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1990 Vrancea earthquakes information


1990 Vrancea earthquakes
Epicenter of main shock
UTC timeDoublet earthquake:    
 1990-05-30 10:40:06
 1990-05-31 00:17:48
ISC event 
 370780
 370841
USGS-ANSS 
 ComCat
 ComCat
Local date30/31 May 1990
Local time 
 13:40
 03:17
Magnitude 
 7.0 Ms(HRV)[1]
 6.2 Ms(HRV)[2]
Depth89 km (55 mi)
Areas affectedRomania
Bulgaria
Soviet Union
(Moldova, Ukraine)
Total damage16 million US$ in Romania
2 million US$ in Bulgaria
2 million US$ in Moldova
24 million US$ insured losses in Romania
Max. intensityMMI VI (Strong)
LandslidesYes
Aftershocks80
Casualties14 dead, 362 injured

The 1990 Vrancea earthquakes were three earthquakes on 30 and 31 May 1990 with magnitudes of 7.0 Mw[3] and 6.2 Mw[4] that struck the Romanian county of Vrancea, on two consecutive days. Severe damage in the Bucharest-Brăila-Brașov area was reported and dozens of casualties in Romania and neighbouring Moldova, Ukraine and Bulgaria.

The seismic doublet of May 1990 consisted of two mainshocks occurred at a distance of only 13 hours.[5] The first mainshock took place in the afternoon of 30 May 1990, at 13:40:06 (local hour). The epicenter was located in the northeastern part of the Vrancea Mountains (45°54′N 26°54′E / 45.9°N 26.9°E / 45.9; 26.9), at a depth of 89 km. The earthquake had a magnitude of MGR  6.7 or Mw  6.9, the intensity in the epicentral area being of VIII degrees on the Mercalli intensity scale, and VII degrees in Bucharest.[5] On the morning of 31 May 1990, at 3:17 (local hour), occurred the second mainshock, at a depth of 79–86 km, having the magnitude MGR  6.1 or Mw  6.3.[5] The event was felt in the epicentral area with an intensity of VII degrees on the Mercalli intensity scale, and VI degrees in Bucharest; likewise, the quake was felt strong enough in Dobruja.

In the USGS EXPO-CAT database it is estimated that during this earthquake 355,000 people were exposed to intensity VII, of which around 61% were in rural areas.

  1. ^ ISC-EHB Event 370780 [IRIS].
  2. ^ ISC-EHB Event 370840 [IRIS].
  3. ^ ISC-EHB Event 370780 [IRIS].
  4. ^ ISC-EHB Event 370841 [IRIS].
  5. ^ a b c "Cutremurele vrâncene din 30 și 31 mai 1990". Cutremur.net (in Romanian). 8 November 2012. Archived from the original on 2015-12-08. Retrieved 2014-09-21.

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