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Japan · Kumamoto Prefecture

M3.4 Earthquake near Kosa, Kumamoto Prefecture (Japan)

UTC time: 2026-07-28 09:39:30 UTC Local time: —

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About this earthquake

On July 28, 2026 at 09:39 UTC, a magnitude M3.4 earthquake occurred near Kosa, Kumamoto Prefecture (Japan). 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 often felt but rarely cause damage.

The event was recorded by EMSC. Japan: 8 earthquakes were recorded in the past 24 hours, the strongest reaching M5.7.

Details

ID
3659a42b6a19a5f2a4e0f8319cac13edbfed0ba6
Magnitude
M3.4
Depth
10.0 km
UTC time
2026-07-28 09:39:30 UTC
Local time
—
Country
Japan
State
Kumamoto Prefecture
City
Kosa
County
Kamimashiki County
Source
emsc
Coordinates
32.70000, 130.80000
Temperature
20.7°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 (33.8 km)
Regional average: 33.8 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

  • Asosan Activity reported
    Distance: 34 km ·Caldera ·Elevation: 1'592 m ·Last eruption: 2021 ·Japan
  • Unzendake
    Distance: 47 km ·Complex ·Elevation: 1'483 m ·Last eruption: 1996 ·Japan
  • Kujusan
    Distance: 60 km ·Stratovolcano(es) ·Elevation: 1'791 m ·Last eruption: 1996 ·Japan
  • Yufu-Tsurumi
    Distance: 85 km ·Lava dome(s) ·Last eruption: 867 ·Japan
  • Kirishimayama
    Distance: 85 km ·Shield ·Elevation: 1'700 m ·Last eruption: 2025 ·Japan
  • Yonemaru-Sumiyoshiike
    Distance: 105 km ·Maar(s) ·Elevation: 40 m ·Last eruption: -6200 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Kumamoto AirportJapan · KMJ · RJFT
    16.1 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-11-08

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

Yatsushiro

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 103 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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