Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Standard
Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data. / Joshi, Rakshit; Knapmeyer-Endrun, Brigitte; Mosegaard, Klaus; Igel, Heiner; Christensen, Ulrich R.
I: Earth and Space Science, Bind 8, Nr. 10, e2021EA001733, 16.10.2021.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
Harvard
APA
Vancouver
Author
Bibtex
}
RIS
TY - JOUR
T1 - Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data
AU - Joshi, Rakshit
AU - Knapmeyer-Endrun, Brigitte
AU - Mosegaard, Klaus
AU - Igel, Heiner
AU - Christensen, Ulrich R.
PY - 2021/10/16
Y1 - 2021/10/16
N2 - The estimation of crustal structure and thickness is essential in understanding the formation and evolution of terrestrial planets. Initial planetary missions with seismic instrumentation on board face the additional challenge of dealing with seismic activity levels that are only poorly constrained a priori. For example, the lack of plate tectonics on Mars leads to low seismicity, which could, in turn, hinder the application of many terrestrial data analysis techniques. Here we propose using a joint inversion of receiver functions and apparent incidence angles, which contain information on absolute S-wave velocities of the subsurface. Since receiver function inversions suffer from a velocity depth trade-off, we in addition exploit a simple relation that defines apparent S-wave velocity as a function of observed apparent P-wave incidence angles to constrain the parameter space. We then use the Neighborhood Algorithm for the inversion of a suitable joint objective function. The resulting ensemble of models is then used to derive uncertainty estimates for each model parameter. In preparation for the analysis of data from the InSight mission, we show the application of our proposed method on Mars synthetics and sparse terrestrial data sets from different geological settings using both single and multiple events. We use information-theoretic statistical tests as model selection criteria and discuss their relevance and implications in a seismological framework.
AB - The estimation of crustal structure and thickness is essential in understanding the formation and evolution of terrestrial planets. Initial planetary missions with seismic instrumentation on board face the additional challenge of dealing with seismic activity levels that are only poorly constrained a priori. For example, the lack of plate tectonics on Mars leads to low seismicity, which could, in turn, hinder the application of many terrestrial data analysis techniques. Here we propose using a joint inversion of receiver functions and apparent incidence angles, which contain information on absolute S-wave velocities of the subsurface. Since receiver function inversions suffer from a velocity depth trade-off, we in addition exploit a simple relation that defines apparent S-wave velocity as a function of observed apparent P-wave incidence angles to constrain the parameter space. We then use the Neighborhood Algorithm for the inversion of a suitable joint objective function. The resulting ensemble of models is then used to derive uncertainty estimates for each model parameter. In preparation for the analysis of data from the InSight mission, we show the application of our proposed method on Mars synthetics and sparse terrestrial data sets from different geological settings using both single and multiple events. We use information-theoretic statistical tests as model selection criteria and discuss their relevance and implications in a seismological framework.
KW - seismology
KW - receiver functions
KW - planets
KW - crustal thickness
KW - joint inversion
KW - incidence angles
KW - CRUSTAL STRUCTURE
KW - UPPER-MANTLE
KW - MOHO DEPTH
KW - NEIGHBORHOOD ALGORITHM
KW - GEOPHYSICAL INVERSION
KW - STRUCTURE BENEATH
KW - SEISMOGRAMS
KW - WAVES
KW - POLARIZATION
KW - VELOCITIES
U2 - 10.1029/2021EA001733
DO - 10.1029/2021EA001733
M3 - Journal article
VL - 8
JO - Earth and Space Science
JF - Earth and Space Science
SN - 2333-5084
IS - 10
M1 - e2021EA001733
ER -
ID: 284172686