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Japan · Chiba Prefecture

M4.4 Earthquake near Asahi, Chiba Prefecture (Japan)

UTC time: 2026-10-28 18:32:30 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 18:32 UTC, a magnitude M4.4 earthquake occurred near Asahi, Chiba Prefecture (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 data is provided by EMSC and cross-checked across seismological networks. Japan: 3 earthquakes were recorded in the past 24 hours, the strongest reaching M3.4.

Details

ID
d90218b1dbc8a1cde437a74c48c830aefb593000
Magnitude
M4.4
Depth
50.0 km
UTC time
2026-10-28 18:32:30 UTC
Local time
—
Country
Japan
State
Chiba Prefecture
City
Asahi
Source
emsc
Coordinates
35.70000, 140.70000
Temperature
14.7°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 (33.9 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

Estimated impact

1 Felt reports · max reported intensity 1

Tectonic context

Located on the Okhotsk Plate.
Near the boundary Okhotsk ↔ Philippine Sea · about 116 km away

Volcanoes nearby

  • Takaharayama
    Distance: 157 km ·Stratovolcano ·Elevation: 1'795 m ·Last eruption: -4570 ·Japan
  • Nantaisan
    Distance: 161 km ·Stratovolcano ·Elevation: 2'486 m ·Last eruption: -9540 ·Japan
  • Hakoneyama
    Distance: 161 km ·Complex ·Elevation: 1'438 m ·Last eruption: 2015 ·Japan
  • Izu-Oshima
    Distance: 161 km ·Stratovolcano ·Elevation: 758 m ·Last eruption: 1990 ·Japan
  • Omanago Group
    Distance: 165 km ·Lava dome(s) ·Elevation: 2'341 m ·Last eruption: -3050 ·Japan
  • Akagisan
    Distance: 166 km ·Stratovolcano ·Elevation: 1'828 m ·Japan

Radius · 50 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Narita International AirportJapan · NRT · RJAA
    29.1 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

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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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