The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands
Observations since 1998 have revealed that repeating earthquakes, and particularly small repeating earthquakes, occur less often than expected given their seismically derived slip and the regional fault slip rate. Here we test the hypothesis that small repeaters occur infrequently because they occur...
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| Format: | Journal article |
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American Geophysical Union
2019
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| _version_ | 1826284911417360384 |
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| author | Williams, JR Hawthorne, JC Lengline, O |
| author_facet | Williams, JR Hawthorne, JC Lengline, O |
| author_sort | Williams, JR |
| collection | OXFORD |
| description | Observations since 1998 have revealed that repeating earthquakes, and particularly small repeating earthquakes, occur less often than expected given their seismically derived slip and the regional fault slip rate. Here we test the hypothesis that small repeaters occur infrequently because they occur on fault segments or strands with low slip rates. We analyze the recurrence interval-moment scaling of earthquake sequences near Parkfield, California. We find that closely spaced sequences, which likely occur on the same fault strand and respond to the same slip rate, follow a M1/30 scaling consistent with seismic slip rates while widely spaced sequences, which likely occur on different strands, follow a M0.170 scaling consistent with the previous counterintuitive observations. These results suggest that spatially varying slip rates could create the M0.170 recurrence interval scaling, though we cannot exclude other explanations. |
| first_indexed | 2024-03-07T01:20:57Z |
| format | Journal article |
| id | oxford-uuid:904d42e5-d20f-48c4-a6c2-0bd14735db6d |
| institution | University of Oxford |
| last_indexed | 2024-03-07T01:20:57Z |
| publishDate | 2019 |
| publisher | American Geophysical Union |
| record_format | dspace |
| spelling | oxford-uuid:904d42e5-d20f-48c4-a6c2-0bd14735db6d2022-03-26T23:10:46ZThe long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strandsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:904d42e5-d20f-48c4-a6c2-0bd14735db6dSymplectic Elements at OxfordAmerican Geophysical Union2019Williams, JRHawthorne, JCLengline, OObservations since 1998 have revealed that repeating earthquakes, and particularly small repeating earthquakes, occur less often than expected given their seismically derived slip and the regional fault slip rate. Here we test the hypothesis that small repeaters occur infrequently because they occur on fault segments or strands with low slip rates. We analyze the recurrence interval-moment scaling of earthquake sequences near Parkfield, California. We find that closely spaced sequences, which likely occur on the same fault strand and respond to the same slip rate, follow a M1/30 scaling consistent with seismic slip rates while widely spaced sequences, which likely occur on different strands, follow a M0.170 scaling consistent with the previous counterintuitive observations. These results suggest that spatially varying slip rates could create the M0.170 recurrence interval scaling, though we cannot exclude other explanations. |
| spellingShingle | Williams, JR Hawthorne, JC Lengline, O The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
| title | The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
| title_full | The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
| title_fullStr | The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
| title_full_unstemmed | The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
| title_short | The long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
| title_sort | long recurrence intervals of small repeating earthquakes may be due to the slow slip rates of small fault strands |
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