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Repetitive marsquakes in Martian upper mantle
1Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China.
Nature Communications
|March 31, 2022
Summary
Scientists detected 47 new marsquakes using advanced techniques, revealing continuous seismic activity. This suggests active volcanism and a mobile Martian mantle beneath Cerberus Fossae.
Area of Science:
- Planetary Science
- Seismology
- Geophysics
Background:
- Seismic wave analysis is crucial for understanding Mars' interior structure.
- Low signal-to-noise ratio in InSight data complicates marsquake identification.
Purpose of the Study:
- To develop and apply novel methods for detecting previously unidentified marsquakes.
- To investigate the seismic activity and potential geological processes occurring on Mars.
Main Methods:
- Utilized the Matched Filter technique and Benford's Law for event detection.
- Employed nine marsquake templates to identify new seismic events.
Main Results:
- Successfully detected 47 previously undetected marsquakes.
- Over 90% of new events are linked to seismic activity beneath Cerberus Fossae.
- Detected events occurred consistently throughout the Martian day, ruling out tidal influences.
Conclusions:
- The findings indicate continuous seismic activity and potential magma movement beneath Cerberus Fossae.
- Suggests active volcanism and a mobile Martian mantle.
- Highlights Cerberus Fossae as a highly seismically active region on Mars.
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