M 4.8 in Japan on 21 Apr 2026 02:35 UTC

Event summary

This earthquake can have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

GDACS ID EQ 1536564
Earthquake Magnitude: 4.8M
Depth: 35.4 Km
Lat/Lon: 39.8608 , 143.1656
Event Date: 21 Apr 2026 02:35 UTC
21 Apr 2026 12:35 Local
Exposed Population:
3 thousand in MMI>=II
Inserted at: 21 Apr 2026 02:57 UTC
INFORM Coping capacity:
1.1 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 GDACS score
NEIC 0 0
us6000srr7 Scaled population (vector) 0  
  C1 rapid impact 0  
  C2 rapid impact 0  
  Country Vulnerability 0  
  INFORM_normalised 0  
Maximum expected impact using different data sources.
Virtual OSOCC
Meteo assessment
Satellite products
Analytical products
Detailed event map. European Union, 2026. Map produced by EC-JRC.
The boundaries and the names shown on this map do not imply official endorsement or acceptance by the European Union.

Updates on volcanic activity (Smithsonian)

Latest media headlines

Japan earthquake raises risk of more 4/21/2026 9:08:00 AM.

An official of the Japan Meteorological Agency speaks near a monitor showing a tsunami alert during a news conference at the agency in Tokyo, Monday, April 20, 2026, after an earthquake that struck off the northern Japanese coast. (Masanori
...(more)
Seismic-like event, possible earthquake, reported few minutes ago Nort.. 4/21/2026 8:56:00 AM.

Yesterday, the Japan Meteorological Agency (JMA) forecast imminent tsunami waves for parts of Hokkaido, Aomori and Iwate prefectures, with the highest tsunami waves recorded at around 80cm on the east coast. Although all tsunami warnings an
...(more)
Earthquake of 7.4 magnitude hits Japan''s Northeastern coast; tsunami .. 4/21/2026 8:52:00 AM.

A powerful earthquake of magnitude 7.4 struck Japan’s Tohoku region on Monday at around 4:53 pm local time.
Terremoto in Giappone: scossa di magnitudo 7.7 fa scattare l’allerta t.. 4/21/2026 8:47:00 AM.

Una violenta scossa di magnitudo 7.7 ha colpito la costa orientale del Giappone, facendo scattare immediatamente l’allerta tsunami lungo gran parte dell’arcipelago. Il sisma, registrato alle prime ore del mattino, ha avuto epicentro al larg
...(more)

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Estimated casualties (PAGER)

USGS estimates the number of casualties for each earthquake for the Prompt Assessment of Global Earthquakes for Response (PAGER) product.
The graph shows the current fatalities estimate.

Exposed population

Data, images, links, services and documents

For this events, GDACS has links to information from the following sources: EC-JRC (41), NEIC (4), OCHA (1), WMO (1), (2), INFORM (2), USGS (2),