Global seismology in the interior of Enceladus

K. Dapré; J.C.E. Irving

doi:10.1016/j.icarus.2023.115806

Global seismology in the interior of Enceladus

K. Dapré^*, J.C.E. Irving

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

1 Citation (Scopus)

Abstract

Enceladus is an astrobiologically compelling target for scientific study and is predicted to have high seismic activity for its size, particularly at its south pole. We conduct ray-theoretical and full-waveform seismic simulations for three 1D models of Enceladus to compare the effects of ice shell and ocean thickness, as well as core structure and composition, on the waveforms recorded by a single seismometer. The 1D models are constructed using self-consistent modelling techniques to enable direct comparisons between the wavefields of each model. We investigate phases sampling the ice, ocean, and core layers at up to 8 Hz, complementing previous studies focussed on lower-frequency phases concentrated in the ice shell. We conclude that even at low epicentral distances (
30°) from a source at the south pole, core-transmitted and -reflected phases can likely both be observed, providing constraints on ocean depth and core structure. We further confirm that a high-attenuation scenario for the ice shell does not preclude the generation of seismic signals above mission-candidate instrument sensitivity thresholds, and in fact may serve to remove unwanted signals from seismograms.

Original language	English
Article number	115806
Journal	Icarus
Volume	408
Early online date	5 Oct 2023
DOIs	https://doi.org/10.1016/j.icarus.2023.115806
Publication status	Published - 15 Jan 2024

Bibliographical note

Funding Information:
This work was carried out using the computational and data storage facilities of the Advanced Computing Research Centre, University of Bristol - http://www.bristol.ac.uk/acrc/ . We would particularly like to thank Dianaimh Greene for assistance with HPC processing. We also thank two anonymous reviewers for their constructive comments, which improved the final paper. KD acknowledges support from STFC studentship ST/V506564/1 . JCEI acknowledges UKSA grant ST/W002515/1 .

Funding Information:
This work was carried out using the computational and data storage facilities of the Advanced Computing Research Centre, University of Bristol - http://www.bristol.ac.uk/acrc/. We would particularly like to thank Dianaimh Greene for assistance with HPC processing. We also thank two anonymous reviewers for their constructive comments, which improved the final paper. KD acknowledges support from STFC studentship ST/V506564/1. JCEI acknowledges UKSA grant ST/W002515/1.

Publisher Copyright:
© 2023 The Author(s)

Access to Document

10.1016/j.icarus.2023.115806Licence: CC BY

Handle.net

Persistent link

HPC (High Performance Computing) and HTC (High Throughput Computing) Facilities
Alam, S. R. (Manager), Williams, D. A. G. (Manager), Eccleston, P. E. (Manager) & Greene, D. (Manager)
Facility/equipment: Facility

Cite this

@article{44ad732281114fa4a1278bd89e23cac1,

title = "Global seismology in the interior of Enceladus",

abstract = "Enceladus is an astrobiologically compelling target for scientific study and is predicted to have high seismic activity for its size, particularly at its south pole. We conduct ray-theoretical and full-waveform seismic simulations for three 1D models of Enceladus to compare the effects of ice shell and ocean thickness, as well as core structure and composition, on the waveforms recorded by a single seismometer. The 1D models are constructed using self-consistent modelling techniques to enable direct comparisons between the wavefields of each model. We investigate phases sampling the ice, ocean, and core layers at up to 8 Hz, complementing previous studies focussed on lower-frequency phases concentrated in the ice shell. We conclude that even at low epicentral distances ( 30°) from a source at the south pole, core-transmitted and -reflected phases can likely both be observed, providing constraints on ocean depth and core structure. We further confirm that a high-attenuation scenario for the ice shell does not preclude the generation of seismic signals above mission-candidate instrument sensitivity thresholds, and in fact may serve to remove unwanted signals from seismograms.",

