Moderate mag. 3.9 earthquake - 27 km south of Stara Zagora, Bulgaria, on Friday, August 21, 2020 at 10:00 (GMT) -

Moderate mag. 3.9 earthquake - 27 km south of Stara Zagora, Bulgaria, on Friday, August 21, 2020 at 10:00 (GMT)

Moderate magnitude 3.9 earthquake at 10 km depth

21 Aug 10:03 UTC: First to report: EMSC after 3 minutes.
Aug 21 10:17: Magnitude recalculated from 3.8 to 3.9.
Hypocenter depth recalculated from 8.0 to 2.0 km.
Aug 21 10:22: Magnitude recalculated from 3.9 to 3.8.
Hypocenter depth recalculated from 2.0 to 4.0 km.
Aug 21 10:23: Magnitude recalculated from 3.8 to 3.9.
Hypocenter depth recalculated from 4.0 to 10.0 km.
Date & time: Aug 21, 2020 10:00:21 UTC -
Magnitude: 3.9
Depth: 10.0 km
Epicenter latitude / longitude: 42.19°N / 25.64°E (Opan, Stara Zagora, Bulgaria)
Antipode: 42.19°S / 154.36°W
Nearby towns and cities:
6 km (4 mi) WSW of Opan (pop: 525) --> See nearby quakes!
16 km (10 mi) N of Dimitrovgrad (Haskovo) (pop: 43,300) --> See nearby quakes!
25 km (16 mi) E of Chirpan (pop: 17,200) --> See nearby quakes!
27 km (17 mi) S of Stara Zagora (pop: 143,400) --> See nearby quakes!
29 km (18 mi) NNE of Haskovo (pop: 79,700) --> See nearby quakes!
36 km (22 mi) NW of Harmanli (Haskovo) (pop: 18,900) --> See nearby quakes!
36 km (23 mi) ENE of Parvomay (Plovdiv) (pop: 17,000) --> See nearby quakes!
45 km (28 mi) SW of Nova Zagora (Sliven) (pop: 24,300) --> See nearby quakes!
74 km (46 mi) E of Philippopel (Plovdiv) (pop: 340,500) --> See nearby quakes!
198 km (123 mi) ESE of Sofia (Sofia-Capital) (pop: 1,152,600) --> See nearby quakes!
Primary data source: EMSC (European-Mediterranean Seismological Centre)
Estimated released energy: 4.5 x 1010 joules (12.4 megawatt hours, equivalent to 10.7 tons of TNT) More info
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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
3.910 km74 km E of Plovdiv, BulgariaEMSC
3.75 kmBulgaristan (Bulgaria)KOERI-RETMC
3.935 km (Bulgaria)NOA
3.72 kmBugarska (Bulgaria)SSS

