin (pop. 77,500) 15 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Ścinawa (pop. 5,900) located 18 km from the epicenter, Głogow (pop. 68,500) 19 km away, Legnica (pop. 106,000) 36 km away, and Leszno (pop. 63,600) 41 km away. In Breslavia (pop. 634,900, 72 km away), the quake was probably not felt.
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Earthquake data:

Date & time: 21 Jan 2021 05:10:40 UTC -
Local time at epicenter: Thursday, 21 Jan 2021 6:10 am (GMT +1)
Magnitude: 3.6
Depth: 10.0 km
Epicenter latitude / longitude: 51.53°N / 16.25°E (Polkowice County, Lower Silesia, Poland)
Nearby towns and cities:
2 km (2 mi) NNW of Rudna (pop: 1,620) --> See nearby quakes!
13 km (8 mi) ENE of Polkowice (polkowicki) (pop: 21,600) --> See nearby quakes!
15 km (9 mi) NNE of Lubin (pop: 77,500) --> See nearby quakes!
19 km (12 mi) SE of Głogow (pop: 68,500) --> See nearby quakes!
25 km (15 mi) SW of Gora (górowski) (pop: 12,700) --> See nearby quakes!
36 km (22 mi) N of Legnica (pop: 106,000) --> See nearby quakes!
41 km (26 mi) SSW of Leszno (Greater Poland) (pop: 63,600) --> See nearby quakes!
48 km (30 mi) SE of Nowa Sol (Lubusz) (pop: 40,400) --> See nearby quakes!
72 km (45 mi) NW of Wroclaw (pop: 634,900) --> See nearby quakes!
336 km (209 mi) WSW of Warsaw (Mazovia) (pop: 1,702,100) --> See nearby quakes!
Weather at epicenter at time of quake:
Clear Sky 3.9°C (39 F), humidity: 81%, wind: 4 m/s (7 kts) from SSE
Primary data source: GFZ (German Research Centre for Geosciences)
Estimated released energy: 1.6 x 1010 joules (4.4 megawatt hours, equivalent to 3.79 tons of TNT) More info
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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
3.610 kmPolandGFZ
3.610 km3.6 POLANDEMSC

User reports for this quake (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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near Sandau, Česká Lípa District, Liberecký kraj (163 km WSW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 15-20 s : High resonantion of house cca 6:35am (same as very loud big subwoofer +- 20-30hz? 10-20s) Feel in body  
Lubin, Lower Silesia (8.6 km S of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 1-2 s
Lubin / Weak shaking (MMI III) / 5-10 s
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