J-RISQ Report

Estimated I_s for Major Cities

Max. Obs. I_s	Histogram of Estimated I_s 1 2 3 4 5- 5+ 6- 6+ 7	Municipality Show All Data	Nighttime Population	Distance [km]
4		Samani,Samani,Hokkaido	4,500	36
4		Hiro,Hiro,Hokkaido	7,000	63
4		Erimo,Horoizumi,Hokkaido	4,900	31
4		Urakawa,Urakawa,Hokkaido	13,000	42
4		Urahoro,Tokachi,Hokkaido	4,900	128
4		Hakodate,Hokkaido	270,000	180
4		Makubetsu,Nakagawa,Hokkaido	27,000	128
4		Taiki,Hiro,Hokkaido	5,700	83
3		Kushiro,Hokkaido	170,000	179
3		Toyokoro,Nakagawa,Hokkaido	3,200	122
3		Shinhidaka,Hidaka,Hokkaido	23,000	74
3		Higashidori,Shimokita,Aomori	6,600	143
3		Niikappu,Niikappu,Hokkaido	5,600	79
3		Noheji,Kamikita,Aomori	13,000	180
3		Shiranuka,Shiranuka,Hokkaido	8,100	160
3		Hachinohe,Aomori	230,000	185
3		Kushiro,Kushiro,Hokkaido	20,000	184
3		Morioka,Iwate	300,000	275
3		Memuro,Kasai,Hokkaido	19,000	124
3		Abira,Yufutsu,Hokkaido	8,200	139
3		Mutsu,Aomori	59,000	153
3		Ebetsu,Hokkaido	120,000	183
3		Mukawa,Yufutsu,Hokkaido	8,600	118
3		Higashi,Sapporo,Hokkaido	260,000	190
3		Hashikami,Sannohe,Aomori	14,000	184
3		Namporo,Sorachi,Hokkaido	7,900	174
3		Sarabetsu,Kasai,Hokkaido	3,200	97
3		Muroran,Hokkaido	88,000	169
3		Ikeda,Nakagawa,Hokkaido	6,900	133
3		Obihiro,Hokkaido	170,000	127
3		Shichinohe,Kamikita,Aomori	16,000	187
3		Atsuma,Yufutsu,Hokkaido	4,800	133
3		Kitahiroshima,Hokkaido	60,000	171
3		Toyora,Abuta,Hokkaido	4,300	200
3		Biratori,Saru,Hokkaido	5,300	108
3		Kita,Sapporo,Hokkaido	290,000	192
3		Nambu,Sannohe,Aomori	18,000	195
3		Tohoku,Kamikita,Aomori	18,000	181
3		Shiraoi,Shiraoi,Hokkaido	18,000	152
3		Shinshinotsu,Ishikari,Hokkaido	3,300	189
3		Kuriyama,Yubari,Hokkaido	12,000	167
3		Shikaoi,Kato,Hokkaido	5,500	144

The histogram shows frequency distribution of estimated I_s 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.

Show All Data
Show All Data	5- or greater	5+ or greater	6- or greater	6+ or greater
Whole of Japan	2,000
Hokkaido Prefecture	2,000
Urakawa,Urakawa,Hokkaido	1,000
Samani,Samani,Hokkaido	1,000
Erimo,Horoizumi,Hokkaido	< 1,000
Hiro,Hiro,Hokkaido	< 1,000
Urahoro,Tokachi,Hokkaido	< 1,000

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
1856	Hidaka, Iburi, Watarishima, Tsugaru, Nanbu	7.5	Ansei Hachinohe-oki Earthquake,Tsunamis struck Sanriku and the southern coast of Hokkaido. 93 outflows, 106 houses collapsed, 26 drowned in Nanbu Domain. 3 dead in Hachinohe Domain.
1915	Off Tokachi	7.0	1 dead, 1 house collapsed.
1945	E Off Aomori	7.1	2 house collapsed, 2 dead in Aomori. The total amplitude of the tsunami was 35 cm.
1952	Off Kushiro	8.2	Tokachi-oki Earthquake,Tsunami with heights of 3m in Hokkaido and 1-2 m on the Sanriku coast. 28 dead, 5 missing, 815 houses collapsed, 1,324 partially destroyed, 91 outflows.
1962	Off Tokachi	7.1	2 building collapses and some minor damage.
1968	E Off Aomori	7.9	Tokachi-oki Earthquake,52 dead, 330 injured, 673 houses collapsed, 3,004 partially destroyed. Observed tsunami heights were 3-5 m on the Sanriku Coast and 3 m on Cape Erimo.
1970	Southern Tokachi	6.7	32 injured, 2 houses collapsed, 7 partially destroyed, 139 partially damaged.
1982	Off Urakawa	7.1	Uraga-oki Earthquake,167 injured, 9 buildings collapsed, 16 partially destroyed, 174 partially damaged, 45 railways damaged. A small tsunami was observed.
2003	Off Kushiro	8.0	Tokachi-oki Earthquake,1 dead, 1 missing, 849 injured, 116 houses collapsed, 368 partially destroyed. The maximum S was 6- (9 cities in Hokkaido). A tsunami whose maximum height was 4m hit Hokkaido and the Pacific coast of Honshu.