PAGER - M 5.5 - NORTHERN QINGHAI, CHINA
Alert Version: 1Wednesday, November 4th, 2009 at 21:56:10 UTCLocation: 37.7° N, 95.8° EDepth: 10kmEvent Id: US2009NPB3Created: 22 minutes, 2 seconds after earthquake.
Overall, the population in this region resides in structures that are highly vulnerable to earthquake shaking, though some resistant structures exist. A magnitude 5.5 earthquake 270 km Northeast of this one struck China on December 14, 2002 (UTC), with estimated population exposures of 96,000 at intensity VI and 276,000 at intensity V, resulting in an estimated 2 fatalities.
Overall, the population in this region resides in structures that are highly vulnerable to earthquake shaking, though some resistant structures exist. A magnitude 5.5 earthquake 270 km Northeast of this one struck China on December 14, 2002 (UTC), with estimated population exposures of 96,000 at intensity VI and 276,000 at intensity V, resulting in an estimated 2 fatalities.
Exposure Summary
Estimated Population Exposed to Earthquake Shaking
| Est. Modified Mercalli Intensity | Est. Population Exposure | Perceived Shaking | Potential Structure Damage | |
|---|---|---|---|---|
| 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 | 1k | Strong | Light | Moderate |
| V | 15k | Moderate | V. Light | Light |
| IV | 232k | Light | none | none |
| II-III | --* | Weak | none | none |
| I | --* | Not Felt | none | none |
*Estimated exposure only includes population within calculated shake map area
| Population Exposure Population per ~1 sq. km. from LandScan  | Cities Exposed
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Shaking Intensity  | |||||||||||||||||||||||||||||||||||||
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 and 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 estimates should account for uncertainty and always seek the most current PAGER release for any earthquake.
