Overall Orange Earthquake in Japan on 20 Apr 2026 07:53 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

M 7.4 Earthquake and Tsunami (1 m) in Japan on 20 Apr 2026 07:53 UTC

Hazard models

Rapid Impact

Shakemap

Tsunami

Event summary

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

Earthquake Magnitude:	7.4M
Depth:	35 Km
Event Date:	20 Apr 2026 07:53 UTC 20 Apr 2026 17:53 Local
Exposed Population:	70 thousand in MMI VI
Source:	NEIC us6000sri7
Inserted at:	20 Apr 2026 08:12 UTC
INFORM Coping capacity of the alert score:	1.1 (Japan)
Maximun Wave Height observed:	0.16 m

GDACS Score

For more info on GDACS score click here.

	Earthquake (Shakemap)		Tsunami		GDACS score
NEIC	0		1		1
us6000sri7	Scaled population (raster)	0	Max wave scenario	0.61m
	C1 shakemap	-0.59	Max wave realtime	1.01m
	C2 shakemap	0.53
	Country Vulnerability	0
	INFORM_normalised	0.57

Maximum expected impact using different data sources.

Click on images to zoom it.

Download Tsunami Travel Time:

Episode Timeline

ID	Level	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1701062		1.2	20 Apr 2026 07:52	7.4M, 10km	N/A	170 thousand (in 100km)	1.5m (at 00:28)	00:10	PTWC
1701063		1	20 Apr 2026 07:53	7.4M, 35km	5.99	N/A (in MMI>=VII)	1m (at 00:27)	00:19	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.

Estimated Tsunami affected locations

The maximum observed wave height is 0.16m in Ofunato Honshu Jp;
The maximum Wave height is 1.0m in Kiriushi, Japan. This height is estimated for 20-Apr-2026 08:20:72.

