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M5.8 Depth: 52.0 km

M5.8 Earthquake near Sammu, Chiba Prefecture (Japan)

UTC time: 2026-06-26 03:46:37 UTC Local time: —

About this earthquake

On June 26, 2026 at 03:46 UTC, a magnitude M5.8 earthquake occurred near Sammu, Chiba Prefecture (Japan). With a focal depth of about 52 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size can cause damage near the epicenter.

The data is provided by GFZ and cross-checked across seismological networks. Japan: 14 earthquakes were recorded in the past 24 hours, the strongest reaching M5.9.

Details

Magnitude
M5.8
Depth
52.0 km
UTC time
2026-06-26 03:46:37 UTC
Local time
—
Country
Japan
State
Chiba Prefecture
City
Sammu
Source
gfz
Coordinates
35.64000, 140.37000
Temperature
23.7°C

Map

Depth profile

Depth profile Depth: 52 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 52 km
Shallow
52 km
52 km — deeper than the regional average (35.4 km)
Regional average: 35.4 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

Green No or minimal impact expected.
Estimated population exposed
IV 37'244'608
V 87'953
35 Felt reports · max reported intensity 4.3

Ground shaking

V
Moderate · Intensity (MMI) V
Felt by all, slight damage possible.

Tectonic context

Located on the Okhotsk Plate.
Near the boundary Okhotsk ↔ Philippine Sea · about 109 km away

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation
Sanmu4.5 kmE48'444
Sakura15.0 kmNW173'740
Chiba23.3 kmW979'768

GeoNames · CC BY 4.0

Volcanoes nearby

  • Hakoneyama
    Distance: 130 km ·Complex ·Elevation: 1'438 m ·Last eruption: 2015 ·Japan
  • Izu-Oshima
    Distance: 135 km ·Stratovolcano ·Elevation: 746 m ·Last eruption: 1990 ·Japan
  • Izu-Tobu
    Distance: 142 km ·Pyroclastic cone(s) ·Elevation: 1'406 m ·Last eruption: 1989 ·Japan
  • Akagisan
    Distance: 147 km ·Stratovolcano ·Elevation: 1'828 m ·Japan
  • Nantaisan
    Distance: 148 km ·Stratovolcano ·Elevation: 2'486 m ·Last eruption: -9540 ·Japan
  • Takaharayama
    Distance: 150 km ·Stratovolcano ·Elevation: 1'795 m ·Last eruption: -4570 ·Japan

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#2
Earlier events M≥4128
Earlier events M≥531
Compared since2025-01-04

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M5.92026-06-26 03:46:36 UTC46.0 kmChoshi M5.82026-06-26 03:46:36 UTC12.7 kmYokoshibahikari M5.62026-06-16 10:46:27 UTC70.8 kmNoda M5.62026-06-16 10:46:27 UTC42.6 kmNear East Coast of Honshu, Japan M5.52026-06-16 10:46:28 UTC67.8 kmSugito

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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