User reports for this quake (43)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Haskovo (34.4 km SSW of epicenter) [Map] / Very weak shaking (MMI II) : Vibration followed by weak shaking 1 -2 seconds. 8th floor  
Stara zagora (25.7 km N of epicenter) [Map] / Light shaking (MMI IV) : Duration about 2 seconds. Lateral swaying followed by vibration.  
Haskovo (30.8 km SSW of epicenter) [Map] / Moderate shaking (MMI V)
Dimitrovgrad, Haskovo (15.7 km SSW of epicenter) [Map] / Light shaking (MMI IV)
Dimitrovgrad, Haskovo (16.2 km SSW of epicenter) [Map] / not felt : It felt like someone next to me fell on the ground and my chair jumped slightly  
Bul. Balgaria 116, Haskovo Bulgaria / Very weak shaking (MMI II) : Was in Haskovo, Bulgaria, 5th floor of an apartment house. Felt light movement at my feet for 2-3 seconds, then more a second later for 1 second. | One user found this interesting.  
Dimitrovgrad, Haskovo region / not felt : I was on the second floor of a concrete building in Dimitrovgrad. The building started shaking and noise was heard for at least 10 seconds.  
Dimitrovgrad / Weak shaking (MMI III) : On 6th floor could feel  
Kazanlak / not felt : Kazanlak  
Snezhinka (Kardzhali reservoir) / Light shaking (MMI IV) : Two movements. Second stronger. Lamp next to my bed was shaking. Felt the walls of the house shake.  
Kazanlak / not felt : Kazanlak  
mihaylovo stara zagora / Weak shaking (MMI III) : I was sitting on the floor, there was vibration and sound.  
stara zagora, jeleznik / Very weak shaking (MMI II)
Haskovo / Strong shaking (MMI VI)
Stara Zagora / Light shaking (MMI IV)
(Bulgaria, 29 km S of epicenter) : Усетих вертикално раздрусване на леглото. Лампите дори не помръднаха, а сякаш някой ритна къщата отдолу нагоре. (reported through EMSC)  
Slivnitsa (Bulgaria, 226 km W of epicenter) : Не се усети в Сливница. (reported through EMSC)  
Sofia (Bulgaria, 199 km W of epicenter) : не се усети в София - 7ми етаж (reported through EMSC)  
(Bulgaria, 26 km NW of epicenter) : Like a wave (reported through EMSC)  
Dimitrovgrad (Bulgaria, 15 km S of epicenter) : It was very quick maybe a couple of seconds at most (reported through EMSC)  
Sector 6 (Romania, 251 km N of epicenter) : Eram in stația de metrou pe scări și a vibrat puțin 2/3 secunde (reported through EMSC)  
Kaolinovo (Bulgaria, 199 km NE of epicenter) : Not felt in shumen (reported through EMSC)  
Nesebar (Bulgaria, 180 km E of epicenter) : Nu s.a simtit deloc (reported through EMSC)  
Nesebar (Bulgaria, 180 km E of epicenter) : Not felt in Burgas (reported through EMSC)  
(Bulgaria, 103 km SW of epicenter) : Леко се усети в Смолян5 ти етаж. (reported through EMSC)  
(Bulgaria, 103 km SW of epicenter) : Усети се рязклащане (reported through EMSC)  
Plovdiv (Bulgaria, 74 km W of epicenter) : много слабо , но се усети (reported through EMSC)  
Kardzhali (Bulgaria, 64 km S of epicenter) : Не се усети (reported through EMSC)  
(Bulgaria, 28 km NE of epicenter) : Слабо (reported through EMSC)  
Stara Zagora (Bulgaria, 27 km N of epicenter) : feel it lightly (reported through EMSC)  
Stara Zagora (Bulgaria, 27 km N of epicenter) : Много леко го усетих. Бях легнал. (reported through EMSC)  
Stara Zagora (Bulgaria, 27 km N of epicenter) : Усети се леко на 5 етаж. (reported through EMSC)  
Stara Zagora (Bulgaria, 27 km N of epicenter) : Леко разтресе, докато бях на леглото. Не повече от 2-3 секунди. Стара Загора 5-ти етаж (reported through EMSC)  
Stara Zagora (Bulgaria, 27 km N of epicenter) : Леко, но се усети, за секунди (reported through EMSC)  
Gorski Izvor (Bulgaria, 27 km SW of epicenter) : Югоизточно от Димитровград, приземен етаж. Добре усетено, леко се посипа прах от тавана. 10-20 секунди, силен тътен. (reported through EMSC)  
Gorski Izvor (Bulgaria, 27 km SW of epicenter) : Well felt, weak vibration, severe sound. (reported through EMSC)  
Stara Zagora (Bulgaria, 26 km NW of epicenter) : Усети се леко от 5 етаж. (reported through EMSC)  
Stara Zagora (Bulgaria, 26 km NW of epicenter) : Разтресе леко все едно някои бутна леглото а в другата стая падна капака на компютъра (reported through EMSC)  
(Bulgaria, 26 km NW of epicenter) : I was on the ground floor sitting in a chair. I felt rocking a small cabinet next to me. (reported through EMSC)  
(Bulgaria, 24 km W of epicenter) : Не. Беше леко. (reported through EMSC)  
Dimitrovgrad (Bulgaria, 16 km S of epicenter) : Кратко и шумно. (reported through EMSC)  
(Bulgaria, 15 km S of epicenter) : There was a rumble like an explosion, but more muted. (reported through EMSC)  
(Bulgaria, 15 km S of epicenter) : Беше за кратко,чу се шум от долу,сякаш нещо се блъсна в сградата (reported through EMSC)  
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