M 6.6 in Japan from 01 May 2021 01:27 UTC to 01:27

Hazard models

EQ parameters
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: 6.6M
Depth: 56 Km
Lat/Lon: 38.1 , 141.8
Event Date: 01 May 2021 01:27 UTC
01 May 2021 10:27 Local
Exposed Population: 2180000 people within 100km
Source: PTWC pt21121000
Inserted at: 01 May 2021 01:36 UTC
INFORM Coping capacity of the alert score
1.5 (Japan)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
PTWC 0.1 0 0.1
pt21121000 Scaled population (vector) 5.57 Max wave alert 0m  
  C1 earthquake 0.73 Max wave realtime 0m  
  C2 earthquake -0.22      
  Country Vulnerability -0.71      
  INFORM_normalised 0.57      
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1372992 0.1 01 May 2021 01:27 6.6M, 56km N/A 2.2 million (in 100km) 0m (at 00:00) 00:08 PTWC
1372994 0.1 01 May 2021 01:27 6.6M, 56km N/A 2.2 million (in 100km) 0m (at 00:00) 00:14 NTWC
1372999 0 01 May 2021 01:27 6.8M, 47.3km 6.42 N/A (in MMI>=VII) 0.1m (at 00:52) 00:21 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.

Exposed population

The earthquake happened in Japan , Region of Tohoku (population 9,984,608) . The nearest places are Futawatashi, Oshika, Ayukawahama, Niiyama, Aji, Ikenohama, Kukunari, Oharahama, Tomari, Kobuchi, and Sendai.

Radius Population
100 km 2.2 million people
75 km 310000 people
50 km 18000 people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Tohoku Japan 10 million people
Kanto Japan 38.5 million people
Chubu Japan 5.2 million people
Hokkaido Japan 5.8 million people

Affected populated places

Name Region Province Country City class Population Distance
Futawatashi Miyagi Japan Village - 32 km
Oshika Miyagi Japan Village - 33 km
Ayukawahama Miyagi Japan Village - 34 km
Niiyama Miyagi Japan Village - 34 km
Aji Miyagi Japan Village - 34 km
Ikenohama Miyagi Japan Village - 35 km
Kukunari Miyagi Japan Village - 36 km
Oharahama Miyagi Japan Village - 37 km
Tomari Miyagi Japan Village - 37 km
Kobuchi Miyagi Japan Village - 38 km
Yoriiso Miyagi Japan Village - 40 km
Nitoda Miyagi Japan Village - 40 km
Odomari Miyagi Japan Village - 40 km
Yagawa Miyagi Japan Village - 41 km
Koamikura Miyagi Japan Village - 41 km
Samenoura Miyagi Japan Village - 42 km
Fukkiura Miyagi Japan Village - 42 km
Kitsunezaki Miyagi Japan Village - 43 km
Takenohama Miyagi Japan Village - 43 km
Terama Miyagi Japan Village - 45 km
Izushima Miyagi Japan Village - 47 km
Kotake Miyagi Japan Village - 48 km
Onagawahama Miyagi Japan Village - 49 km
Ommaehama Miyagi Japan Village - 50 km
Kuwahama Miyagi Japan Village - 50 km
Kumazawa Miyagi Japan Village - 51 km
Tatsuhama Miyagi Japan Village - 51 km
Osu Miyagi Japan Village - 52 km
Watanoha Miyagi Japan Village - 52 km
Ohama Miyagi Japan Village - 53 km
Ogatsu Miyagi Japan Village - 54 km
Funagoshi Miyagi Japan Village - 54 km
Inai Miyagi Japan Village - 56 km
Mizunuma Miyagi Japan Village - 57 km
Ishinomaki Miyagi Japan City 120000 people 57 km
Moto-Funaba Miyagi Japan Village - 59 km
Nagatsura Miyagi Japan Village - 59 km
Higashi-Fukuda Miyagi Japan Village - 60 km
Tsukihama Miyagi Japan Village - 60 km
Kamata Miyagi Japan Village - 62 km
Ozashi Miyagi Japan Village - 62 km
Tsukihama Miyagi Japan Village - 62 km
Aikawa Miyagi Japan Village - 62 km
Kanomata Miyagi Japan Village - 62 km
Iinogawa Miyagi Japan Village - 62 km
Onagawa Miyagi Japan Village - 63 km
Kodaki Miyagi Japan Village - 63 km
Yamane Miyagi Japan Village - 63 km
Hamaichi Miyagi Japan Village - 63 km
Terahama Miyagi Japan Village - 64 km
Saragai Miyagi Japan Village - 64 km
Naka-Komatsu Miyagi Japan Village - 65 km
Iwasaki Miyagi Japan Village - 65 km
Sunaoshi Miyagi Japan Village - 65 km
Shinden Miyagi Japan Village - 65 km
Takagi Miyagi Japan Village - 66 km
Ono Miyagi Japan Village - 66 km
Hirobuchi Miyagi Japan Village - 66 km
Nojiri Miyagi Japan Village - 67 km
Ota Miyagi Japan Village - 67 km
Uenodai Miyagi Japan Village - 67 km
Oritate Miyagi Japan Village - 68 km
Shobudahama Miyagi Japan Village - 68 km
Wabuchi Miyagi Japan Village - 69 km
Aramachi Miyagi Japan Village - 69 km
Aratohama Miyagi Japan Village - 70 km
Maeyachi Miyagi Japan Village - 70 km
Tomarihama Miyagi Japan Village - 70 km
Sendai Miyagi Japan Major city 1 million people 81 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Matsushima 2 Civ. Paved Yes 8800 61 km
Kasuminome 5 0 77 km
Sendai SDJ 5 Civ. Paved Yes 9800 78 km
Ojojibara 70 0 95 km

Ports

Name LOCODE Country Distance
Onagawa JPONG Japan 49 km
Ishinomaki JPISM Japan 55 km
Shiogama JPSGM Japan 72 km
Soma JPSMA Japan 79 km
Kesennuma Ko Japan 87 km

Dams

Reservoir Dam Name River Year Distance
Tarumizuko Tarumizu Masudagawa 1976 85 km
Naganuma Naganuma Hazamagawa 2005 88 km
Nanatsumoriko Minamikawa Minamikawa 1987 93 km
Kejonuma Kejonuma Tajirigawa 1995 94 km
Takanokura Takanokura Mizunashigawa 1975 96 km
Yokokawa Yokokawa Otagawa 1983 96 km
Kamafusako Kamafusa Goishigawa 1970 97 km
Nanakita Nanakita Nanakitagawa 1984 98 km
Okurako Okura Okuragawa 1961 99 km
Tamanotameike Tamano Udagawa 1945 100 km

Nuclear plants

Name Country Reactors Distance
ONAGAWA JAPAN 3 42 km

More information

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