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Strong mag. 6.1 earthquake - North Pacific Ocean, Russia, on Tuesday, Sep 21, 2021 at 6:25 am (GMT +10) -

Strong mag. 6.1 earthquake - North Pacific Ocean, Russia, on Tuesday, Sep 21, 2021 at 6:25 am (GMT +10) Strong mag. 6.1 earthquake - North Pacific Ocean, Russia, on Tuesday, Sep 21, 2021 at 6:25 am (GMT +10)

Strong magnitude 6.1 earthquake at 36 km depth

20 Sep 20:33 UTC: First to report: GFZ after 8 minutes.
20 Sep 20:36: Magnitude recalculated from 6.2 to 6.1. Epicenter location corrected by 18 km (11 mi) towards WNW.
20 Sep 21:18: Hypocenter depth recalculated from 10.0 to 38.0 km (from 6.2 to 24 mi). Epicenter location corrected by 7.2 km (4.5 mi) towards NW.
21 Sep 09:24: Hypocenter depth recalculated from 38.0 to 36.0 km (from 24 to 22 mi). Epicenter location corrected by 3.4 km (2.1 mi) towards SSW.

Earthquake details

Date & timeSep 20, 2021 20:25:27 UTC -
Local time at epicenterTuesday, Sep 21, 2021 at 6:25 am (GMT +10)
Depth36.0 km
Epicenter latitude / longitude46.33°N / 152.41°E (North Pacific Ocean, Russia)
Antipode46.33°S / 27.59°W
Shaking intensityModerate shaking
Felt13 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoMilna (78 km / 48 mi)
Nearby towns and cities372 km (231 mi) ENE of Kuril'sk (pop: 1,720) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 12.1°C (54 F), humidity: 80%, wind: 9 m/s (18 kts) from W
Estimated seismic energy released8.9 x 1013 joules (24.8 gigawatt hours, equivalent to 21301 tons of TNT or 1.3 atomic bombs!) | about seismic energy
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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.
6.136 kmRussia: Kuril IslandsGFZ
6.144 kmRussia: Kuril IslandsBMKG
6.010 kmRussia: Near KushiroRENASS
6.120 kmKuril Islands, Russia [Sea: Russia]INGV
6.025 kmRussia: Kuril IslandsUSGS
6.237 kmRussia: Kuril IslandsGeoAu


Seismic station: Yuzhno Sakhalinsk, Russia (YSS/IU network) | Distance from quake: 739 km / 459 mi | Show on map | Station Info
Seismic station Yuzhno Sakhalinsk, Russia: 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 (14)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Leave a comment if you find a particular report interesting or want to add to it.
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Send your own user report!
Mount Evelyn Melbourne Victoria aust / Strong shaking (MMI VI) / 30-60 s
Melbourne Australia / Light shaking (MMI IV) / vibration and rolling / 2-5 s
Melbourne Victoria australia / Light shaking (MMI IV) : My friends that also lived in Victoria also experienced it  
Melbourne / Moderate shaking (MMI V) / rattling, vibrating / 10-15 s : The whole building was shaking possibly moderate shaking  
melbourne (515 km NNW of epicenter) [Map] / Moderate shaking (MMI V) / single lateral shake / 5-10 s
Melton Victoria Australia / Weak shaking (MMI III) / horizontal (sideways) swinging / 2-5 s : Scared  
Melbourne / Light shaking (MMI IV) / rattling, vibrating / 10-15 s
Melbourne / not felt / horizontal (sideways) swinging / 20-30 s
Ballarat, Victoria, Australia / Very weak shaking (MMI II) / rattling, vibrating / 2-5 s : Slight wobbling. Chairs and table moved Minor shaking, not dangerous  
Melbourne / Light shaking (MMI IV) / horizontal (sideways) swinging / 5-10 s : Scared the shizzles out of me! It was my first time experiencing earthquakes!  
Melbourn Victoria / Light shaking (MMI IV) / rattling, vibrating / 10-15 s
Cranbourne north / Strong shaking (MMI VI) / rattling, vibrating / 5-10 s
St Albans / Moderate shaking (MMI V) / complex motion difficult to describe / 15-20 s : My whole house was shaking for roughly 30 seconds  
santa rosa / Very weak shaking (MMI II)


[More info]

Recorded aftershocks, latest first (1 quake)

Date and timeMag
Nov 6, 2021 06:05
46 weeks ago

40 km
North Pacific Ocean, RussiaMore

Earlier earthquakes in the same area

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