Detection of Marsquake Nests in InSight Data

The seismometer of the InSight NASA discovery mission recorded more than 1,300 seismic events on Mars, grouped into different families according to their frequency content. Here, we present a method to detect quake nests based on time domain correlation of long‐duration waveforms (520 s). Event doublet candidates are first detected on the 2.4 Hz local resonance, and then validated by simultaneous detections on different components and different frequency bands. We provide a detailed analysis of the impact of noise on these detections. Our method revealed a triplet of very high frequency events (S0334b/S0334c/S0343a). These observations demonstrate that quake nests do occur on Mars, validating an active seismic area at 26° epicentral distance, which is interpreted as Cerberus Fossae, and that both impacts and quakes generate the very high frequency‐type seismic events. These repeating waveforms could be used to test noise removal methods applied to InSight seismic data.