Models of seismic sources

Malytskyy, D.; Parfeniuk, A.; Gnyp, Andriy; Hrytsai, O.; Mykhailova, O.

doi:10.3997/2214-4609.201800081

Cited by 1 publication

(1 citation statement)

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“…As indicated there, modification of the TAYAK velocity model used in the inversion of waveforms and for calculation of seismic tensor is published in Brinkman et al (2021). The source code for the moment tensor inversions and the output seismograms to produce Figures 3 and 4 are made available at Malytskyy (2023). This is InSight contribution 296.…”

Section: Data Availability Statementmentioning

confidence: 99%

High‐ and Low‐Frequency Waveform Analysis the Marsquake of Sol 1222: Focal Mechanism, Centroid Moment Tensor Inversion and Source Time Function

Malytskyy,

Křížová,

Lognonné

et al. 2024

Earth and Space Science

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The seismometer onboard InSight NASA Mars mission discovered a seismically active planet. We focused on the strongest event named S1222a (4 May 2022, Mw ∼ 4.7), which was recorded by the Very Broad Band sensors and associated channel ELYSE and is located 37.2° away from InSight. We use two different methods based on a point source approach for an elastic, horizontally layered medium to retrieve source parameters of S1222a. In the first case, the seismic moment tensor inversion of high‐frequency seismogram data is calculated using a matrix method for the direct waves. The process includes the generation of records in displacement using the frequency‐wavenumber integration technique. A method of inversion of the moment tensor of direct P‐ and S‐waves, less sensitive to path effects than reflected and transformed waves, is presented, which significantly increases the accuracy and reliability of the method. In the second case, tensors were calculated using common low‐frequency full‐waveform inversion and the tests to verify the plausibility of this solution obtained from the single station calculation were performed and the uncertainty estimations for inversions can be useful in future research.

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Section: Data Availability Statementmentioning

confidence: 99%