M 6.8 - NEAR THE EAST COAST OF HONSHU, JAPAN

Wednesday, May 7, 2008 at 16:45:19 UTC
Location: 36.1°N 141.5°E Depth: 37km

Summary

Estimated Population Exposed to Earthquake Shaking

Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Potential Structure Damage
Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Resistant	Vulnerable
X	0	Extreme	V. Heavy	V. Heavy
IX	0	Violent	Heavy	V. Heavy
VIII	0	Severe	Moderate/Heavy	Heavy
VII	0	Very Strong	Moderate	Moderate/Heavy
VI	24k	Strong	Light	Moderate
V	3,656k	Moderate	V. Light	Light
IV	38,774k*	Light	None	None
II-III	6,311k*	Weak	None	None
I	--*	Not Felt	None	None

*Estimated exposure only includes population within the map area.

Population Exposure

Population per ˜1 square km from Landscan 2005

Selected City Exposure

MMI	City	Population
V	Oarai	19k
V	Hasaki	39k
V	Kashima	65k
V	Asahi	41k
V	Omigawa	25k
V	Itako	25k
IV	Tokyo	8336k
IV	Yono	1077k
IV	Kawasaki	1306k
IV	Yokohama	3574k
III	Sendai	1037k

Shaking Intensity

MMI

Users should consider the preliminary nature of this information and check for updates as additional data becomes available. Population exposure estimates are NOT a direct estimate of earthquake damage; comparable shaking will result in significantly lower losses in regions with well built structures than in regions with vulnerable structures. Overall, structures in this region are a mix of vulnerable and resistant construction. A magnitude 6.9 earthquake struck the Kobe, Japan region on January 16, 1995 (UTC), with estimated population exposures of 1.1 million at intensity IX or greater and 2.7 million at intensity VIII, resulting in 6,432 deaths. Recent earthquakes in this area have also triggered landslide and liquefaction hazards that have contributed to losses.

PAGER results are generally available on the Internet within 30 minutes of the earthquake's occurrence. However, information on the extent of shaking will be uncertain in the minutes and hours following an earthquake and typically improves as additional sensor data and reported intensities are acquired and incorporated into models of the earthquake's source. Users of PAGER exposure estimates should account for uncertainty and always seek the most current PAGER release for any earthquake.

Maps

[Population | Shakemap]

Map of MMI contours plotted over population per ˜1 square km (see gray scale bar on top of map). The regions of integer MMI values are separated by the thick contour lines and labeled with Roman numerals. The total population exposure to a given MMI value is obtained by summing the population between the thick contour lines. This total is shown in population exposure table.

Map of shaking intensity. This map shows the estimated MMI as a continuous color scale. The ground shaking estimates can be obtained from http://earthquake.usgs.gov/shakemap/.

Exposure

Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Potential Structure Damage
Est. Modified Mercalli Intensity	Est. Population Exposure (k = x1000)	Perceived Shaking	Resistant	Vulnerable
X	0	Extreme	V. Heavy	V. Heavy
IX	0	Violent	Heavy	V. Heavy
VIII	0	Severe	Moderate/Heavy	Heavy
VII	0	Very Strong	Moderate	Moderate/Heavy
VI	24k	Strong	Light	Moderate
V	3,656k	Moderate	V. Light	Light
IV	38,774k*	Light	None	None
II-III	6,311k*	Weak	None	None
I	--*	Not Felt	None	None

*Estimated exposure only includes population within the map area.

Table showing population exposed to different estimated Modified Mercalli Intensity (MMI) levels and the possible damage at different intensity levels for resistant and vulnerable structures. MMI describes the severity of an earthquake in terms of its effect on humans and structures and is a rough measure of the amount of shaking at a given location. Unlike earthquake magnitude, intensity varies with distance from the fault, and is influenced by the depth of the earthquake and the types of soils in the shaken region. Population outside the map bounds are not included in the totals.

