Terremoto forte mag. 5.5 - 54 km a sud ovest da Bojnourd, North Khorasan, Iran, lunedì, 17 maggio 2021 -
Terremoto forte magnitudine 5.5 at 10 km depth
17 May 01:00 UTC: Primo a segnalare: GFZ dopo 6 minuti.
17 May 01:00: Magnitudine ricalcolata da 5.2 a 5.3. Posizione dell'epicentro corretta di 3.5 km (2.1 mi) al SSW.
17 May 05:36: Magnitudine ricalcolata da 5.3 a 5.5. Posizione dell'epicentro corretta di 19 km (12 mi) al S.
Update Mon, 17 May 2021, 01:06Significant 5.3 quake hits near Bojnourd, North Khorasan, Iran
5.3 quake 17 May 5:24 am (GMT +4:30)
An earthquake of magnitude 5.3 occurred only 12 minutes ago 47 km west of Bojnourd, Iran, the German Research Centre for Geosciences (GFZ) reported.
The quake hit at a shallow depth of 10 km beneath the epicenter near Bojnourd, North Khorasan, Iran, early morning on Monday 17 May 2021 at 4:54 am local time. The exact magnitude, epicenter, and depth of the quake might be revised within the next few hours or minutes as seismologists review data and refine their calculations, or as other agencies issue their report.
A second report was later issued by the European-Mediterranean Seismological Centre (EMSC), which listed it as a magnitude 5.5 earthquake. A third agency, France's Réseau National de Surveillance Sismique (RéNaSS), reported the same quake at magnitude 5.5.
Based on the preliminary seismic data, the quake was probably felt by many people in the area of the epicenter. It should not have caused significant damage, other than objects falling from shelves, broken windows, etc.
In Bojnourd (pop. 192,000) located 47 km from the epicenter, the quake should have been felt as light shaking.
Weak shaking might have been felt in Esfarāyen (pop. 59,700) located 76 km from the epicenter, Shīrvān (pop. 82,800) 100 km away, and Kalāleh (pop. 33,700) 116 km away.
VolcanoDiscovery will automatically update magnitude and depth if these change and follow up if other significant news about the quake become available. If you're in the area, please send us your experience through our reporting mechanism, either online
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Data & ora: 17 May 2021 00:54:01 UTC -
Ora locale a epicentro:
17 May 5:24 am (GMT +4:30)
Profondità: 10.0 km
Epicentro latitudine / longitudine: 37.29°N / 56.76°E
Nearby towns and cities:54 km OSO da Bojnourd
(pop: 192,000) --> Vedi sismi vicini71 km ONO da Esfarāyen
(pop: 59,700) --> Vedi sismi vicini104 km O da Shīrvān
(pop: 82,800) --> Vedi sismi vicini112 km E da Kalāleh (Kalaleh, Golestan)
(pop: 33,700) --> Vedi sismi vicini141 km E da Gonbad-e Kāvūs (Golestan)
(pop: 131,400) --> Vedi sismi vicini143 km E da Āzādshahr (Golestan)
(pop: 47,600) --> Vedi sismi vicini145 km NO da Sabzevar (Razavi Khorasan)
(pop: 226,200) --> Vedi sismi vicini161 km OSO da Aşgabat (Ashgabat, Turkmenistan)
(pop: 727,700) --> Vedi sismi vicini276 km ONO da Mashhad (Razavi Khorasan)
(pop: 2,307,200) --> Vedi sismi vicini509 km ENE da Teheran (Tehrān)
(pop: 7,153,300) --> Vedi sismi vicini
Weather at epicenter at time of quake:
Clear Sky 11°C
(52 F), humidity: 50%, wind: 1 m/s (2 kts)
Fonte dati primaria: GFZ
(German Research Centre for Geosciences)
Stima dell'energia sismica liberata: 1.1 x 1013
joules (3.12 gigawatt hours, equivalent to 2682 tons of TNT or 0.2 atomic bombs!) More info
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.
|5.5||10 km||Northern And Central Iran||GFZ|
|unknown||n/a||Near Gorgan, Golestan, Iran||VolcanoDiscovery|
|5.4||10 km||Iran: Near Ashgabat||RENASS|
|5.3||10 km||NORTHEASTERN IRAN||EMSC|
|5.4||10 km||Iran: 17 Km of Sankhast, North Khorasan||IRSC|
|5.2||10 km||Iran: 伊朗||CEIC|
|5.4||10 km||55 Km WSW of Bojnūrd, Iran||USGS|
|5.5||10 km||Northern And Central Iran||BMKG|
|5.7||29 km||Northern And Central Iran||GeoAu|
|5.7||4 km||Iran: Western Asia||KNDC|
|5.6||10 km||Iran: 147km WSW of Ashgabat, Turkmenistan||NCS|
User reports for this quake (12)
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Ashgabat, Turkmenistan (214.6 km ENE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : It was around 4:40 a.m. I was asleep. Then I woke up of a sudden shake. My bed as well as some furniture moved from side to side. It lasted a few seconds. | 4 users found this interesting.
141.7 km W of epicenter [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s : It woke me up! | 3 users found this interesting.
home (3399 km WNW of epicenter) [Map] / Very weak shaking (MMI II) / complex motion difficult to describe / 30-60 s : longer transition of cold power | 2 users found this interesting.
Ashgabat (154.3 km ENE of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Shahshsh | One user found this interesting.
Gorgan / Light shaking (MMI IV) / 20-30 s
Mashhad / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s
113.8 km W of epicenter [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 10-15 s
بجنورد / Strong shaking (MMI VI) / rattling, vibrating / 2-5 s
Ashgabat (156.3 km ENE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s
Bojnourd / Light shaking (MMI IV) / very short
Ashgabat / Light shaking (MMI IV) / horizontal (sideways) swinging / 15-20 s
211.9 km WSW of epicenter [Map] / Weak shaking (MMI III) / 2-5 s
AftershocksPlease check again later while we are collecting more data.
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