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Moderate mag. 4.3 earthquake - 17 km south of Rasht, Gilan Province, Iran, on Friday, Aug 12, 2022 at 10:51 pm (GMT +4:30) -

Moderate mag. 4.3 earthquake - 17 km south of Rasht, Gilan Province, Iran, on Friday, Aug 12, 2022 at 10:51 pm (GMT +4:30) Moderate mag. 4.3 earthquake - 17 km south of Rasht, Gilan Province, Iran, on Friday, Aug 12, 2022 at 10:51 pm (GMT +4:30)

Moderate magnitude 4.3 earthquake at 10 km depth

12 Aug 18:29 UTC: First to report: VolcanoDiscovery after 8 minutes.
12 Aug 18:36: Now using data updates from EMSC
12 Aug 21:20: Now using data updates from USGS
Update Fri, 12 Aug 2022, 18:42

Moderate magnitude 4.3 quake hits 33 km west of Bandar-e Anzali, Iran late at night

4.3 quake 12 Aug 10:51 pm (GMT +4:30)
4.3 quake 12 Aug 10:51 pm (GMT +4:30)
The European-Mediterranean Seismological Centre (EMSC) reported a magnitude 4.3 quake in Iran near Bandar-e Anzali, Gilan Province, only 21 minutes ago. The earthquake hit late at night on Friday, August 12th, 2022, at 10:21 pm local time at a shallow depth of 23 km. 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.
Our monitoring service identified a second report from the citizen-seismograph network of RaspberryShake which listed the quake at magnitude 4.3 as well.
Based on the preliminary seismic data, the quake should not have caused any significant damage, but was probably felt by many people as light vibration in the area of the epicenter.
Weak shaking might have been felt in Bandar-e Anzali (pop. 110,800) located 33 km from the epicenter, Fūman (pop. 27,800) 36 km away, and Hashtpar (pop. 45,300) 37 km away.
Other towns or cities near the epicenter where the quake might have been felt as very weak shaking include Rasht (pop. 594,600) located 51 km from the epicenter, Khalkhāl (pop. 51,000) 51 km away, Āstāneh-ye Ashrafīyeh (pop. 42,800) 80 km away, Pādegān-e Manjīl (pop. 17,400) 89 km away, and Langarūd (pop. 68,100) 100 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 or via our mobile app. This will help us provide more first-hand updates to anyone around the globe who wants to know more about this quake.

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Earthquake details

Date & timeAug 12, 2022 18:21:09 UTC -
Local time at epicenterFriday, Aug 12, 2022 at 10:51 pm (GMT +4:30)
StatusConfirmed
Magnitude4.3
Depth10.0 km
Epicenter latitude / longitude37.1275°N / 49.5909°E (Gilan Province, Iran)
Antipode37.128°S / 130.409°W
Shaking intensityWeak shaking
Felt13 reports
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoSabalan (193 km / 120 mi)
Nearby towns and cities17 km (10 mi) S of Rasht (Gīlān) (pop: 594,600) | Show on map | Quakes nearby
27 km (17 mi) ESE of Fūman (Fuman, Gīlān) (pop: 27,800) | Show on map | Quakes nearby
35 km (22 mi) WSW of Āstāneh-ye Ashrafīyeh (Gīlān) (pop: 42,800) | Show on map | Quakes nearby
40 km (25 mi) SSE of Bandar-e Anzali (Gīlān) (pop: 110,800) | Show on map | Quakes nearby
46 km (28 mi) NNE of Pādegān-e Manjīl (Gīlān) (pop: 17,400) | Show on map | Quakes nearby
50 km (31 mi) W of Langarūd (Gīlān) (pop: 68,100) | Show on map | Quakes nearby
191 km (119 mi) NW of Karadj (Alborz Province) (pop: 1,448,100) | Show on map | Quakes nearby
229 km (142 mi) NW of Tehran (pop: 7,153,300) | Show on map | Quakes nearby
Estimated seismic energy released1.8 x 1011 joules (49.4 megawatt hours, equivalent to 42.5 tons of TNT) | about seismic energy
Show interactive Map
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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
4.310 kmNEAR THE COAST OF NORTHERN IRANUSGS
4.310 kmIran: Caspian SeaRaspberryShake
4.323 kmIran: 7 Km of Rezvanshahr, GilanIRSC
4.32 km16 Km S of Rasht, IranEMSC
4.210 kmIran: Caspian SeaGFZ

Seismograms

Seismic station: Garni, Armenia (GNI/IU network) | Distance from quake: 539 km / 335 mi | Show on map | Station Info
Seismic station Garni, Armenia: 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. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (13)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Rasht (26.8 km WNW of epicenter) [Map] / Weak shaking (MMI III) / single lateral shake / 1-2 s : I was going to sleep and I was in my bed. At first I felt a strong wind is blowing but immediately I understood the window, floor and my bed are shaking. It didn't last too much but I think it was strong.  
Iran Rasht (16 km NNE of epicenter) [Map] / Very weak shaking (MMI II) : I saw the chandelier swing and I felt it while I was sitting on the sofa in the fourth floor with no neighbors upstairs.  
Rasht / Light shaking (MMI IV) / complex rolling (tilting in multiple directions) / 15-20 s : It was pretty strong for us, as we felt it in our apartment. | One user found this interesting.  
Rasht (18 km N of epicenter) [Map] / Light shaking (MMI IV) / horizontal (sideways) swinging / 2-5 s
Rasht, Gīlān (12.6 km N of epicenter) [Map] / Moderate shaking (MMI V) / single lateral shake / 1-2 s : I seat on fearnicher and I moved with fernicher to right around 5 centimeter  
Khoshklat Village - Rudsar (76 km E of epicenter) [Map] / Very weak shaking (MMI II) / both vertical and horizontal swinging / 1-2 s : A little shake on ground  
Rezvanshahr, Valiasr town (65.9 km NW of epicenter) [Map] / Moderate shaking (MMI V) / simple rolling (tilting sideways along one direction) / 2-5 s
30 km of Hashtpar, Gīlān (66.1 km NW of epicenter) [Map] / Weak shaking (MMI III) : Shaking and loud noise  
Astaneh-ye ashrafiyeh (33.9 km ENE of epicenter) [Map] / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s
Rasht / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : I felt fear  
Rasht / Weak shaking (MMI III) / 2-5 s (reported through our app)
Rasht / Very weak shaking (MMI II) / single vertical bump / very short
Rasht / Weak shaking (MMI III) / horizontal (sideways) swinging / 5-10 s

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