Comprehensive clues provided by popular free remote sensing imagery to interpretation of geophysical studies explained by example cases of magnetic surveys | ||
| NRIAG Journal of Astronomy and Geophysics | ||
| Volume 2, Issue 2, December 2013, Pages 278-286 PDF (5.1 M) | ||
| DOI: 10.1016/j.nrjag.2013.12.006 | ||
| Author | ||
| Diaa Hamed | ||
| Abstract | ||
| State-of-the-art remote sensing technologies for imaging the earth and its shallow subsurface are invaluable tools for sophisticated geophysical subsurface investigations. However, such type of remote sensing products remains inaccessible for most of geophysicists. On the other hand free simple satellite imagery has been commonly available since mid-last decade. Google Earth is a popular free Internet application through which users can view landscapes and maps. In this work it is shown how easy and efficient it is to access the open-source of remote sensing in geophysical surveys to provide a quick overview for survey plans and comprehensive keys for interpretation based on cases of magnetic measurements. A dry well that has been drilled in an aquifer few tens of meters away from a productive water well in Dahshour has been preliminary explained by considering Google Earth images. The images of the area show clear differentiation of surface lithology into 2 zones with a sharp interface. Magnetic anomaly map of Dahshour fault raised two unclear features that might be interpreted by a curvature in Dahshour fault plane and an additional perpendicular fault trending N–S. The Google Earth imagery gives clues to basaltic intrusions to be the cause of the suspected gradients. A continuous boat-born magnetic survey carried out in Nasser Lake, southern High Dam, reveals several characteristic anomalies. Visual inspection of Google-Earth images at various altitudes (zooms) indicates a relation between the anomalies and major faulting structures. | ||
| Keywords | ||
| geophysics; Magnetic survey; Remote Sensing | ||
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