Abstract
AbstractTo date, three Mars landers carried seismometers: Viking 1 and 2 in 1976 (Viking 1 seismometer failed) and InSight in 2018. In 574 Sols (one Sol is one solar day on Mars), Viking detected one possible marsquake on Sol 80 and one discounted marsquake on Sol 53. Both events were recorded in Event Mode, a two‐channel (amplitude and frequency at 1 Hz) compression technique. In contrast, in 1440 Sols, InSight confirmed 1319 full waveform marsquakes. InSight's technology and capability were significantly better than Viking's, with wind and lander noise being significant for both missions. This project developed three evaluation tools: (a) Comparison and re‐evaluation of Viking Sol 80 and 53 with Viking wind data, (b) a recovered Viking tool to convert InSight waveforms to the Viking compressed Event Mode format, and (c) a new analysis tool to convert Viking compressed Event Mode approximate “reconstruction” to time series similar to InSight format. Evaluation using these tools allows answering the question “What would the Viking Seismology Team has concluded given the new information from InSight and the evaluation tools developed for this project?” Findings from these analyses confirm that both Viking Sol 80 and Sol 53 were marsquakes. The plausible conclusion that Sol 80 was a marsquake also provides potential information for estimating the crustal thickness in Utopia Planitia. Combining data and analysis from only two Mars landers containing working seismometers, landing 42 years apart, is planetary seismic archaeology.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.