Level	Date (UTC)	Name	Country	Wave height (m)
	20-Apr-2026 08:20:72	Kiriushi	Japan	1.0
	20-Apr-2026 08:20:72	Shimanokoshi	Japan	1.0
	20-Apr-2026 08:20:72	Shimanokoe	Japan	1.0
	20-Apr-2026 08:26:67	Noda	Japan	1.0
	20-Apr-2026 08:26:67	Tamagawa	Japan	1.0
	20-Apr-2026 08:26:67	Kuki	Japan	1.0
	20-Apr-2026 08:23:06	Noda-Tamagawa	Japan	0.8
	20-Apr-2026 08:23:06	Horinai	Japan	0.8
	20-Apr-2026 08:19:46	Sakikuwagasaki	Japan	0.7
	20-Apr-2026 08:19:46	Sasasawa	Japan	0.7
	20-Apr-2026 08:19:46		Miyako	0.7
	20-Apr-2026 08:17:33	Omoto	Japan	0.6
	20-Apr-2026 08:17:33	Aonotaki	Japan	0.6
	20-Apr-2026 08:17:33	Taro	Japan	0.6
	20-Apr-2026 08:18:38	Fudai	Japan	0.5
	20-Apr-2026 08:26:02	Honnami	Japan	0.5
	20-Apr-2026 08:26:02	Kuji	Japan	0.5
	20-Apr-2026 08:26:02	Ojiri	Japan	0.5
	20-Apr-2026 08:26:02	Minami-Samuraihama	Japan	0.5
	20-Apr-2026 08:26:02	Kosode	Japan	0.5
	20-Apr-2026 08:24:79	Kita-Samuraihama	Japan	0.5
	20-Apr-2026 09:47:67	Yokawame	Japan	0.4
	20-Apr-2026 09:47:67	Omisawa	Japan	0.4
	20-Apr-2026 09:47:67	Mikawame	Japan	0.4
	20-Apr-2026 09:47:67	Futakawame	Japan	0.4
	20-Apr-2026 08:23:43	Shiromae	Japan	0.4
	20-Apr-2026 08:14:64	Ishihama	Japan	0.4
	20-Apr-2026 09:38:76	Yagi	Japan	0.4
	20-Apr-2026 09:45:61	Hitokawame	Japan	0.4
	20-Apr-2026 09:45:61	Kawaguchi	Japan	0.4
	20-Apr-2026 09:45:61	Ichikawa	Japan	0.4
	20-Apr-2026 09:10:77	Kamaishi	Japan	0.3
	20-Apr-2026 09:10:77	Heida	Japan	0.3
	20-Apr-2026 09:10:77	Shirahama	Japan	0.3
	20-Apr-2026 08:55:85	Erimo	Japan	0.3
	20-Apr-2026 09:53:11	Ichiyanagi	Japan	0.3
	20-Apr-2026 09:53:11	Kurauchi	Japan	0.3
	20-Apr-2026 09:53:11	Amagamori	Japan	0.3
	20-Apr-2026 09:53:11	Sunagamori	Japan	0.3
	20-Apr-2026 08:30:05	Okkoshi	Japan	0.3
	20-Apr-2026 08:30:05	Kadonohama	Japan	0.3
	20-Apr-2026 08:30:05	Kawajiri	Japan	0.3
	20-Apr-2026 09:19:67	Samani	Japan	0.3
	20-Apr-2026 08:13:96		Iwate-Chubu-Oki (Central Iwate) GPS buoy	0.3
	20-Apr-2026 08:18:91	Funakoshi	Japan	0.3
	20-Apr-2026 08:18:91	Koyatori	Japan	0.3
	20-Apr-2026 09:49:35	Mukawame	Japan	0.3
	20-Apr-2026 09:49:35	Sabishiro	Japan	0.3
	20-Apr-2026 09:12:63	Tamagawa	Japan	0.3
	20-Apr-2026 09:12:63	Taneichi	Japan	0.3
	20-Apr-2026 09:33:55	Hachinohe	Japan	0.3
	20-Apr-2026 09:33:55	Shirahama	Japan	0.3
	20-Apr-2026 09:44:88	Imaizumi	Japan	0.3
	20-Apr-2026 09:44:88	Koharagi	Japan	0.3
	20-Apr-2026 09:44:88	Rikuzen-Takata	Japan	0.3
	20-Apr-2026 09:44:88	Wakinosawa	Japan	0.3
	20-Apr-2026 09:44:88	Kogakuchi	Japan	0.3
	20-Apr-2026 09:44:88	Hosaura	Japan	0.3
	20-Apr-2026 09:44:88	Kurosaki	Japan	0.3
	20-Apr-2026 09:17:32	Ommaehama	Japan	0.3
	20-Apr-2026 09:17:32	Funagoshi	Japan	0.3
	20-Apr-2026 09:17:32	Tatsuhama	Japan	0.3
	20-Apr-2026 09:17:32	Ohama	Japan	0.3
	20-Apr-2026 09:17:32	Izushima	Japan	0.3
	20-Apr-2026 09:17:32	Kuwahama	Japan	0.3
	20-Apr-2026 09:17:32	Kumazawa	Japan	0.3
	20-Apr-2026 09:17:32	Osu	Japan	0.3
	20-Apr-2026 08:59:46	Chipira	Japan	0.3
