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Japan · Chiba Prefecture

M3.3 Earthquake near Choshi, Chiba Prefecture (Japan)

UTC time: 2026-10-01 12:51:30 UTC Local time: —

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About this earthquake

On October 1, 2026 at 12:51 UTC, a magnitude M3.3 earthquake occurred near Choshi, Chiba Prefecture (Japan). The hypocenter lay relatively close to the surface at around 40 km, increasing how strongly it was felt. Shaking of this size is frequently noticed but usually harmless.

The data is provided by EMSC and cross-checked across seismological networks.

Details

ID
c2ef1dda2ac1e2761aa744948e375b25a00176b7
Magnitude
M3.3
Depth
40.0 km
UTC time
2026-10-01 12:51:30 UTC
Local time
—
Country
Japan
State
Chiba Prefecture
City
Choshi
Source
emsc
Coordinates
35.80000, 140.70000
Temperature
20.5°C

Depth profile

Depth profile Depth: 40 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 40 km
Shallow
40 km
40 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

  • Takaharayama
    Distance: 148 km ·Stratovolcano ·Elevation: 1'795 m ·Last eruption: -4570 ·Japan
  • Nantaisan
    Distance: 153 km ·Stratovolcano ·Elevation: 2'486 m ·Last eruption: -9540 ·Japan
  • Omanago Group
    Distance: 157 km ·Lava dome(s) ·Elevation: 2'341 m ·Last eruption: -3050 ·Japan
  • Akagisan
    Distance: 159 km ·Stratovolcano ·Elevation: 1'828 m ·Japan
  • Nasudake
    Distance: 161 km ·Stratovolcano(es) ·Elevation: 1'915 m ·Last eruption: 1963 ·Japan
  • Nikko-Shiranesan
    Distance: 163 km ·Shield ·Elevation: 2'578 m ·Last eruption: 1952 ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Narita International AirportJapan · NRT · RJAA
    28.3 kmStraight-line distance
  • Ibaraki AirportJapan · IBR · RJAH
    49.6 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, 23 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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