[P-PS08] Lunar Science and Exploration

[PPS08-06] Development of an Ultra-Compact Active Seismic System for Subsurface Exploration in future lunar missions

★Invited Papers

*Takeshi Tsuji¹, Tarek Imam¹, Kazutoshi Sakamoto¹, Ahmad Bahaa Ahmad¹, Arata Kioka¹, Fumitoshi Murakami², Hitoshi Tsukahara², Kimiaki Ochi², Susumu Abe², Satoshi Tanaka³, Junichi Haruyama³, Keisuke Onodera⁴ (1.School of Engineering, the University of Tokyo, 2.JGI, 3.ISAS/JAXA, 4.Okayama University)

Keywords:Active Seismic Survey, Portable Active Seismic Source, Artemis

We are developing a system for active seismic exploration using a single ultra-compact seismic source and a single seismometer. Although the seismic source developed in this study is small, it continuously generates signals that are stacked to enhance transmission over long distances. By mounting the seismic source and seismometer on a rover and a lander, we can map the three-dimensional geological structure (S-wave velocity) down to a depth of 10 meters using surface wave analysis. Our field experiment at Mt. Fuji demonstrated that a S-wave velocity model can be estimated using this source-receiver system. Furthermore, by equipping two rovers with both a seismic source and a seismometer, we aim to develop an autonomous seismic exploration system capable of investigating depths of several hundred meters through reflection and refraction seismic methods. These surveys, utilizing longer-offset data, will enable deeper subsurface exploration in extraterrestrial environments such as the Moon, Mars, and other solid planetary bodies. Additionally, we have further developed a compact seismic source that can be carried by astronauts. In this presentation, we will introduce our efforts in active seismic surveys (e.g., design of seismic source, and data processing scheme) for future lunar missions.