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Japan · Kumamoto Prefecture

M4.3 Earthquake near Kamiamakusa, Kumamoto Prefecture (Japan)

UTC time: 2026-08-08 23:02:07 UTC Local time: —
Magnitude
M4.3
Depth
10.0 km
Source
USGS

Kumamoto Prefecture · Kamiamakusa

Country overview

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About this earthquake

A magnitude M4.3 earthquake was recorded near Kamiamakusa, Kumamoto Prefecture (Japan) on August 8, 2026 at 23:02 UTC. With a focal depth of about 10 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. 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 2 earthquakes, the strongest at M3.6.

Details

ID
d68e235f11a6f1bda1d258da54dfecaee5d05f10
Magnitude
M4.3
Depth
10.0 km
UTC time
2026-08-08 23:02:07 UTC
Local time
—
Country
Japan
State
Kumamoto Prefecture
City
Kamiamakusa
Source
usgs
Coordinates
32.45330, 130.37040
Temperature
29.2°C

Depth profile

Depth profile Depth: 10 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 10 km
Shallow
10 km
10 km — shallower than the regional average (33.7 km)
Regional average: 33.7 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

  • Unzendake
    Distance: 35 km ·Complex ·Elevation: 1'483 m ·Last eruption: 1996 ·Japan
  • Kirishimayama
    Distance: 74 km ·Shield ·Elevation: 1'700 m ·Last eruption: 2025 ·Japan
  • Yonemaru-Sumiyoshiike
    Distance: 79 km ·Maar(s) ·Elevation: 40 m ·Last eruption: -6200 ·Japan
  • Asosan Activity reported
    Distance: 82 km ·Caldera ·Elevation: 1'592 m ·Last eruption: 2021 ·Japan
  • Aira Activity reported
    Distance: 101 km ·Caldera ·Elevation: 1'117 m ·Last eruption: 2026 ·Japan
  • Kujusan
    Distance: 108 km ·Stratovolcano(es) ·Elevation: 1'791 m ·Last eruption: 1996 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Amakusa AirportJapan · AXJ · RJDA
    20.1 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-05

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Kumamoto Prefecture

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 199 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historic earthquake map · Japan

Open history map
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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