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M4.7 Depth: 44.1 km

M4.7 Earthquake near Onna, Okinawa Prefecture (Japan)

UTC time: 2026-08-21 00:01:20 UTC Local time: —

About this earthquake

On August 21, 2026 at 00:01 UTC, a magnitude M4.7 earthquake occurred near Onna, Okinawa Prefecture (Japan). The hypocenter lay relatively close to the surface at around 44 km, increasing how strongly it was felt. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The event was recorded by USGS. Japan: over the past 24 hours, QuakeMap24 logged 3 earthquakes, the strongest at M5.5.

Details

Magnitude
M4.7
Depth
44.1 km
UTC time
2026-08-21 00:01:20 UTC
Local time
—
Country
Japan
State
Okinawa Prefecture
City
Onna
County
Kunigami
Village
Onna
Source
usgs
Coordinates
26.48480, 127.78590
Temperature
28.5°C

Map

Depth profile

Depth profile Depth: 44.1 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 44.1 km
Shallow
44.1 km
44.1 km — deeper than the regional average (32.9 km)
Regional average: 32.9 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Estimated impact

1 Felt reports · max reported intensity 3.4

Tectonic context

Located on the Okinawa Plate.
Near the boundary Yangtze ↔ Okinawa · about 103 km away

Volcanoes nearby

  • Io-Torishima
    Distance: 161 km ·Complex ·Elevation: 212 m ·Last eruption: 1968 ·Japan
  • Yokoatejima
    Distance: 284 km ·Stratovolcano(es) ·Elevation: 495 m ·Last eruption: 1835 ·Japan
  • Akusekijima
    Distance: 376 km ·Stratovolcano(es) ·Elevation: 555 m ·Japan
  • Suwanosejima
    Distance: 398 km ·Stratovolcano(es) ·Elevation: 796 m ·Last eruption: 2026 ·Japan
  • Nakanoshima
    Distance: 427 km ·Stratovolcano(es) ·Elevation: 979 m ·Last eruption: 1914 ·Japan
  • Kuchinoshima
    Distance: 440 km ·Stratovolcano(es) ·Elevation: 628 m ·Last eruption: 1190 ·Japan

Historic earthquake map · Japan

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Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · Japan

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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