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Moderate mag. 4.5 earthquake - 1.3 km west of Petkovac, Town of Petrinja, Sisak-Moslavina, Croatia, on Saturday, Jan 9, 2021 at 10:29 pm (GMT +1)

Moderate mag. 4.5 earthquake - 1.3 km west of Petkovac, Town of Petrinja, Sisak-Moslavina, Croatia, on Saturday, Jan 9, 2021 at 10:29 pm (GMT +1) Moderate mag. 4.5 earthquake - 1.3 km west of Petkovac, Town of Petrinja, Sisak-Moslavina, Croatia, on Saturday, Jan 9, 2021 at 10:29 pm (GMT +1)

Moderate magnitude 4.5 earthquake at 10 km depth

9 Jan 21:31 UTC: First to report: VolcanoDiscovery after 2 minutes.
9 Jan 21:35: Magnitude recalculated from 4.9 to 4.5. Epicenter location corrected by 2.7 km (1.7 mi) towards NW.
9 Jan 21:37: Now using data updates from EMSC
9 Jan 21:45: Epicenter location corrected by 1.1 km (0.7 mi) towards N.

Earthquake details

Date & timeJan 9, 2021 21:29:09 UTC
Local time at epicenterSaturday, Jan 9, 2021 at 10:29 pm (GMT +1)
StatusConfirmed
Magnitude4.5
Depth10.0 km
Epicenter latitude / longitude45.35°N / 16.35°E (Town of Petrinja, Sisak-Moslavina, Croatia)
Antipode45.35°S / 163.65°W
Shaking intensityLight shaking
Felt808 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearby towns and cities5 km (3 mi) SE of Donja Budičina (Sisačko-Moslavačka) (pop: 236) | Show on map | Quakes nearby
11 km (7 mi) SSE of Petrinja (pop: 15,700) | Show on map | Quakes nearby
13 km (8 mi) S of Sisak (pop: 35,700) | Show on map | Quakes nearby
33 km (20 mi) SW of Popovača (Sisačko-Moslavačka) (pop: 12,000) | Show on map | Quakes nearby
36 km (23 mi) WSW of Kutina (Sisačko-Moslavačka) (pop: 14,900) | Show on map | Quakes nearby
46 km (28 mi) SSE of Velika Gorica (Zagreb) (pop: 31,600) | Show on map | Quakes nearby
57 km (35 mi) SSE of Sesvete (City of Zagreb) (pop: 52,400) | Show on map | Quakes nearby
59 km (37 mi) SSE of Zagreb (City of Zagreb) (pop: 699,000) | Show on map | Quakes nearby
63 km (39 mi) SE of Stenjevec (City of Zagreb) (pop: 41,300) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 0.1°C (32 F), humidity: 93%, wind: 1 m/s (3 kts) from NE
Estimated seismic energy released3.5 x 1011 joules (98.6 megawatt hours, equivalent to 84.8 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
4.510 km- 2 km SSE of Petrinja, CroatiaEMSC
4.110 kmCROATIAGFZ
4.710.1 kmCroatia [Land]INGV
4.88.7 km2 Km SSE of Petrinja, CroatiaUSGS
4.49 kmSisak / Kroatien, CroatiaZAMG
4.910 kmCroatiaKRZO
4.610 kmKROATIEN, CroatiaUni Köln
4.75 kmCroatia RegionNIEP

Seismograms

Seismic station: Grafenberg, Germany (GRFO/IU network) | Distance from quake: 617 km / 384 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 (855)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Jankomir, City of Zagreb (58.3 km NW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s : Felt like light couch shake of another person moving but lasted longer and was consistent so I knew then it was a quake and not my friend shaking the couch. | 2 users found this interesting.  
Jankomir, City of Zagreb (59 km NW of epicenter) [Map] / Light shaking (MMI IV) / complex rolling (tilting in multiple directions) / 15-20 s : 5. Kat Jarun, ljuljalo je dobrih 15-20 sekundi | 3 users found this interesting. (reported through our app)  
Banja Luka, Nova varoš (92.1 km SE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : Osjetila sam jedan nagli trzaj i nakon toga blago kratko podrhtavanje. | 2 users found this interesting.  
Veliki Grđevac, Bjelovarsko-Bilogorska (70.5 km NE of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s : Approaching sound of thunder then a hit and shaking for a few seconds. Creaking in the ceiling and wardrobe doors rattling.  
Zadvorsko, City of Zagreb (55.6 km NW of epicenter) [Map] / Very weak shaking (MMI II) / 2-5 s : Felt a slight shake, some cracking noises in the drywall. Cat and dog raised their heads, no further reaction.  
Križevci (75.4 km N of epicenter) [Map] / Light shaking (MMI IV) : Lagano zibanje istok - zapad, stakla na prozorima vibriraju. | One user found this interesting.  
Zagreb, Jarun / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : I was sitting in the living room, 3rd floor of the building.I felt vibrations and a slight swinging of the building.  
Zagreb, Trnsko, tower block, 10 floor / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s : A slight horizontal sway, I felt it because I was sitting down. If I was walking I would not even feel it.  
Kratko i jako zaljuljalo uz blagi tresak (57.1 km NNW of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Osjećaj kao da je kuća poskočila,i zaljuljala se kratko zveckanje posuđe | 2 users found this interesting.  
Maribor 4 nadstropje (146.2 km NNW of epicenter) [Map] / Light shaking (MMI IV) / 5-10 s : Treslo kar dolgo, zibale so se luči. | One user found this interesting.  
Karlovac (64.1 km WNW of epicenter) [Map] / Light shaking (MMI IV)
Brežice (83.5 km NW of epicenter) [Map] / Moderate shaking (MMI V) / rattling, vibrating / 1-2 s
Karlovac (64.1 km WNW of epicenter) [Map] / Weak shaking (MMI III)
Karlovac (64.1 km WNW of epicenter) [Map] / Light shaking (MMI IV)
Karlovac (64.1 km WNW of epicenter) [Map] / Light shaking (MMI IV)
Zagreb, HR.21.3186885 (58.8 km NNW of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 2-5 s
Virovitica (96.6 km NE of epicenter) [Map] / Light shaking (MMI IV) / both vertical and horizontal swinging / 2-5 s
Pécs, Baranya (164.7 km ENE of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s
Sveta Nedjelja, Zagrebačka (66.5 km NW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 1-2 s
near Sankt Lorenz, Vöcklabruck District, Upper Austria (365.2 km NW of epicenter) [Map] / not felt (reported through our app)
Nagykanizsa, Zala (132.7 km NNE of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Ivanjska (39.5 km S of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Csorna, Győr-Moson-Sopron (256.4 km NNE of epicenter) [Map] / not felt (reported through our app)
Zaprešić (70.6 km NW of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Nova Gorica (228.4 km WNW of epicenter) [Map] / Very weak shaking (MMI II) : Very weak, first l wasn't sure about quake then l saw the app. (reported through our app)  
Ljubljana (167 km WNW of epicenter) [Map] / not felt (reported through our app)
Derventa, Srpska (128.4 km ESE of epicenter) [Map] / Light shaking (MMI IV)
Litzelsdorf, Oberwart District, Burgenland (203.9 km N of epicenter) [Map] / not felt (reported through our app)
Trieste, Friuli Venezia Giulia (204 km W of epicenter) [Map] / not felt (reported through our app)
Sisak (15.5 km NNE of epicenter) [Map] / Strong shaking (MMI VI) (reported through our app)
Krizevci (76.7 km N of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s : Krizevci, treslo se i zveckalo. (reported through our app)  
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