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Strong mag. 5.6 earthquake - North Pacific Ocean, Japan, on Wednesday, Aug 17, 2022 at 1:24 pm (GMT +9) -

Strong mag. 5.6 earthquake - North Pacific Ocean, Japan, on Wednesday, Aug 17, 2022 at 1:24 pm (GMT +9) Strong mag. 5.6 earthquake - North Pacific Ocean, Japan, on Wednesday, Aug 17, 2022 at 1:24 pm (GMT +9)

Strong magnitude 5.6 earthquake at 10 km depth

17 Aug 04:34 UTC: First to report: GFZ after 9 minutes.
17 Aug 04:43: Now using data updates from USGS
17 Aug 09:16: Magnitude recalculated from 5.4 to 5.6. Epicenter location corrected by 1.4 km (0.9 mi) towards ENE.
17 Aug 20:32: Epicenter location corrected by 5.5 km (3.4 mi) towards ESE.

Earthquake details

Date & timeAug 17, 2022 04:24:45 UTC -
Local time at epicenterWednesday, Aug 17, 2022 at 1:24 pm (GMT +9)
StatusConfirmed
Magnitude5.6
Depth10.0 km
Epicenter latitude / longitude33.1604°N / 141.7489°E (North Pacific Ocean, Japan)
Antipode33.16°S / 38.251°W
Shaking intensityStrong shaking near epicenter
Felt1 report
Primary data sourceUSGS (United States Geological Survey)
Nearest volcanoHachijo-jima (184 km / 114 mi)
Nearby towns and cities257 km (160 mi) SSE of Katsuura (pop: 22,300) | Show on map | Quakes nearby
285 km (177 mi) SSE of Mobara (pop: 97,300) | Show on map | Quakes nearby
295 km (183 mi) SSE of Tōgane (pop: 66,300) | Show on map | Quakes nearby
298 km (185 mi) SE of Kisarazu (pop: 122,500) | Show on map | Quakes nearby
299 km (186 mi) SE of Kimitsu (pop: 92,100) | Show on map | Quakes nearby
310 km (193 mi) SSE of Chiba (pop: 919,700) | Show on map | Quakes nearby
318 km (198 mi) SE of Yokohama (pop: 3,574,400) | Show on map | Quakes nearby
339 km (210 mi) SE of Tokyo (pop: 8,336,600) | Show on map | Quakes nearby
182 km (113 mi) E of Hachijojima Island (pop: 7,520) | Show on map | Quakes nearby
268 km (167 mi) ESE of Shikine-jima Island (pop: 600) | Show on map | Quakes nearby
466 km (290 mi) SE of Honshu Island (pop: 104,000,000) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 28.2°C (83 F), humidity: 86%, wind: 8 m/s (16 kts) from WSW
Estimated seismic energy released1.6 x 1013 joules (4.4 gigawatt hours, equivalent to 3788 tons of TNT or 0.2 atomic bombs!) | 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
5.610 km256 Km SSE of Katsuura, JapanUSGS
5.310 kmOFF EAST COAST OF HONSHU, JAPANEMSC
5.610 kmOff East Coast of Honshu, JapanRaspberryShake
5.210 kmJapan: Near TokyoRENASS
5.810.2 kmOff East Coast of Honshu, Japan [Sea: Japan]INGV
5.510 km253 Km SSE of Katsuura, JapanGFZ
5.310 kmOff East Coast of Honshu, JapanGeoAu

Seismograms

Seismic station: Matsushiro, Japan (MAJO/IU network) | Distance from quake: 496 km / 308 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. Source: IRIS Buffer of Uniform Data (BUD) webtool
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User reports for this quake (2)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
Translate
Tokyo / Very weak shaking (MMI II) / 15-20 s
Otake-shi, Hiroshima / not felt (reported through our app)

Aftershocks

[More info]

Recorded aftershocks, latest first (3 quakes)

Date and timeMag
Depth
LocationDetails
Aug 28, 2022 00:01
13 weeks ago
3.6

105 km
North Pacific Ocean, JapanMore
Aug 22, 2022 21:04
14 weeks ago
4.5

10 km
North Pacific Ocean, 294 km SE of Chiba, JapanMore
Aug 17, 2022 12:17
15 weeks ago
4.3

10 km
North Pacific Ocean, JapanMore

Earlier earthquakes in the same area

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