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Strong mag. 6.3 earthquake - Near East Coast of Honshu, Japan on Sunday, 4 August 2019 - information

Strong mag. 6.3 earthquake - North Pacific Ocean, 53 km northeast of Namie, Futaba-gun, Fukushima, Japan, on Sunday, August 4, 2019 at 10:23 GMT

Strong mag. 6.3 earthquake - North Pacific Ocean, 53 km northeast of Namie, Futaba-gun, Fukushima, Japan, on Sunday, August 4, 2019 at 10:23 GMT Strong mag. 6.3 earthquake - North Pacific Ocean, 53 km northeast of Namie, Futaba-gun, Fukushima, Japan, on Sunday, August 4, 2019 at 10:23 GMT

Strong magnitude 6.3 earthquake at 49 km depth

4 Aug 10:30 UTC: First to report: GFZ after 8 minutes.
Aug 4 10:33: Magnitude recalculated from 6.1 to 6.2.
Hypocenter depth recalculated from 76.0 to 59.0 km.
Aug 5 07:00: Magnitude recalculated from 6.2 to 6.3.
Hypocenter depth recalculated from 59.0 to 49.0 km.

Earthquake details

Date & timeAug 4, 2019 10:23:04 UTC
Local time at epicenter
StatusConfirmed
Magnitude6.3
Depth49.0 km
Epicenter latitude / longitude37.72°N / 141.52°E (North Pacific Ocean, Japan)
Antipode37.72°S / 38.48°W
Shaking intensityLight shaking
Felt87 reports
Primary data sourceGFZ (German Research Centre for Geosciences)
Nearest volcanoZao (111 km / 69 mi)
Nearby towns and cities53 km (33 mi) ENE of Namie (Futaba-gun) (pop: 21,900) | Show on map | Quakes nearby
68 km (42 mi) ESE of Watari (pop: 36,300) | Show on map | Quakes nearby
72 km (44 mi) ESE of Kakuda (pop: 33,200) | Show on map | Quakes nearby
72 km (45 mi) SE of Iwanuma (pop: 42,400) | Show on map | Quakes nearby
79 km (49 mi) SSE of Schiogama (pop: 59,500) | Show on map | Quakes nearby
80 km (50 mi) SSE of Ishinomaki (pop: 117,200) | Show on map | Quakes nearby
84 km (52 mi) SE of Sendai (pop: 1,063,100) | Show on map | Quakes nearby
93 km (58 mi) E of Fukushima (pop: 294,200) | Show on map | Quakes nearby
93 km (58 mi) NE of Iwaki (pop: 357,300) | Show on map | Quakes nearby
279 km (173 mi) NE of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
274 km (170 mi) E of Sado Island (pop: 55,200) | Show on map | Quakes nearby
367 km (228 mi) ENE of Honshu Island (pop: 104,000,000) | Show on map | Quakes nearby
431 km (268 mi) NNE of Shikine-jima Island (pop: 600) | Show on map | Quakes nearby
Estimated seismic energy released1.8 x 1014 joules (49.4 gigawatt hours, equivalent to 42502 tons of TNT or 2.7 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.
Mag.DepthLocationSource
6.349 kmNear East Coast of Honshu, JapanGFZ
6.460 kmNear East Coast Of Honshu, JapanEMSC
6.351 kmNear East Coast of Honshu, JapanGeoAu
6.320 kmNear east coast of eastern Honshu, Japan [Sea: Japan]INGV
6.339 km54km ENE of Namie, JapanUSGS
6.240 km日本本州东岸近海 (Japan)CEIC
6.410 kmNear Nouth Coast of Honshu,JapanIMD
6.410 kmNear East Coast of Honshu, JapanBMKG

