PAGER - M 5.6 - SUMBAWA REGION, INDONESIA
Alert Version: 2Saturday, October 24th, 2009 at 20:54:46 UTCLocation: 9.9° S, 118.7° EDepth: 10kmEvent Id: US2009NDBACreated: 2 days, 10 hours after earthquake.
Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though some resistant structures exist. A magnitude 6.2 earthquake 371 km Northwest of this one struck Indonesia on May 30, 1979 (UTC), with estimated population exposures of 15,000 at intensity VII and 703,000 at intensity VI, resulting in an estimated 22 fatalities. On December 12, 1992 (UTC), a magnitude 7.7 earthquake 387 km Northeast of this one struck Indonesia, with estimated population exposures of 15,000 at intensity VIII and 487,000 at intensity VII, resulting in an estimated 1,740 fatalities. Recent earthquakes in this area have caused landslides that may have contributed to losses.
Overall, the population in this region resides in structures that are vulnerable to earthquake shaking, though some resistant structures exist. A magnitude 6.2 earthquake 371 km Northwest of this one struck Indonesia on May 30, 1979 (UTC), with estimated population exposures of 15,000 at intensity VII and 703,000 at intensity VI, resulting in an estimated 22 fatalities. On December 12, 1992 (UTC), a magnitude 7.7 earthquake 387 km Northeast of this one struck Indonesia, with estimated population exposures of 15,000 at intensity VIII and 487,000 at intensity VII, resulting in an estimated 1,740 fatalities. Recent earthquakes in this area have caused landslides that may have contributed to losses.
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 | 106k | Moderate | V. Light | Light |
| IV | 2,387k | Light | none | none |
| II-III | 12k* | 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
| ||||||||||||||||||||||||||||||||||||
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.
