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Japan

M4.0 Earthquake near NEAR EAST COAST OF HONSHU, JAPAN (Japan)

UTC time: 2025-08-28 09:31:30 UTC Local time: —

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About this earthquake

On August 28, 2025 at 09:31 UTC, a magnitude M4.0 earthquake occurred near NEAR EAST COAST OF HONSHU, JAPAN (Japan). The hypocenter lay relatively close to the surface at around 50 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 2 earthquakes, the strongest at M3.9.

Details

ID
d4e17ac91957b5b1618a5c5bb3acad42309880dc
Magnitude
M4.0
Depth
50.0 km
UTC time
2025-08-28 09:31:30 UTC
Local time
—
Country
Japan
City
shi juan shi
Source
emsc
Coordinates
38.30000, 141.80000
Temperature
25.6°C

Depth profile

Depth profile Depth: 50 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 50 km
Shallow
50 km
50 km — deeper than the regional average (33.2 km)
Regional average: 33.2 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

  • Naruko
    Distance: 104 km ·Caldera ·Elevation: 470 m ·Last eruption: 837 ·Japan
  • Kurikomayama
    Distance: 115 km ·Stratovolcano ·Last eruption: 1950 ·Japan
  • Zaozan [Zaosan]
    Distance: 120 km ·Complex ·Elevation: 1'841 m ·Last eruption: 1940 ·Japan
  • Hijiori
    Distance: 146 km ·Caldera ·Elevation: 552 m ·Japan
  • Azumayama
    Distance: 150 km ·Stratovolcano(es) ·Elevation: 1'949 m ·Last eruption: 1977 ·Japan
  • Adatarayama
    Distance: 152 km ·Stratovolcano(es) ·Elevation: 1'728 m ·Last eruption: 1996 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Nuclear power plants

  • Onagawa nuclear power plantJapanOut of operation · Operating at dataset date · Permanently shut downReactor units at site: 3
    28.3 kmStraight-line distance

Source: Global Energy Monitor · Global Nuclear Power Tracker · Dataset date: 2026-08

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

Japan

Context for this earthquake

04 Oct 2025 – 04 Oct 2026 · M ≥ 3.0 · 969 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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