Sismo leggero mag. 3.6 - Distretto di Polkowice, 2.4 km a nord ovest da Rudna, Polonia, giovedì, 21 gennaio 2021 -
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Sismo leggero magnitudine 3.6 at 10 km depth
21 Jan 05:13 UTC: Primo a segnalare: GFZ dopo 3 minuti.
21 Jan 05:17: Magnitudine ricalcolata da 3.5 a 3.6. Posizione dell'epicentro corretta di 1.3 km (0.8 mi) al NNW.
21 Jan 05:17: Magnitudine ricalcolata da 3.5 a 3.6. Posizione dell'epicentro corretta di 1.3 km (0.8 mi) al NNW.
Update Thu, 21 Jan 2021, 05:18
Small magnitude 3.6 earthquake 2 km northwest of Rudna, Poland3.6 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.
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.
Earthquake data:
Data & ora: 21 Jan 2021 05:10:40 UTC -
Ora locale a epicentro: giovedì, 21 gen 2021 06:10 (GMT +1)
Magnitudine: 3.6
Profondità: 10.0 km
Epicentro latitudine / longitudine: 51.53°N / 16.25°E

Nearby towns and cities:
2 km NNO da Rudna (pop: 1,620) --> Vedi sismi vicini
13 km ENE da Polkowice (polkowicki) (pop: 21,600) --> Vedi sismi vicini
15 km NNE da Lubin (pop: 77,500) --> Vedi sismi vicini
19 km SE da Głogow (pop: 68,500) --> Vedi sismi vicini
36 km N da Legnica (pop: 106,000) --> Vedi sismi vicini
41 km SSO da Leszno (Greater Poland) (pop: 63,600) --> Vedi sismi vicini
48 km SE da Nowa Sol (Lubusz) (pop: 40,400) --> Vedi sismi vicini
56 km ENE da Bolesławiec (pop: 40,700) --> Vedi sismi vicini
72 km NO da Breslavia (pop: 634,900) --> Vedi sismi vicini
336 km OSO da Varsavia (Mazovia) (pop: 1,702,100) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Clear Sky
3.9°C (39 F), humidity: 81%, wind: 4 m/s (7 kts) from SSE
Fonte dati primaria: GFZ (German Research Centre for Geosciences)Clear Sky

Stima dell'energia sismica liberata: 1.6 x 1010 joules (4.4 megawatt hours, equivalent to 3.79 tons of TNT) More info
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.
Magnitudine | Profondità | Ubicazione | Fonte |
M 3.6 | 10 km | Poland | GFZ |
M 3.6 | 10 km | 3.6 POLAND | EMSC |
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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Leave a comment if you find a particular report interesting or want to add to it.
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Send your own user report!
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
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
Earlier earthquakes in the same area since 1900
- Date / time UTC| Mag |Profondità|Age|Distanza| Details
- 06 Aug 1983 01:20| 5.8 |10km / 6.2mi|38 anni fa|21km / 13mi| 7.3 km SW of Głogow, Lower Silesia, Poland
- 31 Dec 1999 20:44| 5.4 |5km / 3.1mi|21 anni fa|17km / 10mi| 9.9 km SW of Głogow, Lower Silesia, Poland
- 25 Mar 1989 12:46| 5.3 |10km / 6.2mi|32 anni fa|17km / 11mi| 3.4 km E of Głogow, Lower Silesia, Poland
- 30 Dec 2010 08:56| 5.0 |5km / 3.1mi|10 anni fa|15km / 9mi| 3.7 km S of Polkowice, Lower Silesia, Poland
- 24 Mar 1977 07:32| 5.0 |33km / 21mi|44 anni fa|40km / 25mi| Powiat bolesławiecki, 30 km NW of Legnica, Lower Silesia, Poland
- 08 Jul 2020 05:19| 4.8 |3km / 1.9mi|33 settimane fa|15km / 9mi| 4.1 km NW of Polkowice, Lower Silesia, Poland
- 29 Jan 2019 12:53| 4.7 |10km / 6.2mi|2 anni fa|9km / 5mi| 3.7 km SW of Grębocice, Polkowice County, Lower Silesia, Poland
- 15 Sep 2018 16:35| 4.6 |2km / 1.2mi|2 anni fa|7km / 4mi| 3.4 km S of Grębocice, Polkowice County, Lower Silesia, Poland
- 05 Jul 2019 18:41| 4.5 |2km / 1.2mi|1 anno 34 settimane fa|12km / 8mi| 0.7 km SE of Polkowice, Lower Silesia, Poland
- 20 Jul 2018 03:31| 4.4 |10km / 6.2mi|3 anni fa|13km / 8mi| 6.2 km S of Głogów, Głogow County, Lower Silesia, Poland
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