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Weak mag. 3.7 earthquake - Kagoshima, 160 km northeast of Naha, Okinawa, Japan, on Sunday, Apr 4, 2021 at 8:27 pm (GMT +9)

Weak mag. 3.7 earthquake - Kagoshima, 160 km northeast of Naha, Okinawa, Japan, on Sunday, Apr 4, 2021 at 8:27 pm (GMT +9) Weak mag. 3.7 earthquake - Kagoshima, 160 km northeast of Naha, Okinawa, Japan, on Sunday, Apr 4, 2021 at 8:27 pm (GMT +9)

Weak magnitude 3.7 earthquake at 50 km depth

4 Apr 11:36 UTC: First to report: EMSC after 9 minutes.

Earthquake details

Date & timeApr 4, 2021 11:27:30 UTC
Local time at epicenterSunday, Apr 4, 2021 at 8:27 pm (GMT +9)
Depth50.0 km
Epicenter latitude / longitude27.4°N / 128.6°E (Ōshima-gun, Kagoshima, Japan)
Antipode27.4°S / 51.4°W
Shaking intensityVery weak shaking
Felt0 reports
Primary data sourceEMSC (European-Mediterranean Seismological Centre)
Nearest volcanoIo-Torishima (65 km / 40 mi)
Nearby towns and cities106 km (66 mi) NE of Naga (Okinawa) (pop: 59,600) | Show on map | Quakes nearby
137 km (85 mi) NNE of Gushikawa (Okinawa) (pop: 65,300) | Show on map | Quakes nearby
138 km (86 mi) SW of Naze (pop: 41,400) | Show on map | Quakes nearby
139 km (86 mi) NNE of Katsuren-haebaru (Uruma, Okinawa) (pop: 34,200) | Show on map | Quakes nearby
142 km (89 mi) NNE of Okinawa (pop: 125,500) | Show on map | Quakes nearby
151 km (94 mi) NNE of Chinon (Okinawa) (pop: 91,800) | Show on map | Quakes nearby
160 km (99 mi) NE of Naha (Okinawa) (pop: 300,800) | Show on map | Quakes nearby
163 km (101 mi) NNE of Tomigusuku (Okinawa) (pop: 55,700) | Show on map | Quakes nearby
169 km (105 mi) NNE of Itoman (Okinawa) (pop: 57,200) | Show on map | Quakes nearby
500 km (311 mi) SSW of Kagoshima (pop: 555,400) | Show on map | Quakes nearby
Weather at epicenter at time of quakeOvercast Clouds 19°C (66 F), humidity: 77%, wind: 10 m/s (19 kts) from NNW
Estimated seismic energy released2.2 x 1010 joules (6.22 megawatt hours, equivalent to 5.35 tons of TNT) | 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.


Seismic station: Okinawa Kunigami (JOW/JP network) | Distance from quake: 71 km / 44 mi | Show on map | Station Info
Seismic station Okinawa Kunigami: 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

User reports estimate the perceived ground shaking intensity according to the MMI (Modified Mercalli Intensity) scale.
There are no user reports for this quake.

Earlier earthquakes in the same area

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