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Japan · Kumamoto Prefecture

M4.8 Earthquake near Kamiamakusa, Kumamoto Prefecture (Japan)

UTC time: 2026-07-28 14:01:57 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude
M4.8
Depth
9.3 km
Source
USGS

Kumamoto Prefecture · Kamiamakusa

Country overview

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About this earthquake

A magnitude M4.8 earthquake was recorded near Kamiamakusa, Kumamoto Prefecture (Japan) on July 28, 2026 at 14:01 UTC. With a focal depth of about 9 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 data is provided by USGS and cross-checked across seismological networks. Japan: over the past 24 hours, QuakeMap24 logged 3 earthquakes, the strongest at M5.1.

Details

ID
38be03f6342dc1111506cc117a9425fc74cbcb45
Magnitude
M4.8
Depth
9.3 km
UTC time
2026-07-28 14:01:57 UTC
Local time
—
Country
Japan
State
Kumamoto Prefecture
City
Kamiamakusa
Source
usgs
Coordinates
32.53840, 130.49400
Temperature
29.3°C

Depth profile

Depth profile Depth: 9.3 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 9.3 km
Shallow
9.3 km
9.3 km — shallower than the regional average (33.1 km)
Regional average: 33.1 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

Tectonic context

Located on the Amur Plate.
Near the boundary Amur ↔ Okinawa · about 60 km away

Volcanoes nearby

  • Unzendake
    Distance: 31 km ·Complex ·Elevation: 1'483 m ·Last eruption: 1996 ·Japan
  • Asosan Activity reported
    Distance: 67 km ·Caldera ·Elevation: 1'592 m ·Last eruption: 2021 ·Japan
  • Kirishimayama
    Distance: 76 km ·Shield ·Elevation: 1'700 m ·Last eruption: 2025 ·Japan
  • Yonemaru-Sumiyoshiike
    Distance: 86 km ·Maar(s) ·Elevation: 40 m ·Last eruption: -6200 ·Japan
  • Kujusan
    Distance: 93 km ·Stratovolcano(es) ·Elevation: 1'791 m ·Last eruption: 1996 ·Japan
  • Aira Activity reported
    Distance: 108 km ·Caldera ·Elevation: 1'117 m ·Last eruption: 2026 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Amakusa AirportJapan · AXJ · RJDA
    32.0 kmStraight-line distance
  • Kumamoto AirportJapan · KMJ · RJFT
    47.4 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-09-21

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

21 Sep 2025 – 21 Sep 2026 · M ≥ 3.0 · 190 Catalogue entries

Of 189 other entries for this area and period, 6 have a higher stored magnitude. Different magnitude types and reports not yet merged limit the comparison.

Open seismic profile

Historic earthquake map · Japan

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Country statistics · Japan

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

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