Cities

MMI	City	Population
V	Oarai	19k
V	Hasaki	39k
V	Kashima	65k
V	Asahi	41k
V	Omigawa	25k
V	Itako	25k
V	Funaishikawa	35k
V	Katsuta	155k
V	Sawara	47k
V	Mito	246k
V	Takahagi	33k
V	Okunoya	34k
V	Yokaichiba	32k
V	Kitaibaraki	50k
V	Hitachi	186k
V	Omiya	27k
V	Ishioka	52k
V	Edosaki	20k
V	Tomobe	37k
V	Iwaki	357k
V	Naruto	25k
V	Tsukuba	175k
V	Makabe	19k
V	Ami	48k
V	Naka	46k
V	Yachimata	83k
V	Ryugasaki	85k
V	Togane	66k
V	Kasama	29k
V	Shisui	19k
V	Sakura	182k
V	Ushiku	80k
V	Oami	53k
V	Fujishiro	33k
IV	Chiba	919k
IV	Mashiko	26k
IV	Yotsukaido	86k
IV	Karasuyama	18k
IV	Toride	80k
IV	Motegi	19k
IV	Funabashi	560k
IV	Daigo	22k
IV	Mobara	97k
IV	Shiroi	55k
IV	Iwase	21k
IV	Narashino	156k
IV	Nagareyama	156k
IV	Shimodate	63k
IV	Mitsukaido	41k
IV	Moriya	56k
IV	Kashiwa	340k
IV	Ishige	24k
IV	Abiko	131k
IV	Mooka	65k
IV	Urayasu	143k
IV	Matsudo	470k
IV	Ichihara	283k
IV	Narita	100k
IV	Iwai	42k
IV	Ohara	20k
IV	Kaminokawa	30k
IV	Ichikawa	458k
IV	Yuki	51k
IV	Noda	121k
IV	Otawara	58k
IV	Ujiie	30k
IV	Yoshikawa	60k
IV	Ishikawa	18k
IV	Sakai	26k
IV	Oyama	159k
IV	Mibu	39k
IV	Katsuura	22k
IV	Kisarazu	122k
IV	Koshigaya	317k
IV	Soka	231k
IV	Kasukabe	206k
IV	Namie	21k
IV	Sukagawa	68k
IV	Sugito	49k
IV	Utsunomiya	449k
IV	Koga	58k
IV	Satte	55k
IV	Kurihashi	27k
IV	Tochigi	82k
IV	Hatogaya	53k
IV	Tokyo	8336k
IV	Iwatsuki	108k
IV	Kawaguchi	468k
IV	Kuki	73k
IV	Shiraoka	50k
IV	Warabi	69k
IV	Toda	118k
IV	Hasuda	65k
IV	Yaita	36k
IV	Fujioka	18k
IV	Zushi	60k
IV	Hayama	31k
IV	Koriyama	340k
IV	Yono	1077k
IV	Kazo	71k
IV	Kimitsu	92k
IV	Shobu	22k
IV	Futtsu	51k
IV	Kisai	20k
IV	Nerima	686k
IV	Kuroiso	61k
IV	Ageo	219k
IV	Funehiki	23k
IV	Sano	82k
IV	Wako	77k
IV	Okegawa	75k
IV	Asaka	128k
IV	Kamakura	166k
IV	Shiki	65k
IV	Hanyu	58k
IV	Tatebayashi	81k
IV	Konosu	88k
IV	Kawaguchi	29k
IV	Motomiya	22k
IV	Kanuma	94k
IV	Kawasaki	1306k
IV	Oi	50k
IV	Kamifukuoka	52k
IV	Kawagoe	337k
IV	Tanuma	28k
IV	Fukiage	28k
IV	Musashino	137k
IV	Miharu	19k
IV	Gyoda	86k
IV	Komae	77k
IV	Tanashi	82k
IV	Imaichi	64k
IV	Tokorozawa	339k
IV	Nihommatsu	36k
IV	Yokohama	3574k
IV	Kami-renjaku	178k
IV	Menuma	27k
IV	Kodaira	187k
IV	Kumagaya	155k
IV	Chofu	212k
IV	Tateyama	50k
IV	Miura	51k
IV	Tachikawa	173k
IV	Sayama	160k
