Petrinja earthquake in 2020

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Earthquake near Petrinja
Earthquake near Petrinja 2020 (Croatia)
Bullseye1.svg
date December 29, 2020
Time 11:19:54 UTC
intensity VIII – IX  on the EMS scale
Magnitude 6.4  M W
depth 10 km
epicenter 45 ° 25 ′ 19 ″  N , 16 ° 15 ′ 18 ″  E Coordinates: 45 ° 25 ′ 19 ″  N , 16 ° 15 ′ 18 ″  E
country CroatiaCroatia Croatia


The earthquake near Petrinja shook the earth near the Croatian cities of Petrinja and Sisak on December 29, 2020 at 12:19 p.m. local time .

earthquake

The earthquake with a magnitude of 6.4 M W on the moment-magnitude scale had its epicenter near the southwestern outskirts of Petrinja and a few kilometers south-southwest of Sisak. Its focal depth was given as 10 kilometers. The tectonic events in Croatia are dominated by the relative movement of the Eurasian and Adriatic plates , which border each other in the country. The December 29, 2020 earthquake was a leaf displacement on a fault within the Eurasian Plate, likely on the southwest-northeast trending Petrinja fault zone . The clods are likely to have moved against each other over a distance of around 25 kilometers.

It was the strongest earthquake in Croatia since instrumental earthquake records began. The energy released was about 30 times stronger than that of the Zagreb earthquake in March 2020 at 5.4 MW .

According to estimates by the United States Geological Survey (USGS), the earthquake was felt by more than 2.8 million people at an intensity level V or higher on the Modified Mercalli Scale, including approximately 15,000 people who experienced intensity VIII and another 83,000 who experienced intensity VII experienced. The quake was also felt in Austria , Germany , the Czech Republic , Slovakia , Hungary , Slovenia , Bosnia and Herzegovina , Serbia , Montenegro , Romania and Italy . The Krško nuclear power plant in Slovenia was shut down as a precaution.

In the first hours after the main quake, there were more than 20 aftershocks with magnitudes of 2.5 or higher. The strongest aftershock occurred on December 30th and reached a magnitude of 4.8 m b .

On the day before the main quake, seven foreshocks had occurred in the region, the strongest at 6:28 a.m. local time reaching a magnitude of 5.2 m b .

Victims and damage

Seven people were killed and several injured in the earthquake.

Serious damage occurred in Petrinja, where houses collapsed. Sisak and Glina were also badly hit. According to an initial estimate, more than 1,000 buildings were completely destroyed in the area of ​​the three cities, at least as many were damaged. Damage was also reported from other locations. In parts of Croatia, the power supply and the telephone network went down temporarily. On the first night after the quake, around 9,000 people were still without electricity.

Buried people were searched for with dogs , the Croatian military supported the search and helped with the transfer of patients from the damaged pneumology clinic in Petrinja and the damaged hospital in Sisak.

Some homeless people were housed in tents, gyms and barracks, while others spent the first night with relatives, outdoors or in cars.

No people were injured in the foreshock on December 28th, but more than 500 buildings have already been damaged.

The European Union agreed to support Croatia and Croatia activated the EU civil protection mechanism .

The Croatian government declared January 2, 2021 a national day of mourning.

supporting documents

  1. ↑ Intenzitet u epicentru… In: twitter.com . Seismological service at the Geophysical Institute of the University of Zagreb, December 29, 2020, accessed on December 29, 2020 (Croatian).
  2. ↑ a b c M 6.4 - 3 km WSW of Petrinja, Croatia. USGS , accessed December 29, 2020.
  3. ↑ M 6.4 - CROATIA - 2020-12-29 11:19:54 UTC. EMSC , accessed December 29, 2020.
  4. ↑ Terremoto Mw 6.4 in Croazia, December 29, 2020, approfondimento. In: ingvterremoti.com . December 29, 2020, accessed December 29, 2020 (Italian).
  5. ↑ Sotiris Valkaniotis: Best candidate fault structure… In: twitter.com . December 29, 2020, accessed on December 29, 2020.
  6. ↑ Geofizičar objasnio zašto je došlo do razornog potresa: 'Glavni uzrok nalazi se daleko od Petrinje i Gline'. In: jutarnji.hr . December 30, 2020, accessed December 30, 2020 (Croatian).
  7. ↑ a b UŽIVO Sedam mrtvih, deseci ozlijeđenih, traje potraga za preživjelima. In: hr.n1info.com . December 29, 2020, accessed December 29, 2020 (Croatian).
  8. ↑ M 6.4 - 3 km WSW of Petrinja, Croatia: Pager. USGS, accessed December 29, 2020.
  9. ↑ a b Tlo u Petrinji se još trese: Iz ruševina izvukli dvoje živih, traje potraga. In: index.hr . December 29, 2020, accessed December 29, 2020 (Croatian).
  10. ↑ a b earthquake also felt in Vienna. In: orf.at . December 29, 2020, accessed December 29, 2020.
  11. ^ Krško nuclear power station shut down as a precaution after quake. In: sta.si . December 29, 2020, accessed on December 29, 2020.
  12. ↑ "Radi se o razornom potresu, zabilježeno više od 20 naknadnih većih od 2.5". In: hr.n1info.com . December 29, 2020, accessed December 29, 2020 (Croatian).
  13. ↑ M 4.8 - Croatia region. USGS, accessed December 30, 2020.
  14. ↑ M 5.2 - 8 km W of Petrinja, Croatia. USGS, accessed December 29, 2020.
  15. ↑ a b Serious damage in Croatia, at least seven dead, nightly search for people buried. In: kleinezeitung.at . December 29, 2020, accessed December 29, 2020.
  16. ↑ a b c Earthquake in Croatia: More than 1,000 buildings completely destroyed. In: orf.at . December 30, 2020, accessed December 30, 2020.
  17. ↑ a b Strong earthquake shakes Croatia. In: orf.at . December 29, 2020, accessed December 29, 2020.
  18. ↑ a b UŽIVO: Razorni potres 6,2 po Richteru: razrušeni Petrinja, Sisak, Glina, ima žrtava i ozlijeđenih. In: hrt.hr . December 29, 2020, accessed on December 29, 2020.
  19. ↑ Further tremors, search for buried victims. In: orf.at . December 30, 2020, accessed December 30, 2020.
  20. ↑ U tri jaka potresa u Sisku, Petrinji i Glini oštećeno petstotinjak objekata. In: hrt.hr . December 28, 2020, accessed December 29, 2020 (Croatian).