Abstract: We know far less about Mars’ tectonics than we do about Earth’s. On Earth, the majority of earthquakes are generated by interactions between moving tectonic plates. Mars, however, does not have moving tectonic plates. Data from the Seismic Experiment for Interior Structure (SEIS) on NASA’s InSight mission has revealed that quakes do occur on Mars, now known as marsquakes. These marsquakes provide a unique window into the properties and behavior of the planet’s lithosphere and internal processes. In this work, we analyze low-frequency marsquakes recorded by SEIS to better understand their origins. By applying a sequence of coordinate rotations to the raw seismic data, we isolate and measure the amplitudes of the primary seismic phases: P-, SH-, and SV- waves. Comparing the relative amplitudes of these phases allows us to infer the underlying faulting mechanisms responsible for the seismic activity. Faulting mechanisms were estimated for N of M recorded low-frequency marsquakes. The mechanisms suggest that the area is very volcanically active.
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