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Japan · Kumamoto Prefecture

M4.2 Earthquake near Kosa, Kumamoto Prefecture (Japan)

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

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About this earthquake

A magnitude M4.2 earthquake was recorded near Kosa, Kumamoto Prefecture (Japan) on July 28, 2026 at 07:39 UTC. With a focal depth of about 10 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Tremors of this size are distinctly felt and can occasionally cause light damage.

The event was recorded by EMSC. Japan: 4 earthquakes were recorded in the past 24 hours, the strongest reaching M4.1.

Details

ID
b518104bc5e6ca97f7788bc503f8a3d879649e3a
Magnitude
M4.2
Depth
10.0 km
UTC time
2026-07-28 07:39:30 UTC
Local time
—
Country
Japan
State
Kumamoto Prefecture
City
Kosa
County
Kamimashiki County
Source
emsc
Coordinates
32.70000, 130.80000
Temperature
23.5°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 (33.9 km)
Regional average: 33.9 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

Felt reports

1felt reports at EMSC / LastQuake

Voluntary reports of feeling this earthquake. The count is not an intensity measurement and is not added to USGS DYFI reports.

Data updated: Jul 28, 2026, 7:40 AM UTC · Last checked: Sep 6, 2026, 12:18 PM UTC

Source: EMSC / LastQuake

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: 2026-11-05

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

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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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