M 6.5 in Japan on 26 Mar 2026 14:18 UTC

Hazard models

Rapid Impact
Shakemap
Tsunami

Event summary

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

Earthquake Magnitude: 6.5M
Depth: 9.5 Km
Event Date: 26 Mar 2026 14:18 UTC
27 Mar 2026 00:18 Local
Exposed Population: 1.6 million in MMI IV
Source: NEIC us7000s7u4
Inserted at: 26 Mar 2026 14:37 UTC
INFORM Coping capacity of the alert score:
1.1 (Japan)

GDACS Score

For more info on GDACS score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0.2 0.2
us7000s7u4 Scaled population (raster) 0 Max wave alert 0.23m  
  C1 shakemap 0 Max wave realtime 0.23m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
Maximum expected impact using different data sources.
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Download Tsunami Travel Time:

Episode Timeline

IDLevelScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1695357 0 26 Mar 2026 14:18 5.8M, 16.7km 3.2 No people affected (in 100km) 00:10 ALASKA EC
1695358 0 26 Mar 2026 14:18 5.9M, 24.8km 3.67 1 thousand (in 100km) 00:10 ALASKA EC
1695359 0 26 Mar 2026 14:18 5.9M, 31.9km 3.69 4 thousand (in 100km) 00:11 ALASKA EC
1695360 0 26 Mar 2026 14:18 5.9M, 32.4km 3.69 50 thousand (in 100km) 00:13 ALASKA EC
1695363 0.2 26 Mar 2026 14:18 6.5M, 9.5km 4.34 N/A (in MMI>=VII) 0.2m (at 00:23) 00:18 NEIC
The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.
The episode that has the last updated information.
* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Tsunami affected locations

The maximum Wave height is  0.2m in Ishihama, Japan. This height is estimated for 26-Mar-2026 14:41:39.

Level Date (UTC) Name Country Wave height (m)
26-Mar-2026 14:41:39 Ishihama Japan  0.2
26-Mar-2026 14:43:32 Sukuiso Japan  0.2
26-Mar-2026 14:43:32 Oura Japan  0.2
26-Mar-2026 14:42:51 Heida Japan  0.2
26-Mar-2026 14:42:51 Shirahama Japan  0.2
26-Mar-2026 14:42:51 Iwate-Nanbu-Oki (South Iwate) GPS buoy  0.2
26-Mar-2026 14:45:57 Sakiyama Japan  0.2
26-Mar-2026 14:45:57 Taro Japan  0.2
26-Mar-2026 14:45:57 Sakikuwagasaki Japan  0.2
26-Mar-2026 14:45:57 Settai Japan  0.2
26-Mar-2026 14:46:03 Omoto Japan  0.2
26-Mar-2026 14:52:83 Shimanokoshi Japan  0.2
26-Mar-2026 14:52:83 Shimanokoe Japan  0.2
26-Mar-2026 14:44:66 Aonotaki Japan  0.2
26-Mar-2026 14:48:32 Kiriushi Japan  0.2
26-Mar-2026 14:41:39 Sasasawa Japan  0.2
26-Mar-2026 14:48:32 Fudai Japan  0.2
26-Mar-2026 14:43:19 Miyako  0.2
26-Mar-2026 14:41:26 Miyako Japan  0.2
26-Mar-2026 14:41:39 Anto Japan  0.2
26-Mar-2026 14:42:74 Kirikiri Japan  0.1
26-Mar-2026 14:43:32 Kami-Heida Japan  0.1
26-Mar-2026 14:43:32 bottom pressure cable TM2  0.1
26-Mar-2026 14:43:32 Funakoshi Japan  0.1
26-Mar-2026 14:43:32 Koyatori Japan  0.1
26-Mar-2026 14:45:27 Unozumai Japan  0.1
26-Mar-2026 14:45:27 Kamaishi Japan  0.1
26-Mar-2026 14:45:27 Ryoishi Japan  0.1
26-Mar-2026 14:45:27 Hakozaki Japan  0.1
26-Mar-2026 14:43:32 Oishi Japan  0.1
26-Mar-2026 14:48:52 Hamaiwaizumi Japan  0.1
26-Mar-2026 14:39:62 Iwate-Chubu-Oki (Central Iwate) GPS buoy  0.1
26-Mar-2026 14:53:25 Omoe Japan  0.1

See full locations list (RSS)


Initial conditions

Title: ""122 km E of Yamada""

Fault parameters

  • Latitude: 39.446
  • Longitude: 143.372
  • Length: 28 km
  • Width: 7 km
  • Magnitude: 6.5 M

Okada parameters:

  • Slip: .8 m
  • Strike: 185 (geogr angle: north=0, south=180)
  • Dip: 19 degree
  • Rake: 90 degree
  • Depth: 10 km

Calculation parameters

  • Calculation space (lon/lat): 141.872, 37.946, 144.872, 40.946
  • Instead of Step -> use Cell size:.25 minutes

Sea Level

More information

  • Timeline:
    Tsunami calculations performed to this case, click here

  • Montecarlo:
    Tsunami Montecarlo simulation performed to this case, click here

For a full list of available products related to this event, please refer to the GDACS Resources page.