Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults
Abstract We present an analysis of magnitude clustering of microfractures inferred from acoustic emissions (AEs) during stick‐slip (SS) dynamics of faulted Westerly granite samples in frictional sliding experiments, with and without fluids, under triaxial loading with constant displacement rate. We...
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| Format: | Article |
| Language: | English |
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Wiley
2024-10-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL109865 |
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| author | Omid Khajehdehi Thomas H. W. Goebel Georg Dresen Jörn Davidsen |
| author_facet | Omid Khajehdehi Thomas H. W. Goebel Georg Dresen Jörn Davidsen |
| author_sort | Omid Khajehdehi |
| collection | DOAJ |
| description | Abstract We present an analysis of magnitude clustering of microfractures inferred from acoustic emissions (AEs) during stick‐slip (SS) dynamics of faulted Westerly granite samples in frictional sliding experiments, with and without fluids, under triaxial loading with constant displacement rate. We investigate magnitude clustering in time across periods during, preceding and after macroscopic slip events on laboratory faults. Our findings reveal that magnitude clustering exists such that subsequent AEs tend to have more similar magnitudes than expected. Yet, this clustering only exists during macroscopic slip events and is strongest during major slip events in fluid‐saturated and dry samples. We demonstrate that robust magnitude clustering arises from variations in frequency‐magnitude distributions of AE events during macroscopic slip events. These temporal variations indicate a prevalence of larger AE events right after (0.3–3 s) the SS onset. Hence, magnitude clustering is a consequence of non‐stationarities. |
| format | Article |
| id | doaj-art-122c3cc6a2e04a43a1d9e4b4ed59eb25 |
| institution | Kabale University |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-122c3cc6a2e04a43a1d9e4b4ed59eb252024-11-11T10:10:52ZengWileyGeophysical Research Letters0094-82761944-80072024-10-015120n/an/a10.1029/2024GL109865Magnitude Clustering During Stick‐Slip Dynamics on Laboratory FaultsOmid Khajehdehi0Thomas H. W. Goebel1Georg Dresen2Jörn Davidsen3Complexity Science Group Department of Physics and Astronomy University of Calgary Calgary AB CanadaCenter for Earthquake Research and Information University of Memphis Memphis TN USAHelmholtz Centre Potsdam GFZ German Research Centre for Geosciences Section 4.2: Geomechanics and Scientific Drilling Potsdam GermanyComplexity Science Group Department of Physics and Astronomy University of Calgary Calgary AB CanadaAbstract We present an analysis of magnitude clustering of microfractures inferred from acoustic emissions (AEs) during stick‐slip (SS) dynamics of faulted Westerly granite samples in frictional sliding experiments, with and without fluids, under triaxial loading with constant displacement rate. We investigate magnitude clustering in time across periods during, preceding and after macroscopic slip events on laboratory faults. Our findings reveal that magnitude clustering exists such that subsequent AEs tend to have more similar magnitudes than expected. Yet, this clustering only exists during macroscopic slip events and is strongest during major slip events in fluid‐saturated and dry samples. We demonstrate that robust magnitude clustering arises from variations in frequency‐magnitude distributions of AE events during macroscopic slip events. These temporal variations indicate a prevalence of larger AE events right after (0.3–3 s) the SS onset. Hence, magnitude clustering is a consequence of non‐stationarities.https://doi.org/10.1029/2024GL109865magnitude clusteringstick‐slipacoustic emissiontriggeringlaboratory faultstress relaxation |
| spellingShingle | Omid Khajehdehi Thomas H. W. Goebel Georg Dresen Jörn Davidsen Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults Geophysical Research Letters magnitude clustering stick‐slip acoustic emission triggering laboratory fault stress relaxation |
| title | Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults |
| title_full | Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults |
| title_fullStr | Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults |
| title_full_unstemmed | Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults |
| title_short | Magnitude Clustering During Stick‐Slip Dynamics on Laboratory Faults |
| title_sort | magnitude clustering during stick slip dynamics on laboratory faults |
| topic | magnitude clustering stick‐slip acoustic emission triggering laboratory fault stress relaxation |
| url | https://doi.org/10.1029/2024GL109865 |
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