| description:
|
This map is intended to provide nontechnical users with an estimate of the geographic distribution of building damage during a Portland Hills Fault Magnitude 6.8 Earthquake. The damage categories are taken from the Modified Mercalli Intensity scale, which is based on observed effects on people, objects, and buildings. The damage potential categories are derived from the peak ground velocity developed for this project. The peak ground velocity breakpoints are established by Wald and others (2006). Further information is available at https://earthquake.usgs.gov/learn/topics/mercalli.php. |