M 5.1 in Japan from 18 Apr 2011 13:03 UTC to 13:03

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.

Updated: this report is based on episode 1.

Earthquake Magnitude: 5.1M
Depth: Km
Lat/Lon: 40.6953 , 140.345
Event Date: 18 Apr 2011 13:03 UTC
18 Apr 2011 22:03 Local
Exposed Population:
1660000 people within 100km
Source: NEIC usc0002tyd
Inserted at: 18 Apr 2011 13:42 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc0002tyd Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
107386 0.5 18 Apr 2011 13:03 5.1M, 25.7km N/A 1.7 million (in 100km) 00:38 NEIC
107395 0.5 18 Apr 2011 13:03 5.1M, 14.7km N/A 1.8 million (in 100km) 03:22 NEIC
107396 0.5 18 Apr 2011 13:03 5M, 78.5km N/A 2.7 million (in 100km) 04:55 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 Tozurazawa, Onizawa, Omori, Otomo, Nagadai, Miwa, Nakabessho, Tokoshinai, Nijoka, Takasugi, and Mortake.

Radius Population
100 km 1.6 million people
75 km 1.1 million people
50 km 800000 people
20 km 330000 people
10 km 34000 people
5 km 1800 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Tohoku Japan 10 million people

Affected populated places

Name Region Province Country City class Population Distance
Tozurazawa Aomori Japan Village - 4 km
Onizawa Aomori Japan Village - 4 km
Omori Aomori Japan Village - 4 km
Otomo Aomori Japan Village - 6 km
Nagadai Aomori Japan Village - 6 km
Miwa Aomori Japan Village - 7 km
Nakabessho Aomori Japan Village - 7 km
Tokoshinai Aomori Japan Village - 7 km
Nijoka Aomori Japan Village - 8 km
Takasugi Aomori Japan Village - 8 km
Tateishi Aomori Japan Village - 8 km
Shobukawa Aomori Japan Village - 8 km
Hyakuzawa Aomori Japan Village - 8 km
Kizutsu Aomori Japan Village - 9 km
Myodozaki Aomori Japan Village - 9 km
Karekitai Aomori Japan Village - 10 km
Tokiwano Aomori Japan Village - 10 km
Ipponsugi Aomori Japan Village - 10 km
Onohata Aomori Japan Village - 10 km
Tsuruda Aomori Japan Village - 10 km
Itavanagi Aomori Japan Village - 10 km
Kurumidate Aomori Japan Village - 10 km
Nonaka Aomori Japan Village - 10 km
Takibuchi Aomori Japan Village - 10 km
Godai Aomori Japan Village - 11 km
Yoshita Aomori Japan Village - 11 km
Hama-Yokosawa Aomori Japan Village - 11 km
Maisudai Aomori Japan Village - 11 km
Nakazaki Aomori Japan Village - 11 km
Fukuhara Aomori Japan Village - 11 km
Kamishikizawa Aomori Japan Village - 11 km
Odate Aomori Japan Village - 11 km
Fukami Aomori Japan Village - 11 km
Omaki Aomori Japan Village - 11 km
Kuwanokida Aomori Japan Village - 11 km
Sakuraba Aomori Japan Village - 12 km
Hirooka Aomori Japan Village - 12 km
Naka Aomori Japan Village - 12 km
Kuniyoshi Aomori Japan Village - 12 km
Nyoraise Aomori Japan Village - 12 km
Nakahata Aomori Japan Village - 12 km
Shibata Aomori Japan Village - 12 km
Matsuchi Aomori Japan Village - 13 km
Kizukuri Aomori Japan Village 19000 people 13 km
Kuromori Aomori Japan Village - 13 km
Kawajiri Aomori Japan Village - 13 km
Koshimizu Aomori Japan Village - 13 km
Yoshimi Aomori Japan Village - 13 km
Seinofukuro Aomori Japan Village - 13 km
Yokoyachi Aomori Japan Village - 13 km
Maido Aomori Japan Village - 13 km
Yokosawa Aomori Japan Village - 13 km
Gorindai Aomori Japan Village - 13 km
Akuto Aomori Japan Village - 13 km
Fujisaki Aomori Japan Village - 13 km
Tamamizu Aomori Japan Village - 14 km
Natsubotai Aomori Japan Village - 14 km
Oki Aomori Japan Village - 14 km
Takii Aomori Japan Village - 14 km
Ajigasawa Aomori Japan City - 15 km
Sawata Aomori Japan Village - 15 km
Kami-Jokaibashi Aomori Japan Village - 15 km
Hosogatai Aomori Japan Village - 15 km
Tanesato Aomori Japan Village - 15 km
Soma Aomori Japan Village - 15 km
Sakaki Aomori Japan Village - 15 km
Naijoshi Aomori Japan Village - 15 km
Harako Aomori Japan Village - 15 km
Goshogahara Aomori Japan Village - 15 km
Hiderita Aomori Japan Village - 15 km
Hirosaki Aomori Japan City 170000 people 16 km
Maruyama Aomori Japan Village - 16 km
Oneko Aomori Japan Village - 16 km
Hitotsumori Aomori Japan Village - 16 km
Hayashi Aomori Japan Village - 16 km
Hanokizawa Aomori Japan Village - 16 km
Koya Aomori Japan Village - 17 km
Omotemura Aomori Japan Village - 17 km
Mizuki Aomori Japan Village - 17 km
Ojikari Aomori Japan Village - 17 km
Tonosaki Aomori Japan Village - 17 km
Kanedate Aomori Japan Village - 17 km
Tatamitai Aomori Japan Village - 17 km
Nashinoki Aomori Japan Village - 17 km
Akaishimachi Aomori Japan Village - 17 km
Nozato Aomori Japan Village - 18 km
Ainai Aomori Japan Village - 18 km
Ishidate Aomori Japan Village - 18 km
Toguge Aomori Japan Village - 18 km
Haragatai Aomori Japan Village - 18 km
Matsunoki Aomori Japan Village - 18 km
Kawabe Aomori Japan Village - 18 km
Hadatsu Aomori Japan Village - 19 km
Kudoji Aomori Japan Village - 19 km
Yahatazaki Aomori Japan Village - 19 km
Nisato Aomori Japan Village - 19 km
Imoritai Aomori Japan Village - 19 km
Shimo-Mogawa Aomori Japan Village - 19 km
Niyama Aomori Japan Village - 19 km
Futatsuya Aomori Japan Village - 19 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
Aomori AOJ 199 Civ. Paved Yes 8200 30 km
Odate Noshiro ONJ 89 Civ. Paved Yes 6500 56 km
Misawa Naf MSJ 36 Mil. Paved Yes 10000 87 km
Hachinohe HHE 46 Mil. Paved Yes 7300 96 km

