Strong mag. 5.4 earthquake - North Pacific Ocean, 73 km east of Iwaki, Fukushima, Japan, on Wednesday, 5 May 2021 3:10 am (GMT +9) -

Strong mag. 5.4 earthquake - North Pacific Ocean, 73 km east of Iwaki, Fukushima, Japan, on Wednesday, 5 May 2021 3:10 am (GMT +9)

Strong magnitude 5.4 earthquake at 35 km depth

4 May 18:17 UTC: First to report: NIED after 6 minutes.
Update Tue, 4 May 2021, 18:21
Significant earthquake of magnitude 5.4 just reported 73 km northeast of Iwaki, Japan
5.4 quake 5 May 3:10 am (GMT +9)
5.4 quake 5 May 3:10 am (GMT +9)
A moderately shallow magnitude 5.4 earthquake was reported early morning near Iwaki, Iwaki-shi, Fukushima, Japan.
According to Japan's National Research Institute for Earth Science and Disaster Resilience (NIED), the quake hit on Wednesday 5 May 2021 at 3:10 am local time at a moderately shallow depth of 35.3 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.
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 Namie (pop. 21,900) located 69 km from the epicenter, Iwaki (pop. 357,300) 73 km away, Kitaibaraki (pop. 50,800) 95 km away, Hitachi (pop. 186,300) 114 km away, Kōriyama (pop. 340,600) 118 km away, and Fukushima (pop. 294,200) 124 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 data:

Date & time: 4 May 2021 18:10:46 UTC -
Local time at epicenter: Wednesday, 5 May 2021 3:10 am (GMT +9)
Magnitude: 5.4
Depth: 35.3 km
Epicenter latitude / longitude: 37.196°N / 141.688°E (North Pacific Ocean, Japan)
Nearest volcano: Adatara (133 km / 83 mi)
Nearby towns and cities:
69 km (43 mi) ESE of Namie (Futaba-gun) (pop: 21,900) --> See nearby quakes!
73 km (45 mi) ENE of Iwaki (pop: 357,300) --> See nearby quakes!
95 km (59 mi) ENE of Kitaibaraki (pop: 50,800) --> See nearby quakes!
114 km (71 mi) NE of Hitachi (pop: 186,300) --> See nearby quakes!
118 km (73 mi) E of Kōriyama (pop: 340,600) --> See nearby quakes!
124 km (77 mi) ESE of Fukushima (pop: 294,200) --> See nearby quakes!
139 km (87 mi) SSE of Sendai (pop: 1,063,100) --> See nearby quakes!
145 km (90 mi) NE of Mito (pop: 246,500) --> See nearby quakes!
245 km (152 mi) NE of Tokyo (pop: 8,336,600) --> See nearby quakes!
268 km (166 mi) NE of Yokohama (pop: 3,574,400) --> See nearby quakes!
355 km (221 mi) ENE of Honshū Island (pop: 104,000,000) --> See nearby quakes!
390 km (242 mi) NE of Shikine-jima Island (pop: 600) --> See nearby quakes!
Weather at epicenter at time of quake:
Broken Clouds 17.6°C (64 F), humidity: 84%, wind: 6 m/s (12 kts) from S
Primary data source: NIED (National Research Institute for Earth Science and Disaster Resilience)
Estimated released energy: 7.9 x 1012 joules (2.21 gigawatt hours, equivalent to 1898 tons of TNT or 0.1 atomic bombs!) More info
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If you felt this quake (or if you were near the epicenter), please share your experience and submit a short "I felt it" report! Other users would love to hear about it!
Also if you did NOT feel the quake although you were in the area, please report it! Your contribution is valuable also to earthquake science and earthquake hazard analysis and mitigation efforts. You can use your device location or the map to indicate where you were during the earthquake. Thank you!

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.
5.229 kmNear East Coast of Honshu, JapanGFZ
5.410 kmNear Sendai, JapanRENASS
5.018 km81 Km ESE of Namie, JapanUSGS

User reports for this quake (8)

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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Mark as helpful or interesting.
Send your own user report!
In bed / not felt : I heard it. Happens all the time with the pacific rim. Your location function is flawed tho.. I'm on the other side of the planet | 3 users found this interesting.  
Kunimi-Machi, Date-Gun / Moderate shaking (MMI V) / horizontal (sideways) swinging / 10-15 s : Moderate shaking - the bed was moving quite a lot. It woke me up. | One user found this interesting.  
Toyama (403 km W of epicenter) [Map] / not felt (reported through our app)
Sendai-shi (139.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) / both vertical and horizontal swinging / 15-20 s
142.9 km NNW of epicenter [Map] / Light shaking (MMI IV) / rattling, vibrating / 2-5 s (reported through our app)
Narita (187.1 km SW of epicenter) [Map] / not felt (reported through our app)
144.7 km NNW of epicenter [Map] / Very weak shaking (MMI II) (reported through our app)
Sendai-shi (139.8 km NNW of epicenter) [Map] / Light shaking (MMI IV) / both vertical and horizontal swinging / 15-20 s
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More info
Recorded aftershocks, latest first (5 quakes):
  • 14 May 2021 15:13 UTC
    | M 2.7 |
    36.7 km (22.8 mi) depth
    24 km (15 mi) distance
    | NIED | Details
  • 14 May 2021 10:20 UTC
    | M 2.5 |
    20.8 km (12.9 mi) depth
    21 km (13 mi) distance
    | NIED | Details
  • 13 May 2021 21:32 UTC
    | M 3.4 |
    20.4 km (12.7 mi) depth
    15 km (9 mi) distance
    | NIED | Details
  • 12 May 2021 01:15 UTC
    | M 2.7 |
    52.7 km (32.7 mi) depth
    30 km (19 mi) distance
    | NIED | Details
  • 10 May 2021 12:16 UTC
    | M 3.2 |
    28.5 km (17.7 mi) depth
    28 km (18 mi) distance
    | NIED | Details

Earlier earthquakes in the same area

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