Thermal moonquakes

Duennebier, F. K.; Sutton, George H.

doi:10.1029/jb079i029p04351

Cited by 90 publications

(84 citation statements)

References 10 publications

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“…This interpretation is in line with what was observed during the Apollo era where a large percentage of the seismic events were found to be very small Moon-quakes, termed thermal Moon-quakes, occurring with great regularity [147]. Their activity starts abruptly about 2 days after lunar sunrise and decreases rapidly after sunset.…”

Section: Lunar Subsurface Investigated From Correlation Of Seismic Noisesupporting

confidence: 73%

Mesoscopics of ultrasound and seismic waves: application to passive imaging

Larose

2006

Ann. Phys. Fr.

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This manuscript deals with different aspects of the propagation of acoustic and seismic waves in heterogeneous media, both simply and multiply scattering ones. After a short introduction on conventional imaging techniques, we describe two observations that demonstrate the presence of multiple scattering in seismic records: the equipartition principle, and the coherent backscattering effect (Chap. 2). Multiple scattering is related to the mesoscopic nature of seismic and acoustic waves, and is a strong limitation for conventional techniques like medical or seismic imaging. In the following part of the manuscript (Chaps. 3-5), we present an application of mesoscopic physics to acoustic and seismic waves: the principle of passive imaging. By correlating records of ambient noise or diffuse waves obtained at two passive sensors, it is possible to reconstruct the impulse response of the medium as if a source was placed at one sensor. This provides the opportunity of doing acoustics and seismology without a source. Several aspects of this technique are presented here, starting with theoretical considerations and numerical simulations (Chaps. 3, 4). Then we present experimental applications (Chap. 5) to ultrasound (passive tomography of a layered medium) and to seismic waves (passive imaging of California, and the Moon, with micro-seismic noise).

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Section: Lunar Subsurface Investigated From Correlation Of Seismic Noisesupporting

confidence: 73%

Mesoscopics of ultrasound and seismic waves: application to passive imaging

Larose

2006

Ann. Phys. Fr.

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“…[5] Second, we point out that there is similarity in the behavior of the Rayleigh-wave amplitude and the statistics of thermal moonquakes, reported for the same region [Duennebier, 1976;Duennebier and Sutton, 1974;Cooper and Kovach, 1975;Heiken et al, 1991]. Both show the same diurnal periodicity and peak at sunset.…”

Section: Introductionmentioning

confidence: 69%

The noise cross‐correlation approach for Apollo 17 LSPE data: Diurnal change in seismic parameters in shallow lunar crust

2008

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[1] By applying the noise cross-correlation technique to Apollo 17 Lunar Seismic Profiling Experiment (LSPE) data, we discovered temporal changes in Rayleigh-wave group velocity within a diurnal cycle (29.53 d). Assuming that this phenomenon is caused by density and seismic parameter changes due to temperature, we formulated an inverse problem. Thermal diffusivity serves as the key parameter for this problem because it controls the depth penetration of temperature change. The results of inversion indicate that a typical number for the thermal diffusivity of terrestrial rocks (k % 10 À6 m 2 /s) is too large to fit the data. Our preferred value is about k % 10 À7 (m 2 /s), although the inversion alone cannot discriminate among the values below this number. Differences between this estimate and a lower estimate (k % 10 À8 m 2 /s) by Langseth et al. may indicate the significance of radiation for thermal transfer in the upper-most lunar crust. We also find a direct correlation between the Rayleigh-wave amplitudes and the statistics of thermal moonquakes, both of which change with the diurnal periodicity and peak at sunset. This implies that thermal moonquakes are the source of valuable seismic noise, lending strong support to an idea proposed by Larose et al. This is in contrast to the terrestrial situation where the ocean-generated noise plays a critical role in the cross-correlation approach. The noise correlation approach is potentially useful for many planets which undergo wide swings in surface temperature and thus potentially have thermal quakes.Citation: Tanimoto, T., M. Eitzel, and T. Yano (2008), The noise cross-correlation approach for Apollo 17 LSPE data: Diurnal change in seismic parameters in shallow lunar crust,

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“…This modeling showed that the frequency response of a fractured medium is primarily dependent upon the inherent fracture spacing rather than on the impactor diameter. We therefore chose a fracture structure that produced results consistent with impacts into the upper lunar crust (14,17), which like Eros is highly fractured from long impact exposure (8). The resulting seismograms (Fig.…”

Section: Impact-induced Seismic Activity On Asteroid 433 Eros: a Surfmentioning

confidence: 99%