Phys.org's April 23, 2022 Two largest marsquakes to date recorded from planet's far side links to The Far Side of Mars: Two Distant Marsquakes Detected by InSight which contains the image below.
Answers to How are marsquake epicenters determined using only one seismometer? tell us that the presence of both s and p waves and their different propagation speeds helps.
But in the case of these to well publicized and studied events I'd like to ask more specifically:
Question: How well can they localize the sources of these marsquakes using only a single seismometer? Does being in the shadow zone of the core help or hinder?
Figure 1. Summary of Martian interior models from Stähler et al. (2021) and ray paths for seismic phases from events presented in this article. (a) The travel time curves are computed using the TauP package (Crotwell et al., 1999) for a source depth of 50 km. The phase picks that the Marsquake Service (MQS) identified for these events are indicated with crosses, with varying symbol sizes to schematically reflect the pick uncertainties. The distant events are S1000a and S0976a. For comparison, also shown is S0173a, an event at 30° that locates at Cerberus Fossae. For all three events, high-amplitude phase arrivals have been identified as direct P/S for S0173a and single free-surface reflections PP/SS for S1000a and S0976a. For S1000a, a weak Pdiff phase that is diffracted along the core–mantle boundary is also identified. The vertical dashed lines and gray shaded bars mark the event distances and uncertainties from Table S1, respectively. (b) The structural models are not constrained by observations for depths below ∼800 km for P waves (hatched region; Khan et al., 2021), hence the Pdiff travel times are purely from model predictions. (c) Illustrates the ray paths of the identified phases using a Mars model with a core radius of 1855 km.
Related and potentially helpful in Earth Science SE:
and in Space Exploration SE:
- Just how sensitive is the Insight seismometer?
- What is VBB recentering (InSight lander's Very Broad Band seismic pendulums)?
- How are the most sensitive seismometers on Mars protected from the most powerful jackhammer on Mars just a few feet away?
- What are InSight's barometric and seismic digitization rates and frequency responses when it "listens to the wind"?
- Plot of the thermally-induced tilt in Martian surface during solar eclipse by Phobos? (slope of 1 atom per meter?)
- Has Mars quaked yet? Any scientific speculation when it might?
- How was InSight's vertical seismometer (accelerometer) tested in Earth's stronger gravity?