PAGER - M 4.2 - 35.3 mi SSE of Calexico, CA
Alert Version: 1Tuesday, October 13th, 2009 at 08:38:52 UTCLocation: 32.2° N, 115.3° WDepth: 23kmEvent Id: CI10480301Created: 1 hour, 35 minutes after earthquake.
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, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction.
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, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction.
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 | 0 | Strong | Light | Moderate |
| V | 11k | Moderate | V. Light | Light |
| IV | 62k | Light | none | none |
| II-III | 1,049k | Weak | none | none |
| I | 310k* | Not Felt | none | none |
*Estimated exposure only includes population within calculated shake map area
| Population Exposure Population per ~1 sq. km. from LandScan  | Selected Cities Exposed
| ||||||||||||||||||||||||||||||||||||
Shaking Intensity  |
Full City Exposure List
| MMI | City | Population |
|---|---|---|
| IV | Alberto Oviedo Mota | 8k |
| III | Delta | 6k |
| III | Guadalupe Victoria | 18k |
| III | Estacion Coahuila | 8k |
| II | Puebla | 9k |
| II | Progreso | 5k |
| II | Tecolots | 5k |
| II | Mexicali | 597k |
| II | Hermosillo | 6k |
| II | Calexico | 36k |
| I | San Luis Rio Colorado | 139k |
| I | San Luis | 22k |
| I | Heber | 3k |
| I | Gadsden | 1k |
| I | Holtville | 5k |
| I | El Centro | 38k |
| I | Somerton | 9k |
| I | Imperial | 10k |
| I | Seeley | 2k |
| I | Los Algodones | 5k |
| I | Yuma | 84k |
| I | Brawley | 22k |
| I | Westmorland | 2k |
| I | Maneadero | 18k |
| I | Fortuna Foothills | 31k |
| I | Wellton | 2k |
| I | Calipatria | 8k |
| I | Pine Valley | 2k |
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.