author = "K. Dapr{\'e} and J.C.E. Irving",

note = "Funding Information: This work was carried out using the computational and data storage facilities of the Advanced Computing Research Centre, University of Bristol - http://www.bristol.ac.uk/acrc/ . We would particularly like to thank Dianaimh Greene for assistance with HPC processing. We also thank two anonymous reviewers for their constructive comments, which improved the final paper. KD acknowledges support from STFC studentship ST/V506564/1 . JCEI acknowledges UKSA grant ST/W002515/1 . Funding Information: This work was carried out using the computational and data storage facilities of the Advanced Computing Research Centre, University of Bristol - http://www.bristol.ac.uk/acrc/. We would particularly like to thank Dianaimh Greene for assistance with HPC processing. We also thank two anonymous reviewers for their constructive comments, which improved the final paper. KD acknowledges support from STFC studentship ST/V506564/1. JCEI acknowledges UKSA grant ST/W002515/1. Publisher Copyright: {\textcopyright} 2023 The Author(s)",

year = "2024",

month = jan,

day = "15",

doi = "10.1016/j.icarus.2023.115806",

language = "English",

volume = "408",

journal = "Icarus",

issn = "0019-1035",

publisher = "Academic Press",

}

TY - JOUR

T1 - Global seismology in the interior of Enceladus

AU - Dapré, K.

AU - Irving, J.C.E.

N1 - Funding Information: This work was carried out using the computational and data storage facilities of the Advanced Computing Research Centre, University of Bristol - http://www.bristol.ac.uk/acrc/ . We would particularly like to thank Dianaimh Greene for assistance with HPC processing. We also thank two anonymous reviewers for their constructive comments, which improved the final paper. KD acknowledges support from STFC studentship ST/V506564/1 . JCEI acknowledges UKSA grant ST/W002515/1 . Funding Information: This work was carried out using the computational and data storage facilities of the Advanced Computing Research Centre, University of Bristol - http://www.bristol.ac.uk/acrc/. We would particularly like to thank Dianaimh Greene for assistance with HPC processing. We also thank two anonymous reviewers for their constructive comments, which improved the final paper. KD acknowledges support from STFC studentship ST/V506564/1. JCEI acknowledges UKSA grant ST/W002515/1. Publisher Copyright: © 2023 The Author(s)

PY - 2024/1/15

Y1 - 2024/1/15

N2 - Enceladus is an astrobiologically compelling target for scientific study and is predicted to have high seismic activity for its size, particularly at its south pole. We conduct ray-theoretical and full-waveform seismic simulations for three 1D models of Enceladus to compare the effects of ice shell and ocean thickness, as well as core structure and composition, on the waveforms recorded by a single seismometer. The 1D models are constructed using self-consistent modelling techniques to enable direct comparisons between the wavefields of each model. We investigate phases sampling the ice, ocean, and core layers at up to 8 Hz, complementing previous studies focussed on lower-frequency phases concentrated in the ice shell. We conclude that even at low epicentral distances ( 30°) from a source at the south pole, core-transmitted and -reflected phases can likely both be observed, providing constraints on ocean depth and core structure. We further confirm that a high-attenuation scenario for the ice shell does not preclude the generation of seismic signals above mission-candidate instrument sensitivity thresholds, and in fact may serve to remove unwanted signals from seismograms.

AB - Enceladus is an astrobiologically compelling target for scientific study and is predicted to have high seismic activity for its size, particularly at its south pole. We conduct ray-theoretical and full-waveform seismic simulations for three 1D models of Enceladus to compare the effects of ice shell and ocean thickness, as well as core structure and composition, on the waveforms recorded by a single seismometer. The 1D models are constructed using self-consistent modelling techniques to enable direct comparisons between the wavefields of each model. We investigate phases sampling the ice, ocean, and core layers at up to 8 Hz, complementing previous studies focussed on lower-frequency phases concentrated in the ice shell. We conclude that even at low epicentral distances ( 30°) from a source at the south pole, core-transmitted and -reflected phases can likely both be observed, providing constraints on ocean depth and core structure. We further confirm that a high-attenuation scenario for the ice shell does not preclude the generation of seismic signals above mission-candidate instrument sensitivity thresholds, and in fact may serve to remove unwanted signals from seismograms.

U2 - 10.1016/j.icarus.2023.115806

DO - 10.1016/j.icarus.2023.115806

M3 - Article (Academic Journal)

SN - 0019-1035

VL - 408

JO - Icarus

JF - Icarus

M1 - 115806

ER -

Global seismology in the interior of Enceladus

Abstract

Bibliographical note

Access to Document

Handle.net

Fingerprint

Equipment

HPC (High Performance Computing) and HTC (High Throughput Computing) Facilities

Cite this