PAGER - M 6.4 - NEAR THE EAST COAST OF HONSHU, JAPAN
Alert Version: 1Sunday, July 4th, 2010 at 21:55:51 GMTLocation: 39.7° N, 142.5° EDepth: 24kmEvent Id: US2010YHBPCreated: 24 minutes, 26 seconds after earthquake.
Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. A magnitude 7.0 earthquake 76 km Northwest of this one struck Japan on January 6, 1995 (UTC), with estimated population exposures of 8,000 at intensity VIII and 511,000 at intensity VII, with no reported fatalities. On June 12, 1978 (UTC), a magnitude 7.6 earthquake 170 km South of this one struck Miyagi-Oki, Japan, with estimated population exposures of 1,303,000 at intensity VIII and 2,557,000 at intensity VII, resulting in a reported 22 fatalities. Recent earthquakes in this area have caused landslides and fires that may have contributed to losses.
Overall, the population in this region resides in structures that are a mix of vulnerable and earthquake resistant construction. A magnitude 7.0 earthquake 76 km Northwest of this one struck Japan on January 6, 1995 (UTC), with estimated population exposures of 8,000 at intensity VIII and 511,000 at intensity VII, with no reported fatalities. On June 12, 1978 (UTC), a magnitude 7.6 earthquake 170 km South of this one struck Miyagi-Oki, Japan, with estimated population exposures of 1,303,000 at intensity VIII and 2,557,000 at intensity VII, resulting in a reported 22 fatalities. Recent earthquakes in this area have caused landslides and fires that may have contributed to losses.
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 | 76k | Strong | Light | Moderate |
| V | 228k | Moderate | V. Light | Light |
| IV | 2,806k | Light | none | none |
| II-III | 5,631k* | 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  | Selected 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.
http://earthquake.usgs.gov/earthquakes/pager/events/us/2010yhbp/index.html
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