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]
5-		Hitachi,Ibaraki	190,000	22
5-		Hitachiota,Ibaraki	56,000	16
4		Shirakawa,Fukushima	64,000	87
4		Tokai,Naka,Ibaraki	37,000	8
4		Takahagi,Ibaraki	31,000	36
4		Kasama,Ibaraki	79,000	27
4		Motegi,Haga,Tochigi	15,000	39
4		Sakuragawa,Ibaraki	46,000	46
4		Hirata,Ishikawa,Fukushima	6,900	90
4		Ichikai,Haga,Tochigi	12,000	47
4		Tamakawa,Ishikawa,Fukushima	7,200	91
4		Moka,Tochigi	83,000	52
4		Nakagawa,Nasu,Tochigi	19,000	53
4		Mito,Ibaraki	270,000	12
4		Tamura,Fukushima	40,000	115
4		Daigo,Kuji,Ibaraki	20,000	46
4		Nishigo,Nishishirakawa,Fukushima	21,000	91
4		Naka,Ibaraki	55,000	11
4		Ibaraki,Higashiibaraki,Ibaraki	34,000	20
4		Asakawa,Ishikawa,Fukushima	6,800	77
4		Hitachiomiya,Ibaraki	45,000	23
4		Haga,Haga,Tochigi	18,000	51
4		Hitachinaka,Ibaraki	160,000	5
4		Otawara,Tochigi	77,000	73
4		Kitaibaraki,Ibaraki	47,000	46
4		Izumizaki,Nishishirakawa,Fukushima	6,800	88
4		Shirosato,Higashiibaraki,Ibaraki	21,000	21
4		Iwaki,Fukushima	340,000	76
4		Ishioka,Ibaraki	80,000	36
4		Hokota,Ibaraki	50,000	27
4		Mashiko,Haga,Tochigi	24,000	45
4		Tanagura,Higashishirakawa,Fukushima	15,000	72
3		Inashiki,Ibaraki	47,000	55
3		Nikko,Tochigi	90,000	88
3		Kasumigaura,Ibaraki	43,000	42
3		Chikusei,Ibaraki	110,000	56
3		Omitama,Ibaraki	52,000	28
3		Kagamiishi,Iwase,Fukushima	13,000	97
3		Nakajima,Nishishirakawa,Fukushima	4,900	86
3		Furudono,Ishikawa,Fukushima	6,000	76
3		Katsurao,Futaba,Fukushima	1,500	123
3		Tsuchiura,Ibaraki	140,000	51
3		Joso,Ibaraki	65,000	68
3		Yuki,Ibaraki	52,000	65
3		Nasukarasuyama,Tochigi	29,000	49
3		Sukagawa,Fukushima	79,000	100
3		Shimotsuma,Ibaraki	45,000	61
3		Miyashiro,Minamisaitama,Saitama	35,000	89
3		Nasu,Nasu,Tochigi	27,000	81
3		Ishikawa,Ishikawa,Fukushima	18,000	83
3		Yamatsuri,Higashishirakawa,Fukushima	6,400	54
3		Yabuki,Nishishirakawa,Fukushima	19,000	92
3		Sakura,Tochigi	44,000	64
3		Ashikaga,Tochigi	150,000	103
3		Takanezawa,Shioya,Tochigi	31,000	60
3		Tenei,Iwase,Fukushima	6,100	100
3		Tsukuba,Ibaraki	210,000	62
3		Kanuma,Tochigi	100,000	78
3		Kasukabe,Saitama	240,000	89
3		Shimotsuke,Tochigi	59,000	67
3		Bando,Ibaraki	56,000	74
3		Ami,Inashiki,Ibaraki	50,000	53
3		Kawauchi,Futaba,Fukushima	2,800	105
3		Oyama,Tochigi	160,000	72
3		Nihommatsu,Fukushima	60,000	132
3		Koriyama,Fukushima	340,000	113
3		Tsukubamirai,Ibaraki	45,000	70
3		Namegata,Ibaraki	38,000	46
3		Chiyoda,Ora,Gumma	11,000	105
3		Goka,Sashima,Ibaraki	9,500	82
3		Kiryu,Gumma	120,000	113
3		Utsunomiya,Tochigi	510,000	66
3		Noda,Chiba	150,000	81
3		Inzai,Chiba	89,000	75
3		Shibukawa,Gumma	83,000	143
3		Kawamata,Date,Fukushima	16,000	140
3		Kuki,Saitama	150,000	91
3		Ono,Tamura,Fukushima	11,000	98
3		Ota,Gumma	220,000	110
3		Minuma,Saitama,Saitama	150,000	99
3		Koga,Ibaraki	140,000	79
3		Toride,Ibaraki	110,000	73
3		Hanyu,Saitama	56,000	97
3		Ora,Ora,Gumma	28,000	103
3		Yachiyo,Yuki,Ibaraki	23,000	68
3		Oarai,Higashiibaraki,Ibaraki	18,000	9
3		Kawachi,Inashiki,Ibaraki	10,000	65
3		Hanawa,Higashishirakawa,Fukushima	9,800	64
3		Nasushiobara,Tochigi	120,000	79
3		Miharu,Tamura,Fukushima	17,000	116
3		Aizuwakamatsu,Fukushima	130,000	135
3		Kazo,Saitama	110,000	94
3		Satte,Saitama	54,000	86
3		Kaminokawa,Kawachi,Tochigi	32,000	61
3		Sakai,Sashima,Ibaraki	26,000	79
3		Yoshimi,Hiki,Saitama	22,000	110
3		Shioya,Shioya,Tochigi	13,000	78
3		Meiwa,Ora,Gumma	11,000	97
3		Minamisanriku,Motoyoshi,Miyagi	17,000	264
3		Isesaki,Gumma	210,000	126
3		Kumagaya,Saitama	200,000	112
3		Fukaya,Saitama	140,000	120
3		Narita,Chiba	130,000	73
3		Kamisu,Ibaraki	95,000	57
3		Gyoda,Saitama	85,000	106
3		Ushiku,Ibaraki	83,000	61
3		Katori,Chiba	83,000	56
3		Ryugasaki,Ibaraki	81,000	66
3		Kashima,Ibaraki	66,000	48
3		Shiroi,Chiba	59,000	83
3		Kitakata,Fukushima	52,000	153
3		Oizumi,Ora,Gumma	40,000	108
3		Iitate,Soma,Fukushima	6,200	142
3		Samegawa,Higashishirakawa,Fukushima	4,000	71

