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Article

The Lavic Lake Fault: A Long-Term Cumulative Slip Analysis via Combined Field Work and Thermal Infrared Hyperspectral Airborne Remote Sensing

1
California Institute of Technology, Division of Geological and Planetary Sciences, 1200 E. California Blvd., MC 170-25, Pasadena, CA 91125, USA
2
The Aerospace Corporation, 2310 E. El Segundo Blvd., El Segundo, CA 90245, USA
3
Thule Scientific, P.O. Box 953, Topanga, CA 90290, USA
4
College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, Corvallis, OR 97331-5503, USA
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(21), 3586; https://0-doi-org.brum.beds.ac.uk/10.3390/rs12213586
Received: 6 October 2020 / Revised: 26 October 2020 / Accepted: 29 October 2020 / Published: 1 November 2020
(This article belongs to the Special Issue Hyperspectral and Multispectral Imaging in Geology)
The 1999 Hector Mine earthquake ruptured to the surface in eastern California, with >5 m peak right-lateral slip on the Lavic Lake fault. The cumulative offset and geologic slip rate of this fault are not well defined, which inhibits tectonic reconstructions and risk assessment of the Eastern California Shear Zone (ECSZ). With thermal infrared hyperspectral airborne imagery, field data, and auxiliary information from legacy geologic maps, we created lithologic maps of the area using supervised and unsupervised classifications of the remote sensing imagery. We optimized a data processing sequence for supervised classifications, resulting in lithologic maps over a test area with an overall accuracy of 71 ± 1% with respect to ground-truth geologic mapping. Using all of the data and maps, we identified offset bedrock features that yield piercing points along the main Lavic Lake fault and indicate a 1036 +27/−26 m net slip, with 1008 +14/−17 m horizontal and 241 +51/−47 m vertical components. For the contribution from distributed shear, modern off-fault deformation values from another study imply a larger horizontal slip component of 1276 +18/−22 m. Within the constraints, we estimate a geologic slip rate of <4 mm/yr, which does not increase the sum geologic Mojave ECSZ rate to current geodetic values. Our result supports previous suggestions that transient tectonic activity in this area may be responsible for the discrepancy between long-term geologic and present-day geodetic rates. View Full-Text
Keywords: hector mine earthquake; lavic lake fault; thermal infrared hyperspectral airborne imagery, net slip, eastern california shear zone hector mine earthquake; lavic lake fault; thermal infrared hyperspectral airborne imagery, net slip, eastern california shear zone
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MDPI and ACS Style

Witkosky, R.A.; Stock, J.M.; Tratt, D.M.; Buckland, K.N.; Adams, P.M.; Johnson, P.D.; Lynch, D.K.; Sousa, F.J. The Lavic Lake Fault: A Long-Term Cumulative Slip Analysis via Combined Field Work and Thermal Infrared Hyperspectral Airborne Remote Sensing. Remote Sens. 2020, 12, 3586. https://0-doi-org.brum.beds.ac.uk/10.3390/rs12213586

AMA Style

Witkosky RA, Stock JM, Tratt DM, Buckland KN, Adams PM, Johnson PD, Lynch DK, Sousa FJ. The Lavic Lake Fault: A Long-Term Cumulative Slip Analysis via Combined Field Work and Thermal Infrared Hyperspectral Airborne Remote Sensing. Remote Sensing. 2020; 12(21):3586. https://0-doi-org.brum.beds.ac.uk/10.3390/rs12213586

Chicago/Turabian Style

Witkosky, Rebecca A., Joann M. Stock, David M. Tratt, Kerry N. Buckland, Paul M. Adams, Patrick D. Johnson, David K. Lynch, and Francis J. Sousa 2020. "The Lavic Lake Fault: A Long-Term Cumulative Slip Analysis via Combined Field Work and Thermal Infrared Hyperspectral Airborne Remote Sensing" Remote Sensing 12, no. 21: 3586. https://0-doi-org.brum.beds.ac.uk/10.3390/rs12213586

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