Extensive Secondary Cratering From the InSight Sol 1034a Impact Event

Area of Science:

• Planetary Science
• Impact Cratering Studies
• Seismology

Background:

• Impact cratering is a fundamental process in Solar System history.
• Observing small-scale features like secondary craters is challenging due to image timing gaps.
• Seismic data offers precise timing for impact events.

Purpose of the Study:

• To investigate secondary cratering using a precisely timed seismic event.
• To analyze the characteristics of a new impact crater and its associated secondary events.
• To understand the formation and fading of secondary impact features.

Main Methods:

• Utilized seismic event data (S1034a) from NASA's InSight mission for precise impact timing.
• Analyzed orbital imagery of the new impact crater.
• Quantified secondary impact features (low albedo spots) and their distribution.

Main Results:

• Confirmed seismic event S1034a resulted from a new impact cratering event.
• A ~9m primary crater generated over 900 secondary impact events (low albedo spots) up to 7km away.
• Secondary impact ejecta velocities were estimated below 200 m/s.
• Low albedo spots fade within 200-300 days.

Conclusions:

• Seismic data provides a unique opportunity to study small-scale secondary cratering.
• Low albedo spots are significant indicators of secondary impact processes.
• Secondary impact features on Mars have a relatively short observable lifespan.