Back to Search
Start Over
Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data
- Source :
- Earth and Space Science, Vol 8, Iss 10, Pp n/a-n/a (2021), Joshi, R, Knapmeyer-Endrun, B, Mosegaard, K, Igel, H & Christensen, U R 2021, ' Joint Inversion of Receiver Functions and Apparent Incidence Angles for Sparse Seismic Data ', Earth and Space Science, vol. 8, no. 10, e2021EA001733 . https://doi.org/10.1029/2021EA001733
- Publication Year :
- 2021
- Publisher :
- American Geophysical Union (AGU), 2021.
-
Abstract
- 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.<br />Key Points: We propose the joint inversion of receiver functions and apparent S‐wave velocity curves to estimate crustal thickness. Using the Neighborhood Algorithm, we show how a full uncertainty estimate can be computed from an ensemble solution. The method is applied to Martian synthetics and terrestrial data sets comprising single and multiple events.<br />IMPRS<br />Emeritus group<br />DLR German Space Agency<br />http://www.orfeus-eu.org/data/eida/<br />http://instaseis.ethz.ch/marssynthetics/
- Subjects :
- POLARIZATION
ddc:523
Instrumentation
Astronomy
Computer Science::Neural and Evolutionary Computation
Inversion (geology)
WAVES
QB1-991
joint inversion
Environmental Science (miscellaneous)
seismology
Planetary missions
Physics::Geophysics
planets
Planet
crustal thickness
Joint (geology)
CRUSTAL STRUCTURE
incidence angles
Incidence (geometry)
SEISMOGRAMS
GEOPHYSICAL INVERSION
QE1-996.5
UPPER-MANTLE
Astrophysics::Instrumentation and Methods for Astrophysics
ddc:622.1592
Geology
NEIGHBORHOOD ALGORITHM
receiver functions
Physics::Space Physics
STRUCTURE BENEATH
General Earth and Planetary Sciences
Terrestrial planet
Astrophysics::Earth and Planetary Astrophysics
VELOCITIES
Seismology
MOHO DEPTH
Subjects
Details
- Language :
- English
- ISSN :
- 23335084
- Volume :
- 8
- Issue :
- 10
- Database :
- OpenAIRE
- Journal :
- Earth and Space Science
- Accession number :
- edsair.doi.dedup.....4fd91aeb7eda3c081c02ad0daf342c27