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TitleRemote sensing looks at an intraplate earthquake surface rupture
AuthorLamontagne, MORCID logo; Graham, D F
SourceEos, Transactions of the American Geophysical Union vol. 74, no. 32, 1994 p. 353, 357,
Alt SeriesGeological Survey of Canada, Contribution Series 17693
Mediapaper; on-line; digital
File formatpdf
AreaUngava Peninsula
Lat/Long WENS -71.0000 -70.4167 60.2500 60.0000
Subjectsgeophysics; remote sensing; satellite imagery; earthquake studies; earthquakes; lineations; structural features; magnetic interpretations; magnetic surveys, airborne; magnetic surveys; geophysical surveys; radar methods; displacement; synthetic aperture radar surveys (SAR); Quaternary
Illustrationssketch maps
AbstractOn December 25, 1989, a magnitude Ms 6.3 earthquake in the Ungava peninsula of Northern Quebec, Canada, produced the first surface rupture in Eastern North America [Adams et al., 1991]. An integrated analysis of remotely sensed data and total field aeromagnetic was done to improve our understanding of the earthquake's regional geological environment. Lineament information extracted from remotely sensed and magnetic data can provide additional geological constraints to seismic hazard assessment. Much emphasis has been placed on Synthetic Aperture Radar (SAR) data in the promotion of remotely sensed data within the Geological Survey of Canada. Nationally and internationally, SAR data has been proven to be an effective tool for Earth sensing. As a result, many countries are developing spaceborne radar systems: Canada (RADARSAT), the United States (SIR-C), Europe (ERS-1), and Japan (JERS-1). Active radar imaging using longer electromagnetic wavelengths penetrates cloud cover independent of Sun illumination. This effectively allows all-weather data collection. SAR side-viewing geometry offers a unique pseudo-three-dimensional view of the terrain surface, enhancing terrain geometry and surface roughness.

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