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M4.0 Depth: 30.0 km

M4.0 Earthquake near Kunigami, Okinawa Prefecture (Japan)

UTC time: 2026-08-04 18:21:30 UTC Local time: —

About this earthquake

A magnitude M4.0 earthquake was recorded near Kunigami, Okinawa Prefecture (Japan) on August 4, 2026 at 18:21 UTC. The hypocenter lay relatively close to the surface at around 30 km, increasing how strongly it was felt. Tremors of this size are distinctly felt and can occasionally cause light damage.

The event was recorded by EMSC. Japan: over the past 24 hours, QuakeMap24 logged 6 earthquakes, the strongest at M5.0.

Details

Magnitude
M4.0
Depth
30.0 km
UTC time
2026-08-04 18:21:30 UTC
Local time
—
Country
Japan
State
Okinawa Prefecture
City
Kunigami
County
Kunigami
Village
Kunigami
Source
emsc
Coordinates
26.80000, 128.40000
Temperature
29.4°C

Map

Depth profile

Depth profile Depth: 30 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 30 km
Shallow
30 km
30 km — close to the regional average (32.2 km)
Regional average: 32.2 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

Volcanoes nearby

  • Io-Torishima
    Distance: 121 km ·Complex ·Elevation: 212 m ·Last eruption: 1968 ·Japan
  • Yokoatejima
    Distance: 230 km ·Stratovolcano(es) ·Elevation: 495 m ·Last eruption: 1835 ·Japan
  • Akusekijima
    Distance: 319 km ·Stratovolcano(es) ·Elevation: 555 m ·Japan
  • Suwanosejima
    Distance: 341 km ·Stratovolcano(es) ·Elevation: 796 m ·Last eruption: 2026 ·Japan
  • Nakanoshima
    Distance: 369 km ·Stratovolcano(es) ·Elevation: 979 m ·Last eruption: 1914 ·Japan
  • Kuchinoshima
    Distance: 383 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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