Airborne lidar and electro-optical imagery along surface ruptures of the 2019 Ridgecrest earthquake sequence, Southern California

Seismological Research Letters
By: , and 
Edited by: Benjamin A. BrooksKatherine ScharerJanis HernandezTimothy E. DawsonMike OskinRamon ArrowsmithChristine A. GouletKelly BlakeMatt BoggsStephan BorkCraig GlennieJ.C. Fernandez-DiazAbhinav SinghaniaDarren L. Hauser, and Sven Sorhus

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Abstract

Surface rupture from the 2019 Ridgecrest earthquake sequence, initially associated with the M 6.4 foreshock, occurred on July 4 on a ~17 km long, northeast-southwest oriented, left-lateral zone of faulting. Following the M 7.1 mainshock on July 5 (local time), extensive northwest-southeast-oriented, right-lateral faulting was then also mapped along a ~50 km long zone of faults, including sub-parallel splays in several areas. The largest slip was observed in the epicentral area, and crossing the dry lakebed of China Lake to the southeast. Surface fault rupture mapping by a large team, reported elsewhere, was used to guide the airborne data acquisition reported here. Rapid rupture mapping allowed for accurate and efficient flight line planning for the high-resolution lidar and aerial photography. Flight line planning trade-offs were considered to allocate the medium (25 pulses per square meter, or ppsm) and high resolution (80 ppsm) lidar data collection polygons. The National Center for Airborne Laser Mapping (NCALM) acquired the airborne imagery with a Titan multispectral lidar system and DiMAC aerial digital camera, and USGS acquired GPS ground control data. This effort required extensive coordination with the Navy as much of the airborne data acquisition occurred within their restricted airspace at the China Lake Ranges.

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Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Airborne lidar and electro-optical imagery along surface ruptures of the 2019 Ridgecrest earthquake sequence, Southern California
Series title Seismological Research Letters
DOI 10.1785/0220190338
Volume 91
Issue 4
Year Published 2020
Language English
Publisher Seismological Society of America
Contributing office(s) Earthquake Science Center
Description 11 p.
First page 2096
Last page 2107
Country United States
State Calilfornia
Other Geospatial Ridgecrest Earthquake Sequence
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