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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)
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.
5.610 km256 Km SSE of Katsuura, JapanUSGS
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


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
Show more

User reports for this quake (2)

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


[More info]

Recorded aftershocks, latest first (3 quakes)

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

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

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

10 km
North Pacific Ocean, JapanMore

Earlier earthquakes in the same area

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