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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: Arzberg, Steiermark, Austria (ARSA/OE network) | Distance from quake: 221 km / 137 mi | Show on map | Station Info
Seismic station Arzberg, Steiermark, Austria: 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. Bandpass filter applied: 0.2-10.0 Hz. 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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Našice, Osječko-Baranjska Županija (129.5 km E of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Zagreb (56.5 km NW of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Novi Zagreb (56.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s (reported through our app)
Jankomir, City of Zagreb (59.7 km NW of epicenter) [Map] / Light shaking (MMI IV) / 2-5 s (reported through our app)
Novi Zagreb (54 km NNW of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Bedekovčina, Krapinsko-Zagorska (81.8 km NNW of epicenter) [Map] / Weak shaking (MMI III)
Lonjica, Grad Vrbovec, Zagrebačka (57.1 km N of epicenter) [Map] / Weak shaking (MMI III) / rattling, vibrating / 5-10 s (reported through our app)
Ljubešćica, Varaždinska (95.7 km N of epicenter) [Map] / Weak shaking (MMI III) / 2-5 s
Donja Lomnica, Grad Velika Gorica, Zagrebačka (46.7 km NNW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s (reported through our app)
Sisak, Sisačko-Moslavačka (12.1 km NNE of epicenter) [Map] / Strong shaking (MMI VI) (reported through our app)
Gradiska (74.2 km ESE of epicenter) [Map] / Strong shaking (MMI VI) / both vertical and horizontal swinging / 5-10 s
Brckovljani, Zagrebačka (51.8 km N of epicenter) [Map] / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s (reported through our app)
Gorišnica (120.6 km NNW of epicenter) [Map] / Light shaking (MMI IV) / 1-2 s
Mali zdenci (71.5 km ENE of epicenter) [Map] / Light shaking (MMI IV) (reported through our app)
Jankomir, City of Zagreb (61.4 km NW of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Virovitica (97.2 km NE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Varaždin (107.8 km N of epicenter) [Map] / not felt (reported through our app)
Krsko (95.7 km NW of epicenter) [Map] / Light shaking (MMI IV)
Poljčane (122.8 km NNW of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 1-2 s : Light shaking for 2 - 3 seconds  
Zagreb, HR.21.3186885 (57.8 km NNW of epicenter) [Map] / Weak shaking (MMI III) (reported through our app)
Gornji Smrtici (116.6 km ESE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s
Sveta Nedjelja, Zagrebačka (65.7 km NW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s (reported through our app)
Mraclin, Grad Velika Gorica, Zagrebačka (39.5 km NNW of epicenter) [Map] / Strong shaking (MMI VI) / both vertical and horizontal swinging / 10-15 s (reported through our app)
Jankomir, City of Zagreb (58.9 km NW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake (reported through our app)
near Korenica, Garčin, Slavonski Brod-Posavina (142.2 km E of epicenter) [Map] / Very weak shaking (MMI II) (reported through our app)
Desinic (104.3 km NNW of epicenter) [Map] / Light shaking (MMI IV) / single lateral shake / 2-5 s (reported through our app)
Bunjani (40.2 km NNE of epicenter) [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s (reported through our app)
Zagreb, HR.21.3186885 (63.5 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 1-2 s (reported through our app)
Kiskunfélegyhaza, Bács-Kiskun (310.5 km ENE of epicenter) [Map] / Moderate shaking (MMI V) (reported through our app)
Marburg an der Drau, Maribor (144 km NNW of epicenter) [Map] / Very weak shaking (MMI II) / single vertical bump / very short (reported through our app)
Bedekovčina, Krapinsko-Zagorska (82.6 km NNW of epicenter) [Map] / Very weak shaking (MMI II)
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