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.

Major Historical Damaging Earthquakes in This Region

Year	Region	M	Damage
1895	Southern Ibaraki	7.2	53 collapses (43 houses and 10 depots), 6 dead.
1915	Boso Peninsula	6.0	Some landslides. 5 injured, some houses collapsed.
1921	Southern Ibaraki	7.0	Ryugasaki Earthquake,Minor damage in Chiba and Ibaraki such as damage to houses and roads.
1938	Off Ibaraki	7.0	250 houses damaged in Fukushima. 1 depot collapsed in Ibaraki. A small tsunami was observed.
1943	Aizu, Fukushima	6.2	Tajima Earthquake,Minor damage such as landslides and spalling of walls.
1949	Northern Tochigi	6.2	Imaichi Earthquake,10 dead, 290 houses collapsed, 2,994 partially destroyed, 618 non-residential houses collapsed. Many masonries were damaged. Many landslides were observed.
1987	E Off Chiba	6.7	2 dead, 161 injured in Chiba. 16 houses collapsed and over 70,000 partially destroyed. Many roads damaged.
2011	Hamadori, Fukushima	7.0	The crustal earthquake with normal faults, induced by the 2011 Off the Pacific Coast of Tohoku Earthquake. 4 dead, 10 injured (as of March 2012). Maximum Is was 6-.
2012	E Off Chiba	6.1	The crustal earthquake with normal faults, induced by the 2011 Off the Pacific Coast of Tohoku Earthquake. 1 dead, 1 injured. Maximum Is was 5+.

Reference: National Astronomical Observatory of Japan, "Rika Nenpyo Web Edition", MARUZEN *partially extracted

5- or greater	5+ or greater Not Available
6- or greater Not Available	6+ or greater Not Available

Updated: 2016-07-27 23:53:50 (UTC+9) Ver.6

I_s Distribution Maximum Observed I_s:5-

Estimated I_s for Major Cities

I_s Exposed-Population Estimates of Each City

Major Historical Damaging Earthquakes in This Region

Seismic Hazard Information of J-SHIS

Show All Data
Show All Data	5- or greater	5+ or greater	6- or greater	6+ or greater
Whole of Japan	20,000
Fukushima Prefecture	2,000
Shirakawa,Fukushima	< 1,000
Sukagawa,Fukushima	< 1,000
Kagamiishi,Iwase,Fukushima	< 1,000
Nakajima,Nishishirakawa,Fukushima	< 1,000
Yabuki,Nishishirakawa,Fukushima	< 1,000
Tamakawa,Ishikawa,Fukushima	1,000
Ibaraki Prefecture	20,000
Hitachi,Ibaraki	10,000
Hitachiota,Ibaraki	10,000
Takahagi,Ibaraki	< 1,000
Kasama,Ibaraki	2,000
Naka,Ibaraki	< 1,000
Tokai,Naka,Ibaraki	< 1,000

Updated: 2016-07-27 23:53:50 (UTC+9) Ver.6

Is Distribution Maximum Observed Is:5-

Estimated Is for Major Cities

Is Exposed-Population Estimates of Each City

Major Historical Damaging Earthquakes in This Region

Seismic Hazard Information of J-SHIS

I_s Distribution Maximum Observed I_s:5-

Estimated I_s for Major Cities

I_s Exposed-Population Estimates of Each City