2011-03-11 14:46:18 (UTC+9), OFF SANRIKU, 24km Depth, M 9.0 by JMA

Is Distribution Maximum Observed Is:7

Seismic Intensity (Is) distribution is estimated from the observed data (circles) of NIED K-NET, KiK-net, JMA, and local governments that had been collected by 2016/11.

Estimated Is for Major Cities

Max. Obs. Is Histogram
of Estimated Is
1
2
3
4
5-
5+
6-
6+
7
Municipality Show All Data Daytime Population Distance
[km]
7
Kurihara,Miyagi 77,000 174
7
Haga,Haga,Tochigi 30,000 302
6+
Hitachi,Ibaraki 210,000 257
6+
Ishinomaki,Miyagi 170,000 140
6+
Miyagino,Sendai,Miyagi 200,000 171
6+
Osaki,Miyagi 130,000 173
6+
Tome,Miyagi 86,000 159
6+
Nikko,Tochigi 87,000 318
6+
Otawara,Tochigi 79,000 285
6+
Kasama,Ibaraki 71,000 300
6+
Natori,Miyagi 67,000 172
6+
Shirakawa,Fukushima 64,000 257
6+
Utsunomiya,Tochigi 510,000 314
6+
Chikusei,Ibaraki 100,000 323
6+
Sukagawa,Fukushima 73,000 236
6+
Shiogama,Miyagi 51,000 162
6-
Koriyama,Fukushima 350,000 233
6-
Tsukuba,Ibaraki 210,000 337
6-
Kitakami,Iwate 100,000 200
6-
Iwaki,Fukushima 340,000 209
The histogram shows frequency distribution of estimated Is derived from interpolation of the observation with 250-m mesh. The daytime and nighttime correspond to 9:00-18:59 and 19:00-8:59, respectively. The distance is measured from the epicenter to the center of the municipality.

Is Exposed-Population Estimates of Each City

5- or greater
5- or greater
5+ or greater
5+ or greater
6- or greater
6- or greater
6+ or greater
6+ or greater
color scale
Show All Data
5- or
greater
5+ or
greater
6- or
greater
6+ or
greater
Whole of Japan 50,000,000 20,000,000 5,000,000 1,000,000
Iwate Prefecture 1,000,000 1,000,000 200,000 20,000
Miyagi Prefecture 2,000,000 2,000,000 2,000,000 500,000
  Aoba,Sendai,Miyagi 500,000 500,000 200,000
  Miyagino,Sendai,Miyagi 200,000 200,000 200,000 100,000
  Wakabayashi,Sendai,Miyagi 200,000 200,000 200,000 50,000
  Taihaku,Sendai,Miyagi 200,000 200,000 100,000 50,000
  Izumi,Sendai,Miyagi 200,000 200,000 200,000 20,000
  Ishinomaki,Miyagi 200,000 200,000 100,000 20,000
  Kurihara,Miyagi 100,000 100,000 50,000 50,000
  Osaki,Miyagi 100,000 100,000 100,000 100,000
Fukushima Prefecture 2,000,000 2,000,000 1,000,000 200,000
  Koriyama,Fukushima 500,000 500,000 200,000 20,000
  Iwaki,Fukushima 500,000 500,000 200,000 50,000
Ibaraki Prefecture 2,000,000 2,000,000 2,000,000 200,000
  Mito,Ibaraki 200,000 200,000 200,000 20,000
  Hitachi,Ibaraki 200,000 200,000 200,000 200,000
Tochigi Prefecture 2,000,000 1,000,000 500,000 100,000
Saitama Prefecture 5,000,000 2,000,000 < 1,000
Chiba Prefecture 5,000,000 2,000,000 50,000
Tokyo Prefecture 10,000,000 2,000,000 20,000
Kanagawa Prefecture 5,000,000 1,000,000
The summation of the exposed population for each city does not necessarily equal to that of the prefecture or whole of Japan.

Major Historical Damaging Earthquakes in This Region

Year Region M Damage
1897 Off Miyagi 7.7 3m tsunami in Sakari; 1.2 m tsunami in Kamaishi.
1898 Off Miyagi 7.2 1 depot collapsed in Hanamaki. A small tsunami was observed.
1936 Off Miyagi 7.4 Miyagiken-oki Earthquake,3 non-residential houses collapsed. A small tsunami was observed.
1978 Off Miyagi 7.4 Miyagiken-oki Earthquake,28 dead, 1,325 injured, 1,183 houses collapsed, 5,574 partially destroyed, 888 roads damaged, 529 landslides. 18 people were crushed to death by collapsed walls.
2005 Off Miyagi 7.2 100 injured, 1 house collapsed, 0 partially collapsed. Maximum JMA seismic intensity was 6-. A tsunami was observed along the Pacific coast of Tohoku (with a maximum height of 13 cm).
2011 Off Sanriku 9.0 2011 off the Pacific coast of Tohoku Earthquake,Mega-thrust earthquake in the subduction zone along the Japan trench from off the middle of Sanriku to off of Ibaraki. 16,278 dead, 2,994 missing, 6,179 injured, 129,198 houses collapsed, 254,238 partially destroyed (as of March 2012; including some damage by aftershocks and induced earthquakes). 90% of fatalities were drownings. Most of the damage was caused by a large tsunami (height of about 40 m, according to field investigation). Maximum Is was 7. The damage by ground motion was relatively less significant.
2011 Off Miyagi 7.1 The intraslab earthquake with the reverse fault of the Pacific plate, induced by the 2011 Off the Pacific Coast of Tohoku Earthquake in its epicentral area. 4 dead, 296 injured, over 36 houses collapsed, over 27 partially collapsed. Maximum Is was 6-upper.
Reference: National Astronomical Observatory of Japan, "Rika Nenpyo Web Edition", MARUZEN *partially extracted

Seismic Hazard Information of J-SHIS

J-SHIS is a Web service by NIED, to help prevent and prepare for earthquake disaster by providing a public portal for seismic hazard information across Japan.

Is Distribution of 2% Probability of Exceedance in 50 Years
Is Distribution of Return Period of 50,000-year