Damage Proxy Map
Description
Estimates from satellite radar of where the earthquake has caused significant
damage. Red color indicates regions that have been disrupted, where darker red
indicates greater change. The radar-based Damage Proxy Map detects damage
caused by building collapse, tsunami inundation, landslides, and liquefaction.
Use for decision making
When combined with building maps, the damage proxy map can be used to identify
structures that have been damaged by the earthquake. The maps are also useful for
identifying scale of damage over large regions, as well as damage in remote regions
where communication from the ground is not available and/or access is difficult.
Data Availability
Maps are available between within a day to several days after the earthquake,
depending on the availability of earliest post earthquake radar observations.
Download KMZ file here:
http://akshield.pbworks.com/w/file/77762993/ARIA_DPM.kml
Additional Information
Derived from Interferometric Synthetic Aperture Radar (InSAR) observations of
ALOS PALSAR sensor. The red pixels (individual pixel size: 15m x 30m) represent
ground surface or building structure damage due to the seismic waves and tsunami
waves. The simulation was based on the inundation maps in the investigation report
"Tsunami Inundation maps of Seward ad Nothern Resurrection Bay, Alaska"
published by State of Alaska, Department of Natural Resources, Division of
Geological & Geophysical Surveys in 2010.
Since the maps are based on radar observations and not optical images, the post
earthquake images are not blocked by clouds and can be acquired day or night,
providing information under conditions. The map compares disruption between
two images that span the earthquake and two images both taken before the
earthquake. Change due to other significant events (floods, storms, aftershocks)
may be captured in the “Mainshock Damage Proxy Map”, depending on the timing of
the radar observations.
Contact Information
The Damage Proxy Map is provided by the ARIA project. Contact Sang-Ho Yun
(Sang-Ho.Yun@jpl.nasa.gov, 818-354-4125) or Susan Owen
(Susan.Owen@jpl.nasa.gov, 818-393-2524) for more information.
Horizontal and Vertical Movement
Maps
Description
Permanent horizontal and vertical movement caused by the earthquake. The
movement shown is relative to the land’s geographical coordinates before the
earthquake. The maps are based on measurements interpolated from available
Plate Boundary Observatory Continuous GPS stations near the earthquake and are
not based on models.
Use for decision making
These maps can be useful for identifying areas that have been disrupted by large
ground movements, for example coastlines that have been uplifted by several feet.
These maps can also be used to identify the geographical region impacted by the
earthquake.
Data Availability
Initial maps are available within minutes after the earthquake. Updates from
additional data will be provided in a few hours, and continually updated as more
data arrives.
Download kmz files here:
http://akshield.pbworks.com/w/file/77601140/ARIA%20Horizontal%20Displace
ment%20from%20GPS.kmz
http://akshield.pbworks.com/w/file/77601155/ARIA%20Vertical%20Displaceme
nt%20from%20GPS.kmz
Additional Information
The movement shown is relative to the land’s geographical coordinates before the
earthquake. The maps are based on interpolated measurements from available
Plate Boundary Observatory Continuous GPS stations near the earthquake and are
not based on models.
Contact Information
The Horizontal and Vertical Movement Maps are provided by the ARIA project.
Contact Angelyn Moore (Angelyn.Moore@jpl.nasa.gov, 818-354-5434) or Susan
Owen (Susan.Owen@jpl.nasa.gov, 818-393-2524) for more information.
Damage Data Feed
Description
A stream of geographical coordinates, with descriptive text tags, that have been
identified using both the Damage Proxy Map and additional data layers, for example
critical infrastructure maps, landslide probability maps or liquefaction probability
maps.
Use for decision making
The data feed will provide specific information on locations that need attention from
disaster response teams.
Data Availability
The Damage Data Feed will be available after the Damage Proxy Map is released.
JPL/ARIA Damage Proxy Maps are available between within a day to several days
after the earthquake, depending on the availability of earliest post earthquake radar
observations.
Contact Information
The Damage Proxy Map is provided by the ARIA project. Contact Sang-Ho Yun
(Sang-Ho.Yun@jpl.nasa.gov, 818-354-4125) or Susan Owen
(Susan.Owen@jpl.nasa.gov, 818-393-2524) for more information.