Sedimentary record of historical seismicity  in a small, southern Oregon lake

Morey, Ann E.; Shapley, Mark D.; Gavin, Daniel G.; Nelson, Alan R.; Goldfinger, Chris

doi:https://doi.org/10.5194/nhess-24-4523-2024

Articles | Volume 24, issue 12

https://doi.org/10.5194/nhess-24-4523-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-24-4523-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 12

Research article

|

11 Dec 2024

Research article |

| 11 Dec 2024

Sedimentary record of historical seismicity in a small, southern Oregon lake

Ann E. Morey, Mark D. Shapley, Daniel G. Gavin, Alan R. Nelson, and Chris Goldfinger

Supplement

https://doi.org/10.5194/nhess-24-4523-2024-supplement

Data sets

Bathymetric data for upper and lower Acorn Woman Lakes Ann E. Morey https://doi.org/10.5281/zenodo.13821157

XRD for provenance Ann E. Morey https://doi.org/10.5281/zenodo.13891796

Computed Tomography and XRF data for core SQB5 (Lower Acorn Woman Lake) Ann E. Morey https://doi.org/10.5281/zenodo.13855178

Model code and software

Oxcal model code for "A 2700-year record of Cascadia megathrust and crustal/slab earthquakes from Acorn Woman Lakes, Oregon'' Ann E. Morey https://doi.org/10.5281/zenodo.13821040

Short summary

Disturbance events from historical sediments from a small lake in Oregon were evaluated to determine if Cascadia megathrust earthquakes are uniquely identifiable. Geochemical provenance data identify two likely Cascadia earthquakes, one from 1700 CE and the other from 1873 CE. A crustal earthquake deposit and flood deposits were also uniquely identified, suggesting that small Cascadia lakes are good recorders of megathrust earthquakes and other disturbances.