Chandrayaan-3 lander instruments detect 'natural' movement. Details here

livemint.com:

The initial assessment of the first-ever measurements of the near-surface lunar plasma environment over the south pole region by RAMBHA-LP payload onboard Chandrayaan-3 lander indicates that plasma there is relatively sparse, ISRO said on Thursday. Meanwhile, the ILSA payload on Chandrayaan 3 lander to study lunar seismic activity has not only recorded the movements of rover and other payloads, but also has recorded an event, appearing to be a natural one, on August 26. “The source of this event is under investigation," ISRO said.

Also, ISRO said that the instrument for the Lunar Seismic Activity (ILSA) payload on Chandrayaan 3 Lander which is the first Micro Electro Mechanical Systems (MEMS) technology-based instrument on the moon has recorded the movements of Rover and other payloads. Additionally, it has recorded an event, appearing to be a natural one, on August 26, 2023. The source of this event is under investigation.

The Instrument for Lunar Seismic Activity (ILSA) payload on the Chandrayaan 3 Lander is the first instance of a Micro Electro Mechanical Systems (MEMS) technology-based instrument on the moon. It has recorded the vibrations occurring due to the movements of Rover and other payloads. ILSA comprises a cluster of six high-sensitivity accelerometers, which are indigenously fabricated using the Silicon Micromachining process.

The core sensing element consists of a spring-mass system with comb-structured electrodes. External vibrations lead to a deflection of the spring, resulting in a change in capacitance which is converted into voltage. ILSA's primary objective is to measure ground vibrations generated by natural quakes, impacts, and artificial events.