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Moderate mag. 4.1 earthquake - 10.4 km south of Glogow, Lower Silesia, Poland, on Thursday, Mar 11, 2021 at 7:59 am (GMT +1)

Moderate mag. 4.1 earthquake - 10.4 km south of Glogow, Lower Silesia, Poland, on Thursday, Mar 11, 2021 at 7:59 am (GMT +1) Moderate mag. 4.1 earthquake - 10.4 km south of Glogow, Lower Silesia, Poland, on Thursday, Mar 11, 2021 at 7:59 am (GMT +1)

Moderate magnitude 4.1 earthquake at 1 km depth

11 Mar 07:01 UTC: First to report: GFZ after 2 minutes.
11 Mar 07:17: Magnitude recalculated from 3.5 to 4.1. Epicenter location corrected by 4.3 km (2.7 mi) towards NE.
11 Mar 08:33: Hypocenter depth recalculated from 10.0 to 1.0 km (from 6.2 to 0.6 mi). Epicenter location corrected by 5.7 km (3.6 mi) towards SSW.
Update Thu, 11 Mar 2021, 07:06

Small magnitude 3.5 earthquake 8 km south of Głogow, Poland

3.5 quake 11 Mar 7:59 am (GMT +1)
3.5 quake 11 Mar 7:59 am (GMT +1)
Just 7 minutes ago, a 3.5-magnitude earthquake struck near Głogow, Lower Silesia, Poland. The tremor was recorded in the morning on Thursday 11 March 2021 at 7:59 am local time, at a shallow depth of 10 km below the surface.
The event was filed by the German Research Centre for Geosciences (GFZ), the first seismological agency to report it.
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 Jerzmanowa (pop. 600) located 2 km from the epicenter, Głogow (pop. 68,500) 8 km away, and Polkowice (pop. 21,600) 10 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Lubin (pop. 77,500) located 23 km from the epicenter, Nowa Sol (pop. 40,400) 34 km away, Legnica (pop. 106,000) 43 km away, Leszno (pop. 63,600) 45 km away, and Bolesławiec (pop. 40,700) 50 km away. In Breslavia (pop. 634,900, 86 km away), the quake was probably not felt.

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Earthquake details

Date & timeMar 11, 2021 06:59:03 UTC
Local time at epicenterThursday, Mar 11, 2021 at 7:59 am (GMT +1)
StatusConfirmed
Magnitude4.1
Depth1.0 km
Epicenter latitude / longitude51.57°N / 16.09°E (Polkowice County, Lower Silesia, Poland)
Antipode51.57°S / 163.91°W
Shaking intensityLight shaking
Felt5 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearby towns and cities4 km (3 mi) SE of Jerzmanowa (pop: 600) | Show on map | Quakes nearby
7 km (5 mi) N of Polkowice (polkowicki) (pop: 21,600) | Show on map | Quakes nearby
10 km (6 mi) S of Glogow (pop: 68,500) | Show on map | Quakes nearby
20 km (13 mi) NNW of Lubin (pop: 77,500) | Show on map | Quakes nearby
37 km (23 mi) SE of Nowa Sol (Lubusz) (pop: 40,400) | Show on map | Quakes nearby
40 km (25 mi) N of Legnica (pop: 106,000) | Show on map | Quakes nearby
45 km (28 mi) SW of Leszno (Greater Poland) (pop: 63,600) | Show on map | Quakes nearby
50 km (31 mi) NE of Bolesławiec (pop: 40,700) | Show on map | Quakes nearby
84 km (52 mi) NW of Breslau (pop: 634,900) | Show on map | Quakes nearby
346 km (215 mi) W of Warszawa (Mazovia) (pop: 1,702,100) | Show on map | Quakes nearby
Weather at epicenter at time of quakeSnow 1.3°C (34 F), humidity: 53%, wind: 5 m/s (11 kts) from S
Estimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 tons of TNT) | about seismic energy
Show interactive Map
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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
4.11 kmPolandGFZ
4.110 kmPOLANDEMSC

Seismograms

Seismic station: Grafenberg, Germany (GRFO/IU network) | Distance from quake: 402 km / 250 mi | Show on map | Station Info
Seismic station Grafenberg, Germany: vertical movement plot around time of quake (source: IRIS/BUD)
Seismogram (vertical component) around time of quake. Thin dotted red line indicates time of quake. Seismic waves arrive some time later, depending on distance. Source: IRIS Buffer of Uniform Data (BUD) webtool
Show more

User reports for this quake (15)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Translate
9.2 km N of epicenter [Map] / Weak shaking (MMI III) / single lateral shake / 2-5 s : Bujanie żyrandoli w Głogowie. Wyczuwalne podczas leżenia w łóżku. | 4 users found this interesting.  
211.2 km E of epicenter [Map] / not felt : Nie odczuwalny. | One user found this interesting. (reported through our app)  
Hochkirch, Saxony (116.9 km WSW of epicenter) [Map] / not felt (reported through our app)
209.6 km WNW of epicenter [Map] / not felt (reported through our app)
220.1 km WNW of epicenter [Map] / not felt (reported through our app)
213.6 km WNW of epicenter [Map] / not felt (reported through our app)
Staßfurt (308.9 km W of epicenter) [Map] / not felt (reported through our app)
Głogów / Weak shaking (MMI III)
348.9 km ENE of epicenter [Map] / not felt (reported through our app)
Potsdam (228.7 km WNW of epicenter) [Map] / not felt (reported through our app)
377.2 km S of epicenter [Map] / not felt (reported through our app)
Kitzingen, Germany (466.6 km WSW of epicenter) [Map] / Weak shaking (MMI III)
66.3 km W of epicenter [Map] / not felt (reported through our app)
Stara Rzeka / Light shaking (MMI IV) / 2-5 s
Polkowice (7.5 km SSW of epicenter) [Map] / Moderate shaking (MMI V) / 1-2 s

Earlier earthquakes in the same area

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