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Moderate mag. 4.7 earthquake - Philippine Sea, 96 km east of Naha, Okinawa, Japan, on Friday, Sep 10, 2021 at 11:01 am (GMT +9) -

Moderate mag. 4.7 earthquake - Philippine Sea, 96 km east of Naha, Okinawa, Japan, on Friday, Sep 10, 2021 at 11:01 am (GMT +9) Moderate mag. 4.7 earthquake - Philippine Sea, 96 km east of Naha, Okinawa, Japan, on Friday, Sep 10, 2021 at 11:01 am (GMT +9)

Moderate magnitude 4.7 earthquake at 10 km depth

10 Sep 02:23 UTC: First to report: EMSC after 22 minutes.
10 Sep 03:59: Hypocenter depth recalculated from 10.0 to 20.0 km (from 6.2 to 12.4 mi). Epicenter location corrected by 13 km (7.9 mi) towards NW.
10 Sep 07:06: Hypocenter depth recalculated from 20.0 to 10.0 km (from 12.4 to 6.2 mi). Epicenter location corrected by 8.3 km (5.2 mi) towards SE.
Update Fri, 10 Sep 2021, 02:27

Moderate earthquake of magnitude 4.7 just reported 93 km southeast of Okinawa, Japan

4.7 quake 10 Sep 11:01 am (GMT +9)
4.7 quake 10 Sep 11:01 am (GMT +9)
A shallow magnitude 4.7 earthquake was reported in the morning near Okinawa, Okinawa Shi, Japan.
According to the European-Mediterranean Seismological Centre (EMSC), the quake hit on Friday, September 10th, 2021, at 11:01 am local time at a shallow depth of 10 km. Shallow earthquakes are felt more strongly than deeper ones as they are closer to the surface. 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.
Our monitoring service identified a second report from the United States Geological Survey which listed the quake at magnitude 4.7 as well.
Towns or cities near the epicenter where the quake might have been felt as very weak shaking include Katsuren-haebaru (pop. 34,200) located 86 km from the epicenter, Gushikawa (pop. 65,300) 87 km away, Nago (pop. 59,600) 91 km away, Okinawa (pop. 125,500) 93 km away, Ishikawa (pop. 22,400) 94 km away, Chinon (pop. 91,800) 95 km away, Chatan (pop. 27,800) 95 km away, Tomigusuku (pop. 55,700) 101 km away, Naha (pop. 300,800) 101 km away, and Itoman (pop. 57,200) 102 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 details

Date & timeSep 10, 2021 02:01:25 UTC -
Local time at epicenterFriday, Sep 10, 2021 at 11:01 am (GMT +9)
StatusConfirmed
Magnitude4.7
Depth10.0 km
Epicenter latitude / longitude26.1°N / 128.64°E (Philippine Sea, Japan)
Antipode26.1°S / 51.36°W
Shaking intensityModerate shaking near epicenter
Felt3 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearest volcanoIo-Torishima (204 km / 127 mi)
Nearby towns and cities81 km (50 mi) ESE of Katsuren-haebaru (Uruma) (pop: 34,200) | Show on map | Quakes nearby
82 km (51 mi) ESE of Gushikawa (pop: 65,300) | Show on map | Quakes nearby
87 km (54 mi) SE of Naga (pop: 59,600) | Show on map | Quakes nearby
88 km (54 mi) ESE of Okinawa (pop: 125,500) | Show on map | Quakes nearby
89 km (55 mi) ESE of Ishikawa (Uruma) (pop: 22,400) | Show on map | Quakes nearby
90 km (56 mi) E of Chinon (pop: 91,800) | Show on map | Quakes nearby
90 km (56 mi) ESE of Chatan (Nakagami District) (pop: 27,800) | Show on map | Quakes nearby
96 km (60 mi) E of Tomigusuku (pop: 55,700) | Show on map | Quakes nearby
96 km (60 mi) E of Naha (pop: 300,800) | Show on map | Quakes nearby
97 km (60 mi) E of Itoman (pop: 57,200) | Show on map | Quakes nearby
83 km (51 mi) SE of Okinawa Island (pop: 1,301,000) | Show on map | Quakes nearby
110 km (68 mi) SE of Iejima Island (pop: 4,610) | Show on map | Quakes nearby
Weather at epicenter at time of quakeClear Sky 29.6°C (85 F), humidity: 79%, wind: 7 m/s (13 kts) from SE
Estimated seismic energy released7.1 x 1011 joules (197 megawatt hours, equivalent to 169 tons of TNT) | 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
4.710 kmRYUKYU ISLANDS, JAPANEMSC
4.710 km87 Km ESE of Katsuren-haebaru, JapanUSGS

Seismograms

Seismic station: Taipei, Taiwan (TATO/IU network) | Distance from quake: 727 km / 452 mi | Show on map | Station Info
Seismic station Taipei, Taiwan: 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 (3)

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
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Translate
Japan (1527.1 km NE of epicenter) [Map] / Very weak shaking (MMI II) / single lateral shake / 2-5 s : On alert  
Pawing Palo Leyte / Very weak shaking (MMI II) / horizontal (sideways) swinging / 2-5 s
santa rosa / Very weak shaking (MMI II)

Earlier earthquakes in the same area

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