IV	Hino	171k
IV	Kunitachi	78k
IV	Machida	399k
IV	Kokubunji	118k
IV	Kiryu	110k
IV	Ota	152k
IV	Minami-rinkan	224k
IV	Koganei	115k
IV	Ashikaga	159k
IV	Nikko	16k
IV	Yokosuka	428k
IV	Fukaya	106k
IV	Fujisawa	394k
IV	Sakado	96k
IV	Sakai	31k
IV	Fuchu	240k
IV	Fussa	62k
IV	Hobara	24k
IV	Hachioji	579k
IV	Hanno	86k
IV	Omama	21k
IV	Isesaki	130k
IV	Honjo	61k
IV	Fukushima	294k
IV	Atsugi	229k
IV	Zama	134k
IV	Chigasaki	231k
IV	Morohongo	39k
IV	Tamamura	42k
IV	Ninomiya	31k
IV	Watari	36k
IV	Kakuda	33k
IV	Ogawa	37k
IV	Kodama	21k
IV	Fujioka	63k
IV	Yanagawa	20k
IV	Inawashiro	17k
IV	Oiso	32k
IV	Sagamihara	648k
IV	Marumori	16k
IV	Isehara	103k
IV	Maebashi	282k
IV	Yorii	38k
IV	Ome	149k
IV	Itsukaichi	24k
IV	Hiratsuka	259k
IV	Hadano	174k
IV	Iwanuma	42k
IV	Shiroishi	39k
IV	Kitakata	37k
IV	Yonezawa	94k
III	Chichibu	58k
III	Okawara	23k
III	Uenohara	27k
III	Ishinomaki	117k
III	Takasaki	240k
III	Numata	45k
III	Kaneko	37k
III	Numazu	204k
III	Shibukawa	48k
III	Sendai	1037k
III	Yoshii	25k
III	Shiogama	59k
III	Mitsuke	43k
III	Takahata	26k
III	Annaka	48k
III	Tomioka	49k
III	Yamoto	32k
III	Rifu	35k
III	Odawara	203k
III	Yamagata	254k
III	Otsuki	31k
III	Kogota	19k
III	Nagai	31k
III	Tomiya	42k
III	Nakanojo	17k
III	Kofu	190k
III	Tendo	65k
III	Kaminoyama	35k
III	Mishima	113k
III	Shirone	41k
III	Yugawara	27k
III	Sagae	43k
III	Gotemba	83k
III	Niigata	505k
III	Atami	40k
III	Suibara	20k
III	Enzan	25k
III	Muikamachi	29k
III	Ito	71k
III	Sanjo	82k
III	Shiozawa	20k
III	Fuji	240k
III	Nagaoka	195k
III	Isawa	29k
III	Shibata	80k
III	Kamo	32k
III	Ojiya	40k
III	Niitsu	65k
III	Tsubame	44k
III	Tochio	23k
III	Gosen	37k
III	Wakuya	18k
III	Kameda	32k
III	Tokamachi	41k
III	Muramatsu	19k
III	Higashine	45k
III	Maki	29k
III	Fujinomiya	121k
III	Shimoda	26k
III	Murakami	31k
III	Yoshida	25k

Table of MMI estimates and populations for settlements falling within the map boundaries. The settlement name, location, and population are obtained from the freely-available GeoNames geographical database.

Downloads

Details

Magnitude	6.8
Max MMI	VI
Date-Time	Wednesday, May 7, 2008 at 16:45:19 UTC
Location	36.141°N, 141.540°E
Depth	36.6 km (22.7 miles)
Event ID	US2008RTBU
Version	3

Additional Information