Back to map
Japan · Chiba Prefecture

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

UTC time: 2026-06-26 04:31:32 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.

Map

About this earthquake

On June 26, 2026 at 04:31 UTC, a magnitude M4.7 earthquake occurred near Asahi, Chiba Prefecture (Japan). The hypocenter lay relatively close to the surface at around 49 km, increasing how strongly it was felt. 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
fe30661a40e36c50b40f54b3669b683ebfe0139a
Magnitude
M4.7
Depth
49.0 km
UTC time
2026-06-26 04:31:32 UTC
Local time
—
Country
Japan
State
Chiba Prefecture
City
Asahi
Source
gfz
Coordinates
35.63000, 140.76000
Temperature
24.1°C

Depth profile

Depth profile Depth: 49 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 49 km
Shallow
49 km
49 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 115 km away

Volcanoes nearby

  • Izu-Oshima
    Distance: 160 km ·Stratovolcano ·Elevation: 758 m ·Last eruption: 1990 ·Japan
  • Hakoneyama
    Distance: 164 km ·Complex ·Elevation: 1'438 m ·Last eruption: 2015 ·Japan
  • Takaharayama
    Distance: 166 km ·Stratovolcano ·Elevation: 1'795 m ·Last eruption: -4570 ·Japan
  • Nantaisan
    Distance: 170 km ·Stratovolcano ·Elevation: 2'486 m ·Last eruption: -9540 ·Japan
  • Izu-Tobu
    Distance: 171 km ·Pyroclastic cone(s) ·Elevation: 580 m ·Last eruption: 1989 ·Japan
  • Omanago Group
    Distance: 174 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
    36.9 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

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.

Share