TY - JOUR
T1 - Reflection imaging of the Moon's interior using deep-moonquake seismic interferometry
AU - Nishitsuji, Yohei
AU - Rowe, CA
AU - Wapenaar, Kees
AU - Draganov, Deyan
PY - 2016/4/9
Y1 - 2016/4/9
N2 - The internal structure of the Moon has been investigated over many years using a variety of seismic methods, such as travel time analysis, receiver functions, and tomography. Here we propose to apply body-wave seismic interferometry to deep moonquakes in order to retrieve zero-offset reflection responses (and thus images) beneath the Apollo stations on the nearside of the Moon from virtual sources colocated with the stations. This method is called deep-moonquake seismic interferometry (DMSI). Our results show a laterally coherent acoustic boundary around 50 km depth beneath all four Apollo stations. We interpret this boundary as the lunar seismic Moho. This depth agrees with Japan Aerospace Exploration Agency's (JAXA) SELenological and Engineering Explorer (SELENE) result and previous travel time analysis at the Apollo 12/14 sites. The deeper part of the image we obtain from DMSI shows laterally incoherent structures. Such lateral inhomogeneity we interpret as representing a zone characterized by strong scattering and constant apparent seismic velocity at our resolution scale (0.2–2.0 Hz).
AB - The internal structure of the Moon has been investigated over many years using a variety of seismic methods, such as travel time analysis, receiver functions, and tomography. Here we propose to apply body-wave seismic interferometry to deep moonquakes in order to retrieve zero-offset reflection responses (and thus images) beneath the Apollo stations on the nearside of the Moon from virtual sources colocated with the stations. This method is called deep-moonquake seismic interferometry (DMSI). Our results show a laterally coherent acoustic boundary around 50 km depth beneath all four Apollo stations. We interpret this boundary as the lunar seismic Moho. This depth agrees with Japan Aerospace Exploration Agency's (JAXA) SELenological and Engineering Explorer (SELENE) result and previous travel time analysis at the Apollo 12/14 sites. The deeper part of the image we obtain from DMSI shows laterally incoherent structures. Such lateral inhomogeneity we interpret as representing a zone characterized by strong scattering and constant apparent seismic velocity at our resolution scale (0.2–2.0 Hz).
UR - http://agupubs.onlinelibrary.wiley.com/hub/article/10.1002/2015JE004975/editor-highlight/
UR - http://resolver.tudelft.nl/uuid:18cd9b28-07ea-4151-9952-81aca9f8d65f
U2 - 10.1002/2015JE004975
DO - 10.1002/2015JE004975
M3 - Article
SN - 2169-9097
VL - 121
SP - 695
EP - 713
JO - Journal of Geophysical Research Planets
JF - Journal of Geophysical Research Planets
IS - 4
ER -