Are Low‐Frequency Earthquake Moments Area‐ or Slip‐Limited? A Rock Record Examination

نویسندگان

چکیده

The seismic moments observed for low-frequency earthquakes (LFEs) vary over multiple orders of magnitude, even where the LFEs occur within families similar events. Although this variability is typically interpreted to record a scale-limited process at LFE source, neither slip per nor rupture area can be determined from seismological constraints. Here, we examine incrementally developed slickenfibers that have been proposed in exhumed subduction zones. These structures form through repeated, micron-scale events across dilational irregularities fault plane, which are punctuated by cementation and sealing interstitial space. By statistically analyzing geometry inclusion trails delineating slip-parallel mineral-growth increments, constrain inferred test end-member hypotheses regarding controls on moments. We find exhibit characteristic favoring “slip-limited” model requires large areas.

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ژورنال

عنوان ژورنال: Geophysical Research Letters

سال: 2022

ISSN: ['1944-8007', '0094-8276']

DOI: https://doi.org/10.1029/2021gl095759