Data from Modelling to resolve whether SEIS has detected the formation of a 1.5m diameter crater

Resource type

Dataset

Creators

Carène Larmat

Keisuke Onodera

Ross Maguire

Philippe Lognonné

Publisher

Institut de Physique du Globe de Paris (IPGP)

Publication Year

2020

Abstract

A new 1.5m diameter crater was discovered on Context camera Images of Mars surface. This crater is relatively close to the NASA InSight lander, at a distance of approximately 40km.

Three seismic events were recorded by SEIS, the seismometer of InSight, between the last image without the crater and the second image with the crater. Seismic analysis and modelling were performed in order to test if any of these events is indeed the record of the formation of the crater.

This dataset contains the supporting modelling of this study. It consists of: (1) the full-waveform modelling at different ranges of an isotropic seismic source with a seismic moment of 1e7 N.m in a smooth model of Mars velocity structure. Three solvers are compared: AxiSEM, OpenSWPC, and SPECFEM3D; The seismic moment rate function used for the AxiSEM modelling is a Gaussian of a period of 1s, and a Küpper wavelet with a period of 1s for OpenSWPC and SPECFEM3D. (2) The upper crust model used for the computation of surface waves group velocity of Figure 3, main text of Daubard et al (2020). The model has the following parameters: Density, vp and vs models used for group velocity computations at depths of 5 meter to 1 km. At depths less than 5 meters, model B9 of Lognonné et al. (2020) is used, while at depths below 1 km, the TAYAK model is used (Smrekar et al., 2019).

Data and Citation

doi:10.18715/jgr_newcratermod_2020