WITHDRAWN The 2024 M7.0 Offshore Cape Mendocino Sequence: Insights from Enhanced Catalogs of Earthquake Locations, Focal Mechanisms and Repeating Events
Description:
WITHDRAWN On Dec. 5, 2024, a magnitude 7.0 earthquake occurred west of the Mendocino Triple Junction (MTJ) along the transform Mendocino Fault Zone (MFZ). To better delineate the seismogenic fault structures and their slip behaviors during this sequence, we implemented a deep-learning-based workflow to build high-resolution catalogs of earthquake locations and focal mechanisms. The relocated aftershocks mainly concentrated along the MFZ, where we also detected ~20 newly emerged sequences of repeating earthquakes following the mainshock, suggesting an episode of aseismic slip. To the north of the MFZ in the Gorda plate, we observed several clusters of aftershocks, which may correspond to smaller fault segments activated by stress transfer. We have improved both onshore and offshore focal mechanisms. Combined with the estimated moment tensor solutions of the mainshock and its aftershocks (M>3.5), our results suggest a diverse range of faulting mechanisms in this sequence. Our findings indicate the potential fault interactions during this offshore earthquake sequence and emphasize the complex tectonic environment around the MTJ.
Session: Late-breaking on Recent and Future Large Earthquakes [Poster]
Type: Poster
Date: 4/15/2025
Presentation Time: 08:00 AM (local time)
Presenting Author: Junhao
Student Presenter: No
Invited Presentation:
Poster Number: 146
Authors
Junhao Song Presenting Author Corresponding Author sjh2019@link.cuhk.edu.hk University of California, Berkeley |
Bo Rong borong@berkeley.edu University of California, Berkeley |
Taka'aki Taira taira@berkeley.edu University of California, Berkeley |
Weiqiang Zhu zhuwq@berkeley.edu University of California, Berkeley |
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WITHDRAWN The 2024 M7.0 Offshore Cape Mendocino Sequence: Insights from Enhanced Catalogs of Earthquake Locations, Focal Mechanisms and Repeating Events
Category
Late-breaking on Recent and Future Large Earthquakes