Landers earthquake fault scarp Structure from motion

I made a movie of structure from motion high resolution view of 1992 Landers California earthquake fault scarp. Video starts with 2012 hillshade (Johnson, et al., 2014; available from OpenTopography here: link) in Google Earth to show location and then to a ground based set of photographs (see blue rectangles as focal planes) visualized in Agisoft Photoscan.

I am pretty pleased that the ground-based model worked so well. Now we can move forward with fine scale alignment with earlier topographic point clouds and compute differences over the 25 years since the earthquake--a project I have worked on with Dallas Rhodes for many years (see Arrowsmith and Rhodes, 1994 and also Haddad, et al., 2012).

See also these posts:

2015 Anniversary of 1992 Landers California earthquake

SfM mapping--also has an orthophoto kmz of the Johnson, et al., 2014 data

Structure from Motion micro documentary from Merri Lisa Trigilio

References:

• Arrowsmith, J. R., & Rhodes, D. D. (1994). Original forms and initial modifications of the Galway Lake Road scarp formed along the Emerson Fault during the 28 June 1992 Landers, California, earthquake. Bulletin - Seismological Society of America, 84.
• Haddad, D. E., Akciz, S. O., Arrowsmith, J. R., Rhodes, D. D., Oldow, J. S., Zielke, O., … Shilpakar, P. (2012). Applications of airborne and terrestrial laser scanning to paleoseismology. Geosphere, 8(4). https://doi.org/10.1130/GES00701.1
• Johnson, K., Nissen, E., Saripalli, S., Arrowsmith, J. R., McGarey, P., Scharer, K., … Blisniuk, K. (2014). Rapid mapping of ultrafine fault zone topography with structure from motion. Geosphere, 10(5). https://doi.org/10.1130/GES01017.1

New report: NASA Challenges and Opportunities for Research in Earth Surface and Interiors

The new report: NASA Challenges and Opportunities for Research in Earth Surface and Interiors has just been released officially. The main link to download is here: PDF.

I was honored to be on the writing team and contributed to the surface process, human activities, topography, increasingly interconnected world, and professional development portions. We were charged with revisiting and updating the 2002 Solid Earth Science Working Group report “Living on a Restless Planet” (the SESWG Report). The update follows the SESWG framework and updates on many of the science and technology topics and will help to chart NASA Earth Sciences and Interiors priorities.

Thanks to the rest of the committee, our co chairs James Davis and Louise Kellogg, and Ben Phillips from NASA.