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Japan · Chiba Prefecture

M4.7 Earthquake near Asahi, Chiba Prefecture (Japan)

UTC time: 2026-06-26 04:00:09 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.

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About this earthquake

A magnitude M4.7 earthquake was recorded near Asahi, Chiba Prefecture (Japan) on June 26, 2026 at 04:00 UTC. With a focal depth of about 59 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 data is provided by GFZ and cross-checked across seismological networks.

Details

ID
aadcf62b9b1c9febd7d0de47128cab071190e5f6
Magnitude
M4.7
Depth
59.0 km
UTC time
2026-06-26 04:00:09 UTC
Local time
—
Country
Japan
State
Chiba Prefecture
City
Asahi
Source
gfz
Coordinates
35.68000, 140.65000
Temperature
23.7°C

Depth profile

Depth profile Depth: 59 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 59 km
Shallow
59 km
59 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

Tectonic context

Located on the Okhotsk Plate.
Near the boundary Okhotsk ↔ Philippine Sea · about 118 km away

Volcanoes nearby

  • Hakoneyama
    Distance: 156 km ·Complex ·Elevation: 1'438 m ·Last eruption: 2015 ·Japan
  • Izu-Oshima
    Distance: 156 km ·Stratovolcano ·Elevation: 758 m ·Last eruption: 1990 ·Japan
  • Takaharayama
    Distance: 157 km ·Stratovolcano ·Elevation: 1'795 m ·Last eruption: -4570 ·Japan
  • Nantaisan
    Distance: 159 km ·Stratovolcano ·Elevation: 2'486 m ·Last eruption: -9540 ·Japan
  • Akagisan
    Distance: 163 km ·Stratovolcano ·Elevation: 1'828 m ·Japan
  • Omanago Group
    Distance: 164 km ·Lava dome(s) ·Elevation: 2'341 m ·Last eruption: -3050 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Narita International AirportJapan · NRT · RJAA
    25.6 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-04

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

Chiba Prefecture

Context for this earthquake

04 Oct 2025 – 04 Oct 2026 · M ≥ 3.0 · 34 Catalogue entries

Of 33 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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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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