	20-Apr-2026 08:12:99	Sukuiso	Japan	0.2
	20-Apr-2026 08:12:99	Oura	Japan	0.2
	20-Apr-2026 08:46:84	Hakozaki	Japan	0.2
	20-Apr-2026 08:13:28		Iwate-Hokubu-Oki (North Iwate) GPS buoy	0.2
	20-Apr-2026 09:47:67	Nishicha	Japan	0.2
	20-Apr-2026 08:27:85	Kawasiri	Japan	0.2
	20-Apr-2026 08:31:65	Okuki	Japan	0.2
	20-Apr-2026 08:31:65	Kanahama	Japan	0.2
	20-Apr-2026 08:45:47		Iwate-Nanbu-Oki (South Iwate) GPS buoy	0.2
	20-Apr-2026 08:51:04	Oishi	Japan	0.2
	20-Apr-2026 10:40:67	Ikenohama	Japan	0.2
	20-Apr-2026 10:40:67	Kobuchi	Japan	0.2
	20-Apr-2026 10:40:67	Oharahama	Japan	0.2
	20-Apr-2026 09:35:19	Tomari	Japan	0.2
	20-Apr-2026 09:35:19	Yoriiso	Japan	0.2
	20-Apr-2026 10:14:63	Horoizumi	Japan	0.2
	20-Apr-2026 09:08:52	Terama	Japan	0.2
	20-Apr-2026 08:51:04	Sakihama	Japan	0.2
	20-Apr-2026 10:41:94	Shiriya	Japan	0.2
	20-Apr-2026 08:42:08	Hararo	Japan	0.2
	20-Apr-2026 08:43:94	Hashimukai	Japan	0.2
	20-Apr-2026 08:55:85	Koishihama	Japan	0.2
	20-Apr-2026 09:53:48	Tomari	Japan	0.2
	20-Apr-2026 10:41:94	Kerimabu	Japan	0.2
	20-Apr-2026 11:07:25	Aratohama	Japan	0.2
	20-Apr-2026 11:07:25	Isatomae	Japan	0.2
	20-Apr-2026 11:07:25	Minato	Japan	0.2
	20-Apr-2026 11:07:25	Natari	Japan	0.2
	20-Apr-2026 11:07:25	Tomarihama	Japan	0.2
	20-Apr-2026 10:28:41	Kurambetsu	Japan	0.2
	20-Apr-2026 10:17:25	Sekine	Japan	0.2
	20-Apr-2026 10:17:25		Shimokita	0.2
	20-Apr-2026 09:54:13	Shimo-Funato	Japan	0.2
	20-Apr-2026 09:54:13	Nagasaki	Japan	0.2
	20-Apr-2026 09:54:13	Attari	Japan	0.2
	20-Apr-2026 09:54:13	Ryori	Japan	0.2
	20-Apr-2026 09:54:13	Ofunato	Japan	0.2
	20-Apr-2026 09:54:13		Ofunato	0.2
	20-Apr-2026 10:13:34	Ogifushi	Japan	0.2
	20-Apr-2026 10:55:51	Motoyoshi	Japan	0.2
	20-Apr-2026 10:55:51	Kesaiso	Japan	0.2
	20-Apr-2026 10:55:51	Hiraiso	Japan	0.2
	20-Apr-2026 10:55:51	Oya	Japan	0.2
	20-Apr-2026 10:55:51	Akuao	Japan	0.2
	20-Apr-2026 10:28:84	Niiyama	Japan	0.2
	20-Apr-2026 10:28:84	Aji	Japan	0.2
	20-Apr-2026 10:28:84	Kukunari	Japan	0.2
	20-Apr-2026 10:28:84	Futawatashi	Japan	0.2
	20-Apr-2026 10:28:84	Ayukawahama	Japan	0.2
	20-Apr-2026 10:28:84	Oshika	Japan	0.2
	20-Apr-2026 10:28:84		Ayukawa	0.2
	20-Apr-2026 09:05:13	Dedo	Japan	0.2
	20-Apr-2026 10:23:55	Tsukihama	Japan	0.2
	20-Apr-2026 10:23:55	Aikawa	Japan	0.2
	20-Apr-2026 10:23:55	Ozashi	Japan	0.2
	20-Apr-2026 10:14:63	Hiroo	Japan	0.2
	20-Apr-2026 10:14:63	Kami-notsuka	Japan	0.2
	20-Apr-2026 09:53:87	Tadagoe	Japan	0.1
	20-Apr-2026 09:03:37	Onitoppu	Japan	0.1
	20-Apr-2026 09:57:79	Kodanosawa	Japan	0.1
	20-Apr-2026 09:56:04	Shuku	Japan	0.1
	20-Apr-2026 10:23:03	Terahama	Japan	0.1
	20-Apr-2026 10:23:03	Kodaki	Japan	0.1
	20-Apr-2026 10:18:92	Niikappu	Japan	0.1
	20-Apr-2026 11:07:25	Atsugacho	Japan	0.1
	20-Apr-2026 09:51:43	Kushiro	Japan	0.1
	20-Apr-2026 09:39:32	Aiboshima	Japan	0.1
	20-Apr-2026 09:22:64	Okubo	Japan	0.1
	20-Apr-2026 09:22:64	Nonomae	Japan	0.1
