M 6 - NEVADA

Thursday, February 21, 2008 at 14:16:05 UTC
Location: 41.1°N 114.8°W Depth: 10km

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	2k	Strong	Light	Moderate
V	2k	Moderate	V. Light	Light
IV	1,155k*	Light	None	None
II-III	676k*	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
VI	Wells	1k
IV	Wendover	1k
IV	West Wendover	4k
IV	Spring Creek	13k
IV	Carlin	2k
IV	Kimberly	2k
IV	West Valley City	113k
IV	West Jordan	101k
IV	Sandy City	85k
III	Salt Lake City	178k
III	Ogden	78k

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.

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	2k	Strong	Light	Moderate
V	2k	Moderate	V. Light	Light
IV	1,155k*	Light	None	None
II-III	676k*	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
VI	Wells	1k
IV	Wendover	1k
IV	West Wendover	4k
IV	Spring Creek	13k
IV	Carlin	2k
IV	Kimberly	2k
IV	Filer	1k
IV	Twin Falls	38k
IV	Burley	9k
IV	Owyhee	1k
IV	Buhl	4k
IV	Grantsville	7k
IV	Jerome	8k
IV	Heyburn	2k
IV	Rupert	5k
IV	Wendell	2k
IV	Taylorsville	58k
IV	Syracuse	18k
IV	West Valley City	113k
IV	American Falls	3k
IV	West Jordan	101k
IV	Gooding	3k
IV	Kearns	35k
IV	Shoshone	1k
IV	Battle Mountain	3k
IV	Clearfield	28k
IV	Midvale	27k
IV	Murray	54k
IV	West Point	6k
IV	Centerfield	1k
IV	Saratoga Springs	3k
IV	South Jordan	29k
IV	Plain City	4k
IV	Marriott-Slaterville	1k
IV	West Haven	5k
IV	McGill	1k
IV	Hooper	3k
IV	Sandy City	85k
IV	Dugway	2k
IV	Clinton	17k
IV	Millcreek	30k
IV	Riverton	31k
IV	Sunset	4k
IV	Ely	3k
IV	South Salt Lake	21k
IV	Mountain Home	11k
IV	Glenns Ferry	1k
III	Magna	24k
III	Wellsville	2k
III	Roy	36k
III	Bluffdale	6k
III	Tremonton	6k
III	Herriman	6k
III	Garland	1k
III	White City	6k
III	Farr West	4k
III	North Salt Lake	9k
III	Layton	62k
III	Mendon	1k
III	Benson	1k
III	Riverdale	7k
III	Lehi	26k
III	Erda	3k
III	Salt Lake City	178k
III	Tooele	29k
III	Aberdeen	1k
III	Preston	4k
III	Harrisville	5k
III	Kaysville	22k
III	Stansbury park	3k
III	West Bountiful	4k
III	Oquirrh	11k
III	Woods Cross	8k
III	Ogden	78k
III	Delta	3k
III	Washington Terrace	8k
III	South Ogden	15k
III	Lewiston	1k
III	Little Cottonwood Creek Valley	8k
III	Holladay	29k
III	Hyrum	6k
III	Willard	1k
III	Bountiful	41k
III	Pleasant View	5k
III	Perry	3k
III	Willard	1k
III	North Ogden	16k
III	Malad City	2k
III	Fruit Heights	4k
III	Uintah	1k
III	Farmington	14k
III	South Weber	6k
III	Honeyville	1k
III	Brigham City	17k
III	American Fork	23k
III	Centerville	14k
III	Draper	35k
III	Smithfield	8k
III	Nibley	2k
III	Canyon Rim	10k
III	Eagle Mountain	8k
III	Cottonwood Heights	28k
III	Millville	1k
III	East Millcreek	20k
III	Richmond	2k
III	Hyde Park	3k
III	Granite	2k
III	Elko	15k
III	Fort Hall	3k
III	Logan	44k
III	Providence	5k
III	River Heights	1k
III	North Logan	7k
III	Blackfoot	10k
III	Mount Olympus	6k
III	Alpine	8k
III	Highland	8k
III	Mona	1k
III	Pocatello	50k
III	Santaquin	6k
III	Nephi	5k
III	Chubbuck	10k
III	Gunnison	2k
III	Centerfield	1k
III	Fillmore	2k
III	Salina	2k

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
Max MMI	VI
Date-Time	Thursday, February 21, 2008 at 14:16:05 UTC
Location	41.076°N, 114.771°W
Depth	10.0 km (6.2 miles)
Event ID	US2008NSA9
Version	3