Ports

Name LOCODE Country Distance
Aomori JPAOJ Japan 39 km
Noshiro JPNSR Japan 60 km
Fukushima Japan 85 km
Oga Japan 87 km
Ominato JPOMT Japan 96 km
Funakawa JPFNK Japan 100 km

Dams

Reservoir Dam Name River Year Distance
Shinkodoroku Shinkodoroku Yamadagawa 1967 8 km
Miyamako Meya Iwakigawa 1959 19 km
Fudoko Iizume Iizumegawa 1972 22 km
Odagawa Odagawa Odagawa 1975 27 km
Namioka Namioka Kareizawagawa 1982 28 km
Hayaseno Hayaseno Nijigaigawa 1984 30 km
Nijinoko Asaseishigawa Asaseishigawa 1988 31 km
Chokeiko Hayakuchi Hayakuchigawa 1976 32 km
Fujinoko Oana Nishonaigawa 1933 33 km
Shimoyuheiseiko Shimoyu Tsutsumigawa 1988 37 km
Subariko Subari Kasugegawa 1970 41 km
Shakaike Shakaike Midaregawa 1945 46 km
Tanosawatameike Tanosawatameike Shimizugawa 1942 59 km
Tenma Tenma Tsubokawa 1968 62 km
Hanekawa Hanekawa Itonagaregawa 1967 73 km
Taiheiko Moriyoshi Komatagawa 1953 75 km
Koaniko Haginari Koanigawa 1966 86 km
Hosenko Tamagawa Tamagawa 1990 98 km

More information

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