	20-Apr-2026 10:36:01	Urakawa	Japan	0.1
	20-Apr-2026 11:20:92	Shikkari	Japan	0.1
	20-Apr-2026 09:28:23	Mombetsu	Japan	0.1
	20-Apr-2026 10:53:23	Takenohama	Japan	0.1
	20-Apr-2026 10:53:23	Fukkiura	Japan	0.1
	20-Apr-2026 10:53:23	Koamikura	Japan	0.1
	20-Apr-2026 10:53:23	Yagawa	Japan	0.1
	20-Apr-2026 10:53:23	Samenoura	Japan	0.1
	20-Apr-2026 11:37:73	Hakodate	Japan	0.1
	20-Apr-2026 11:37:73	Yukawa	Japan	0.1
	20-Apr-2026 11:37:73		Hakodate	0.1
	20-Apr-2026 10:02:21	Uranohama	Japan	0.1
	20-Apr-2026 10:02:21	Sakihama	Japan	0.1
	20-Apr-2026 10:02:21	Kesennuma	Japan	0.1
	20-Apr-2026 10:28:08	Shizunai	Japan	0.1
	20-Apr-2026 09:37:14	Shiranuka	Japan	0.1
	20-Apr-2026 09:31:85	Kawamukai	Japan	0.1
	20-Apr-2026 10:38:12	Svetloye	Japan	0.1
	20-Apr-2026 10:48:24	Yunokawa	Japan	0.1
	20-Apr-2026 09:13:69	Kayahama	Japan	0.1
	20-Apr-2026 09:05:16	Tomari	Japan	0.1
	20-Apr-2026 10:31:55	Netanai	Japan	0.1
	20-Apr-2026 11:05:63	Ohata	Japan	0.1
	20-Apr-2026 09:51:43		Kushiro	0.1
	20-Apr-2026 10:11:36	Mo-chirippu	Japan	0.1
	20-Apr-2026 11:20:34	Asshinai	Japan	0.1
	20-Apr-2026 11:13:74	Ishisaki	Japan	0.1
	20-Apr-2026 10:18:19	Otsu	Japan	0.1
	20-Apr-2026 11:28:95	Kotake	Japan	0.1
	20-Apr-2026 09:07:85	Oragahama	Japan	0.1
	20-Apr-2026 09:46:66	Higata	Japan	0.1
	20-Apr-2026 09:46:66	Muroran	Japan	0.1
	20-Apr-2026 09:13:35	Minami-Ibi	Japan	0.1
	20-Apr-2026 10:23:03	Ninokura	Japan	0.1
	20-Apr-2026 10:23:03	Ainokama	Japan	0.1
	20-Apr-2026 10:23:03	Kita-Kama	Japan	0.1
	20-Apr-2026 10:23:03	Fujitsuka	Japan	0.1
	20-Apr-2026 09:25:63	Kasano	Japan	0.1
	20-Apr-2026 09:25:63	Hanagama	Japan	0.1
	20-Apr-2026 11:18:39	Hikiushi	Japan	0.1
	20-Apr-2026 10:19:78	Shiogama	Japan	0.1
	20-Apr-2026 10:19:78	Shobudahama	Japan	0.1
	20-Apr-2026 10:19:78	Uenodai	Japan	0.1
	20-Apr-2026 09:24:53	Arahama	Japan	0.1
	20-Apr-2026 09:24:53	Kabasaki	Japan	0.1
	20-Apr-2026 09:41:85	Matsuzaki	Japan	0.1
	20-Apr-2026 08:41:47	Atoega	Japan	0.1
	20-Apr-2026 08:40:11	Kombumori	Japan	0.1
	20-Apr-2026 11:13:93	Toi	Japan	0.1
	20-Apr-2026 09:33:16	Horobetsu	Japan	0.1
	20-Apr-2026 09:33:16	Noboribetsu	Japan	0.1
	20-Apr-2026 08:49:15	Ombetsu	Japan	0.1
	20-Apr-2026 08:54:41	Nemuro	Japan	0.1
	20-Apr-2026 08:54:41	Tomoshiri	Japan	0.1
	20-Apr-2026 10:09:63	Yotsukura	Japan	0.1
	20-Apr-2026 10:47:48	Kami-Asamigawa	Japan	0.1
	20-Apr-2026 10:47:48	Shimo-Kitabo	Japan	0.1
	20-Apr-2026 09:57:63	Mori	Japan	0.1
	20-Apr-2026 10:18:19	Isobe	Japan	0.1
	20-Apr-2026 09:43:93	Riyaushi	Russia	0.1
	20-Apr-2026 09:22:04	Shinhama	Japan	0.1
	20-Apr-2026 09:22:04	Wada-Shinden	Japan	0.1
	20-Apr-2026 09:22:04	Gamo	Japan	0.1
	20-Apr-2026 09:50:35	Iso	Japan	0.1
	20-Apr-2026 09:23:24	Ido	Japan	0.1
	20-Apr-2026 09:23:24	Fukanuma	Japan	0.1
	20-Apr-2026 09:25:53	Tsurishi	Japan	0.1
	20-Apr-2026 09:50:01	Shimoburo	Japan	0.1
	20-Apr-2026 09:53:11	Ikokuma	Japan	0.1
	20-Apr-2026 09:10:77	Kiritappu	Japan	0.1