Seismograms

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 322 km / 200 mi | Show on map | Station Info
Seismic station Matsushiro, Japan: 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. Bandpass filter applied: 0.1-10.0 Hz. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (129)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Tokyo, Shinjuku / Weak shaking (MMI III)
Tokyo / Light shaking (MMI IV) : Lights and drinks shaking  
Tokyo/golden gai / Weak shaking (MMI III) : Tokyo: we were eating in a small bar near Golden Gai. The table and lights shaked during ~10 sec.  
Nikko / Light shaking (MMI IV)
Tokyo (271.2 km SW of epicenter) [Map] / not felt (reported through our app)
Ibaraki-ken, Mito-shi, Migawa / Strong shaking (MMI VI)
Shinjuku / Weak shaking (MMI III)
Seishincho / Moderate shaking (MMI V)
Narita (241.4 km SSW of epicenter) [Map] / Moderate shaking (MMI V)
Shinagawa / Weak shaking (MMI III)
Fussa shi US air base / Very weak shaking (MMI II) : Watching tv with husband and felt the vibrations on  
Tokyo (269.5 km SW of epicenter) [Map] / Very weak shaking (MMI II) : 5th floor of hotel. Door rattled,window squeaked, and gentle swaying felt.  
Yokohana, / Light shaking (MMI IV) : I was lying on my bed and it was very weak but pretty long  
Moreno Valley I hear a rumble echoe sounds.. like / Weak shaking (MMI III) : I heard that rumble sound and like something passing.. I'm not sure if it was just outside or what because I was in side..  
Russia. Sankt-Peterburg.not felt. / not felt : Не почувствовал и не ощущал, находился в доме, обедал, всё тихо и с  
Tamachi / Light shaking (MMI IV) : it was slow and light at first, but gradually became moderate, lights and hanging things started swaying, and for longer period. My child got scared.  
guerneville, CA / not felt : It only woke me up  
Tokyo, Shinjuku / Light shaking (MMI IV)
Shinjuku, daikyo-cho / Moderate shaking (MMI V)
Shibuya (280.4 km SW of epicenter) [Map] / Light shaking (MMI IV) : We are visiting, I grew in Coronado, California and knew immediately we were having an earthquake - it went right into it - our hotel room is on the 6th floor on the higher part of the Sh  
Hirstsuka / Light shaking (MMI IV)
Tokio Ueno / Light shaking (MMI IV)
San Diego / Very weak shaking (MMI II) : Quick shaking. Woke me up. Dog barked briefly.  
Sendai / Moderate shaking (MMI V)
Higashikurume / Light shaking (MMI IV)
Kawasaki / Weak shaking (MMI III)
Ayase city, Kanagawa / Light shaking (MMI IV)
Yokosuka / Weak shaking (MMI III) : About 3 waves of swaying. Ground floor.  
Chou-ku / Light shaking (MMI IV) : I’m on the 18th floor in a apartment located in Chou-ku Tokyo. There was a big jolt then the shaking continued for 30-45 seconds.  
Tamura / Moderate shaking (MMI V) : It was fairly strong. A few items in my apartment fell over.  
274.3 km SW of epicenter [Map] / Light shaking (MMI IV)
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Aftershocks

[More info]

Recorded aftershocks, latest first (17 quakes)

Date and timeMag
Depth
LocationDetails
Jan 24, 2020 03:44
3 years ago
4.6

30 km
North Pacific Ocean, 93 km E of Iwaki, Fukushima, JapanMore
Jan 22, 2020 10:38
3 years ago
4.1

50 km
North Pacific Ocean, 46 km E of Iwaki, Fukushima, JapanMore
Jan 15, 2020 10:50
3 years ago
3.7

40 km
North Pacific Ocean, 95 km SE of Ishinomaki, Honshu-miyagi-ken, JapanMore
Jan 8, 2020 15:25
3 years ago
4.5

35 km
North Pacific Ocean, 129 km E of Iwaki, Fukushima, JapanMore
Jan 8, 2020 02:57
3 years ago
4.9

20 km
North Pacific Ocean, 95 km E of Namie, Futaba-gun, Fukushima, JapanMore
Dec 28, 2019 12:24
3 years ago
4.4

49 km
North Pacific Ocean, 84 km E of Namie, Futaba-gun, Fukushima, JapanMore
Dec 17, 2019 15:16
3 years ago
3.8

90 km
North Pacific Ocean, 20 km E of Iwaki, Fukushima, JapanMore
Dec 11, 2019 09:39
3 years ago - felt
5.2

45 km
North Pacific Ocean, 94 km SE of Ishinomaki, Honshu-miyagi-ken, JapanMore
Dec 7, 2019 22:14
3 years ago
3.8

50 km
North Pacific Ocean, 77 km SE of Ishinomaki, Honshu-miyagi-ken, JapanMore
Dec 7, 2019 03:33
3 years ago
4.7

33 km
North Pacific Ocean, 62 km E of Namie, Futaba-gun, Fukushima, JapanMore
Nov 6, 2019 13:16
3 years ago
4.8

47 km
Near East Coast of Honshu, JapanMore
Nov 3, 2019 05:02
3 years ago
5.0

33 km
Near East Coast of Honshu, JapanMore
Oct 6, 2019 06:03
3 years ago
4.6

35 km
North Pacific Ocean, 91 km E of Namie, Futaba-gun, Fukushima, JapanMore
Sep 11, 2019 16:44
3 years ago
4.3

49 km
North Pacific Ocean, 75 km SE of Ishinomaki, Honshu-miyagi-ken, JapanMore
Aug 23, 2019 18:11
3 years ago
4.5

45 km
North Pacific Ocean, 87 km E of Iwaki, Fukushima, JapanMore
Aug 23, 2019 18:05
3 years ago
4.5

36 km
North Pacific Ocean, 57 km E of Ishinomaki, Honshu-miyagi-ken, JapanMore
Aug 7, 2019 12:10
4 years ago
4.5

24 km
North Pacific Ocean, 43 km NE of Iwaki, Fukushima, JapanMore

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