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M6.3 Earthquake

UTC time: 2026-04-20 07:52:58 UTC Local time: —
Earthquake newsQuakeMap24
Archive record · original publication time was not recorded

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

Magnitude
M6.3
Depth
33.0 km
Source
NNSN

Earthquake location (39.481, 142.115)

Map

M6.3 Earthquake · 2026-04-20 — Map showing the location of the epicenter
M6.3 Earthquake · 2026-04-20 — Map showing the location of the epicenter

About this earthquake

On April 20, 2026 at 07:52 UTC, a magnitude M6.3 earthquake occurred near Earthquake location (39.481, 142.115). With a focal depth of about 33 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Earthquakes of this magnitude can cause significant damage in populated areas.

The event was recorded by NNSN.

Details

ID
20ba8d71972f6132510774cf6b4b82dddbb002e6
Magnitude
M6.3
Depth
33.0 km
UTC time
2026-04-20 07:52:58 UTC
Local time
—
Country
—
Source
nnsn
Coordinates
39.48100, 142.11500

Depth profile

Depth profile Depth: 33 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 33 km
Shallow
33 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

Nearby population centers

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

PlaceDistanceDirectionPopulation
Yamada14.3 kmW15'195
Morioka86.2 kmW290'700
Sendai172.9 kmSW1'096'704

GeoNames · CC BY 4.0

Volcanoes nearby

  • Iwatesan Activity reported
    Distance: 104 km ·Complex ·Elevation: 2'038 m ·Last eruption: 1919 ·Japan
  • Akita-Komagatake
    Distance: 117 km ·Stratovolcano(es) ·Elevation: 1'637 m ·Last eruption: 1971 ·Japan
  • Hachimantai
    Distance: 120 km ·Stratovolcano ·Elevation: 1'613 m ·Last eruption: -5350 ·Japan
  • Akita-Yakeyama
    Distance: 128 km ·Stratovolcano ·Elevation: 1'366 m ·Last eruption: 1997 ·Japan
  • Kurikomayama
    Distance: 128 km ·Stratovolcano ·Last eruption: 1950 ·Japan
  • Naruko
    Distance: 146 km ·Caldera ·Elevation: 470 m ·Last eruption: 837 ·Japan

Radius · 100 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Iwate Hanamaki AirportJapan · HNA · RJSI
    84.3 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

Subsequent earthquakes nearby

Events recorded after this earthquake within 250 km. They are not automatically classified as aftershocks.

First 6 hours30
First 24 hours46
First 72 hours76
Strongest subsequent eventM7.5
M7.42026-04-20 07:52:59 UTC88.7 kmOff East Coast of Honshu, Japan M7.52026-04-20 07:52:59 UTC89.8 kmOff east coast of Honshu, Japan [Sea: Japan] M7.42026-04-20 07:53:00 UTC95.4 km###.# km ( ###.# mi) NW (az= 308.7) from Wendover, UT M5.32026-04-20 08:03:08 UTC170.3 kmOFF EAST COAST OF HONSHU, JAPAN M4.12026-04-20 08:08:46 UTC142.3 km M5.22026-04-20 08:08:54 UTC120.6 kmNEAR EAST COAST OF HONSHU, JAPAN M4.12026-04-20 08:14:48 UTC70.0 km M4.42026-04-20 08:15:19 UTC139.5 km M4.12026-04-20 08:23:47 UTC142.3 km M4.32026-04-20 08:30:10 UTC70.0 km M4.82026-04-20 08:32:42 UTC156.6 km M5.62026-04-20 08:32:43 UTC94.1 kmOFF EAST COAST OF HONSHU, JAPAN

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Historical context nearby

Comparison with recorded earthquakes before this event within 250 km.

Magnitude rank#33
Earlier events M≥4628
Earlier events M≥5319
Compared since2025-01-05

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

Strongest earlier events

M7.72025-12-08 14:15:13 UTC168.7 km M7.62026-04-20 07:52:57 UTC109.4 kmOff East Coast of Honshu, Japan M7.62025-12-08 14:15:12 UTC172.8 kmHOKKAIDO, JAPAN REGION M7.62025-12-08 14:15:10 UTC173.7 km74 km ENE of Misawa, Japan M7.62025-12-08 14:15:09 UTC169.6 km84 km ENE of Misawa, Japan

Stats (last 24h)

Global (24h)
473
Country (24h)
—
—
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