	20-Apr-2026 09:32:46	Shiraoi	Japan	0.1
	20-Apr-2026 09:36:16	Akkeshi	Japan	0.1
	20-Apr-2026 09:33:55	Nishikioka	Japan	0.1
	20-Apr-2026 11:28:08	Tomakomai	Japan	0.1
	20-Apr-2026 11:35:73	Terashita	Japan	0.1
	20-Apr-2026 11:35:73	Soeno	Japan	0.1
	20-Apr-2026 11:35:73	Obama	Japan	0.1
	20-Apr-2026 11:35:73		Onahama	0.1
	20-Apr-2026 11:35:14	Hirakata	Japan	0.1
	20-Apr-2026 11:33:25	Kamuso	Japan	0.1
	20-Apr-2026 08:45:47	Shoro	Japan	0.1
	20-Apr-2026 08:50:67	Kumadomari	Japan	0.1
	20-Apr-2026 08:50:67	Nassafu	Japan	0.1
	20-Apr-2026 09:40:84	Shinryu	Japan	0.1
	20-Apr-2026 08:53:39	Hanasaki	Japan	0.1
	20-Apr-2026 08:53:39		Hanasaki	0.1
	20-Apr-2026 08:58:77	Shikabe	Japan	0.1
	20-Apr-2026 08:53:78	Kambaraiso	Russia	0.1
	20-Apr-2026 11:32:02	Kitsunezaki	Japan	0.1
	20-Apr-2026 11:08:55	Hashikure	Japan	0.1
	20-Apr-2026 11:32:28	Date	Japan	0.1
	20-Apr-2026 11:11:67	Kikonai	Japan	0.1
	20-Apr-2026 09:57:79	Ishikura	Japan	0.1
	20-Apr-2026 09:44:88	Nov'	Russia	0.1
	20-Apr-2026 09:19:67	Todohokke	Japan	0.1
	20-Apr-2026 09:31:11		Miyagi-Chubu-Oki (Central Miyagi) GPS Buoy	0.1
	20-Apr-2026 11:23:61	Oji	Japan	0.1
	20-Apr-2026 10:32:43	Nitoda	Japan	0.1
	20-Apr-2026 10:32:43	Odomari	Japan	0.1
	20-Apr-2026 08:52:24	Kekkyowan	Russia	0.1
	20-Apr-2026 11:15:88	Toyoma	Japan	0.1
	20-Apr-2026 11:20:92	Shirane	Japan	0.1
	20-Apr-2026 09:06:44	Yatabe	Japan	0.1
	20-Apr-2026 11:20:34	Toyooka	Japan	0.1
	20-Apr-2026 11:20:34	Kuji	Japan	0.1
	20-Apr-2026 11:35:75	Yunami	Japan	0.1
	20-Apr-2026 09:43:93	Rokko	Russia	0.1
	20-Apr-2026 10:37:24	Otlivnyy	Russia	0.1
	20-Apr-2026 10:08:88	Rebun	Japan	0.1
	20-Apr-2026 10:21:96	Oshamambe	Japan	0.1
	20-Apr-2026 11:15:95	Yamagoshi	Japan	0.1
	20-Apr-2026 10:45:63	Kuroiwa	Japan	0.1

See full locations list (RSS)

Initial conditions

Title: ""M 7.4, 100 km ENE of Miyako, Japan""

Fault parameters

Latitude: 39.953
Longitude: 143.046
Length: 79 km
Width: 22 km
Magnitude: 7.4 M

Okada parameters:

Slip: 2 m
Strike: 185 (geogr angle: north=0, south=180)
Dip: 21 degree
Rake: 90 degree
Depth: 35 km

Calculation parameters

Calculation space (lon/lat): 135.546, 32.453, 150.546, 47.453
Instead of Step -> use Cell size:1.25 minutes

Sea Level

More information

Timeline:
Tsunami calculations performed to this case, click here
Montecarlo:
Tsunami Montecarlo simulation performed to this case, click here

Tsunami scenario database:
http://www.gdacs.org/tsunami/TsunamiGrid/Disk2/MAG_750/P1430^P0400^0750/locations.xml
Populated places affected by tsunami:
https://webcritech.jrc.ec.europa.eu/ModellingOutput/TsunamiSurge/JETS_System/2026/04/36293/locations.xml
Populated places affected by tsunami (KML):
https://webcritech.jrc.ec.europa.eu/ModellingOutput/TsunamiSurge/JETS_System/2026/04/36293/locations.kml

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

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