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Japan · Chiba Prefecture

M4.3 Earthquake near Choshi, Chiba Prefecture (Japan)

UTC time: 2026-10-28 20:22:30 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded Content updated:

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

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About this earthquake

On October 28, 2026 at 20:22 UTC, a magnitude M4.3 earthquake occurred near Choshi, Chiba Prefecture (Japan). The hypocenter lay relatively close to the surface at around 26 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 USGS and cross-checked across seismological networks. Japan: over the past 24 hours, QuakeMap24 logged 3 earthquakes, the strongest at M3.4.

Details

ID
131e8148a87328064e524702b82f1fc62c754c34
Magnitude
M4.3
Depth
26.0 km
UTC time
2026-10-28 20:22:30 UTC
Local time
—
Country
Japan
State
Chiba Prefecture
City
Choshi
Source
usgs
Coordinates
35.64740, 140.88500
Temperature
16.8°C

Depth profile

Depth profile Depth: 26 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 26 km
Shallow
26 km
26 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

Volcanoes nearby

  • Izu-Oshima
    Distance: 170 km ·Stratovolcano ·Elevation: 758 m ·Last eruption: 1990 ·Japan
  • Takaharayama
    Distance: 171 km ·Stratovolcano ·Elevation: 1'795 m ·Last eruption: -4570 ·Japan
  • Hakoneyama
    Distance: 175 km ·Complex ·Elevation: 1'438 m ·Last eruption: 2015 ·Japan
  • Nantaisan
    Distance: 176 km ·Stratovolcano ·Elevation: 2'486 m ·Last eruption: -9540 ·Japan
  • Omanago Group
    Distance: 181 km ·Lava dome(s) ·Elevation: 2'341 m ·Last eruption: -3050 ·Japan
  • Izu-Tobu
    Distance: 182 km ·Pyroclastic cone(s) ·Elevation: 580 m ·Last eruption: 1989 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Narita International AirportJapan · NRT · RJAA
    46.8 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

Chiba Prefecture

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 34 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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