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Japan · Iwate Prefecture

M3.1 Earthquake near Kamaishi, Iwate Prefecture (Japan)

UTC time: 2026-08-01 23:17:30 UTC Local time: —

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About this earthquake

A magnitude M3.1 earthquake was recorded near Kamaishi, Iwate Prefecture (Japan) on August 1, 2026 at 23:17 UTC. With a focal depth of about 50 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Shaking of this size is frequently noticed but usually harmless.

The data is provided by EMSC and cross-checked across seismological networks. Japan: over the past 24 hours, QuakeMap24 logged 3 earthquakes, the strongest at M5.1.

Details

ID
1e334dc08d96da8e538fcd3f609168e9947739b9
Magnitude
M3.1
Depth
50.0 km
UTC time
2026-08-01 23:17:30 UTC
Local time
—
Country
Japan
State
Iwate Prefecture
City
Kamaishi
Source
emsc
Coordinates
39.20000, 142.20000
Temperature
21.7°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 (33.1 km)
Regional average: 33.1 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

  • Kurikomayama
    Distance: 125 km ·Stratovolcano ·Last eruption: 1950 ·Japan
  • Iwatesan Activity reported
    Distance: 126 km ·Complex ·Elevation: 2'038 m ·Last eruption: 1919 ·Japan
  • Akita-Komagatake
    Distance: 135 km ·Stratovolcano(es) ·Elevation: 1'637 m ·Last eruption: 1971 ·Japan
  • Naruko
    Distance: 137 km ·Caldera ·Elevation: 470 m ·Last eruption: 837 ·Japan
  • Hachimantai
    Distance: 143 km ·Stratovolcano ·Elevation: 1'613 m ·Last eruption: -5350 ·Japan
  • Akita-Yakeyama
    Distance: 150 km ·Stratovolcano ·Elevation: 1'366 m ·Last eruption: 1997 ·Japan

Japan

Context for this earthquake

21 Sep 2025 – 21 Sep 2026 · M ≥ 3.0 · 951 Catalogue entries

Of 950 other entries for this area and period, 752 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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Country statistics · Japan

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View earthquake KPIs, strongest and latest events, and averages for this country.

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