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Moderate mag. 4.1 earthquake - Sisak-Moslavina, 37 km southeast of Zagreb, Croatia, on Thursday, Sep 23, 2021 at 1:32 am (GMT +2) -

Moderate mag. 4.1 earthquake - Sisak-Moslavina, 37 km southeast of Zagreb, Croatia, on Thursday, Sep 23, 2021 at 1:32 am (GMT +2) Moderate mag. 4.1 earthquake - Sisak-Moslavina, 37 km southeast of Zagreb, Croatia, on Thursday, Sep 23, 2021 at 1:32 am (GMT +2)

Moderate magnitude 4.1 earthquake at 2 km depth

22 Sep 23:34 UTC: First to report: GFZ after 2 minutes.
22 Sep 23:36: Now using data updates from EMSC
22 Sep 23:41: Epicenter location corrected by 0.8 km (0.5 mi) towards W.

Earthquake details

Date & timeSep 22, 2021 23:32:24 UTC -
Local time at epicenterThursday, Sep 23, 2021 at 1:32 am (GMT +2)
StatusConfirmed
Magnitude4.1
Depth2.0 km
Epicenter latitude / longitude45.54°N / 16.25°E (Municipality of Lekenik, Sisak-Moslavina, Croatia)
Antipode45.54°S / 163.75°W
Shaking intensityLight shaking
Felt34 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearby towns and cities1 km (1 mi) ENE of Dužica (Sisačko-Moslavačka) (pop: 353) | Show on map | Quakes nearby
12 km (7 mi) NNW of Petrinja (pop: 15,700) | Show on map | Quakes nearby
13 km (8 mi) NW of Sisak (pop: 35,700) | Show on map | Quakes nearby
23 km (15 mi) SE of Velika Gorica (Zagreb) (pop: 31,600) | Show on map | Quakes nearby
34 km (21 mi) SSE of Sesvete (City of Zagreb) (pop: 52,400) | Show on map | Quakes nearby
37 km (23 mi) SE of Zagreb (City of Zagreb) (pop: 699,000) | Show on map | Quakes nearby
41 km (26 mi) SE of Stenjevec (City of Zagreb) (pop: 41,300) | Show on map | Quakes nearby
49 km (31 mi) SE of Zapresic (Općina Zaprešić, Zagrebačka) (pop: 19,700) | Show on map | Quakes nearby
51 km (31 mi) SE of Samobor (Zagrebačka) (pop: 16,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeBroken Clouds 9.8°C (50 F), humidity: 94%, wind: 1 m/s (2 kts) from WNW
Estimated seismic energy released8.9 x 1010 joules (24.8 megawatt hours, equivalent to 21.3 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.DepthLocationSource
4.12 kmCROATIAEMSC
4.010 kmCROATIAGFZ
3.910 kmCroatiaKRZO
3.910 kmBosnia & Herzegovina: Bosnia And Herz. [Land]INGV
3.65 kmCroatia RegionNIEP
3.810 kmCroatia: Sisak / KroatienZAMG
3.710 kmCroatia: NWUni Köln

Seismograms

Seismic station: Grafenberg, Germany (GRFO/IU network) | Distance from quake: 596 km / 370 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
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User reports for this quake (41)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Galdovacka ulica 109, Sisak (13.9 km ESE of epicenter) [Map] / Moderate shaking (MMI V) / 5-10 s : Terrible sound. everything moving. | 6 users found this interesting.  
Sisak (12.2 km SE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s : Shaking with thundering sound up to 15sec | 5 users found this interesting.  
Mošćenica, Town of Petrinja, Sisačko-Moslavačka (13.3 km SE of epicenter) [Map] / Moderate shaking (MMI V) / complex rolling (tilting in multiple directions) / 10-15 s : Strong shaking, long! | 3 users found this interesting.  
Sisak (11.8 km SE of epicenter) [Map] / not felt : On the 4th floor of a building, loud sound, shaking for about 3-4 sec | 3 users found this interesting.  
Petrinja / Moderate shaking (MMI V) / vibration and rolling / 2-5 s : It woke me up and I was ready to jump up, but it didn't last long, fortunately. It seems we are getting used to it... | 2 users found this interesting.  
Trieste / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Scuotimento leggero. Svegliata dalla scossa perché un mobiletto appoggiato al muro ha iniziato a fare rumore ma ho il sonno leggero. | 2 users found this interesting. (reported through our app)  
Budaševo, City of Sisak, Sisačko-Moslavačka (12.3 km ESE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : : | 2 users found this interesting.  
Novi Zagreb (34.6 km NW of epicenter) [Map] / not felt : Did not feel anything | One user found this interesting.  
Prijedor (71.5 km SSE of epicenter) [Map] / not felt / rattling, vibrating / 2-5 s : Vibrations and shaking. | One user found this interesting.  
Sisak (9.4 km ESE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s | One user found this interesting.
Zapresić / not felt : Nothing in Zaprešić | One user found this interesting.  
Glina, kroatien (29.8 km SSW of epicenter) [Map] / Light shaking (MMI IV) : Bett hat gewackelt  
Klagenfurt, Carinthia (192.3 km NW of epicenter) [Map] / not felt (reported through our app)
Petrinja, Sisačko-Moslavačka (11.4 km SSE of epicenter) [Map] / Moderate shaking (MMI V) / vertical swinging (up and down) / 5-10 s (reported through our app)
Sisak, Sisačko-Moslavačka (10.1 km SE of epicenter) [Map] / Moderate shaking (MMI V) / complex rolling (tilting in multiple directions) / 10-15 s (reported through our app)
Sisak, Sisačko-Moslavačka (5.4 km SE of epicenter) [Map] / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s (reported through our app)
Petrinja, Sisačko-Moslavačka (14.2 km S of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 2-5 s (reported through our app)
Sisak, Sisačko-Moslavačka (9.6 km ESE of epicenter) [Map] / Moderate shaking (MMI V)
Prebold / Very weak shaking (MMI II) / single vertical bump / 1-2 s : I was just sleeping and then I woke up and felt a bump. Pretty scarry and I couldn't sleep after.  
Sisak / Weak shaking (MMI III)
Desno Trebarjevo / Light shaking (MMI IV) / rattling, vibrating / 2-5 s (reported through our app)
Sisak, željezara / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s : Buđenjeeeeee (reported through our app)  
Sisak / Light shaking (MMI IV)
Rab / not felt
Petrinja / Light shaking (MMI IV) / 1-2 s
Graz / not felt (reported through our app)
Petrinja / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s (reported through our app)
Sisak / Moderate shaking (MMI V) / both vertical and horizontal swinging / 2-5 s
Sisak / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s
Petrinja / Moderate shaking (MMI V) / horizontal (sideways) swinging / 5-10 s (reported through our app)
Petrinja / Moderate shaking (MMI V) / vibration and rolling / 20-30 s
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