[P-PS08] 月の科学と探査

[PPS08-06] 月探査ミッションに向けた超小型アクティブ地震探査システムの開発

★招待講演

*辻 健¹、Imam Tarek¹、坂本 和敏¹、Ahmad Ahmad¹、喜岡 新¹、村上 文俊²、塚原 均²、越智 公昭²、阿部 進²、田中 智³、春山 純一³、小野寺 圭祐⁴ (1.東京大学大学院　工学系研究科、2.地球科学総合研究所、3.ISAS/JAXA、4.岡山大学)

キーワード：アクティブ地震探査、小型震源装置、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.