Observations From the 2019 Ridgecrest Earthquake Sequence
The Mw 7.1 July 5 mainshock of the 2019 Ridgecrest Earthquake Sequence was the largest earthquake in California in the 20 years since the 1999 Mw 7.1 Hector Mine event and the first major earthquake in southern California since the regional seismic monitoring was expanded to pave the way for earthquake early warning. Over the past 20 years, our community has developed many advances in methods and technology used to observe pre-, co- and post-seismic deformation due to earthquakes. Such advances include the use of aerial and terrestrial lidar, image correlation methods, low-altitude aerial photography, interferometric synthetic-aperture radar (InSAR) and dense deployments of geophysical and geodetic sensors in both permanent and campaign arrays. In addition to augmenting the methods in our collective toolbox, we have learned from other continental strike-slip earthquakes in these intervening 20 years, allowing us to target fundamental questions and high-resolution datasets to characterize earthquake processes and fault behavior. These investigations include, as an example, coupling field and remote-sensing approaches to determine fine-scale slip distributions along and across fault strike to quantify strain partitioning and off-fault deformation. We welcome contributions with direct observations of the 2019 Ridgecrest Earthquake Sequence, including the July 4 Mw 6.4 foreshock event, that elucidate processes specific to this sequence that will help us better understand the behavior of earthquake and fault processes, as well as the characteristics of ground motions from large crustal earthquakes, globally.
Conveners
Alexandra E. Hatem, U.S. Geological Survey (ahatem@usgs.gov); Susan Hough, U.S. Geological Survey (hough@usgs.gov); Christopher W. D. Milliner, Jet Propulsion Laboratory, Caltech (christopher.milliner@jpl.nasa.gov); Sinan Akciz, California State University, Fullerton (sakciz@fullerton.edu); Alana Williams, Arizona State University (amwill25@asu.edu); Timothy Dawson, California Geological Survey (timothy.dawson@conservation.ca.gov)
Oral Presentations
| Participant Role | Details | Start Time | Minutes | Action |
|---|---|---|---|---|
| Submission | Evidence of Previous Late Quaternary Faulting Along the 2019 Ridgecrest Earthquake Ruptures | 02:30 PM | 15 | View |
| Submission | SAR Imaging of the Coseismic and Postseismic Deformation From the 2019 M7.1 and M6.4 Ridgecrest Earthquakes in California | 02:45 PM | 15 | View |
| Submission | Crustal Deformation Before, During and After the 2019 Ridgecrest Earthquakes from Campaign and Continuous GNSS Data | 03:00 PM | 15 | View |
| Submission | Development of a Geodetic-Based Probabilistic Fault Displacement Hazard Analysis Using Near-Field Geodetic Imaging Data: Examples from the 2019 Ridgecrest Earthquake Sequence | 03:15 PM | 15 | View |
| Submission | Targeted High-Resolution Structure from Motion Observations Over the M6.4 and M7.1 Ruptures of the Ridgecrest Earthquake Sequence | 03:30 PM | 15 | View |
| Other Time | Break | 03:45 PM | 45 | |
| Submission | Observed Surface Wave Energy in the Los Angeles Basin Induced by the 6 July 2019 M7.1 Ridgecrest Earthquake | 04:30 PM | 15 | View |
| Submission | Engineering Characteristics and Damage Potential of Ground Motions Recorded in the 2019 Ridgecrest Earthquake Sequence | 04:45 PM | 15 | View |
| Submission | Temporal Seismic Velocity Variations: Recovery Following From the 2019 M7.1 Ridgecrest Earthquake | 05:00 PM | 15 | View |
| Submission | Absolute Location of 2019 Ridgecrest Seismicity Reveals Duplex M6.4 Ruptures, Migrating and Pulsing M7.1 Foreshocks and Unusually Shallow Mw7.1 Nucleation. Did the M7.1 Rupture Require Incitation by M6.4-Like Rupture? | 05:15 PM | 15 | View |
| Total: | 180 Minute(s) |
Observations From the 2019 Ridgecrest Earthquake Sequence
Description