Keisuke Onodera
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View article: Correction to “New Views of Lunar Seismicity Brought by Analysis of Newly Discovered Moonquakes in Apollo Short-Period Seismic Data”
Correction to “New Views of Lunar Seismicity Brought by Analysis of Newly Discovered Moonquakes in Apollo Short-Period Seismic Data” Open
View article: Elastic Properties of Returned Samples From Asteroid (162173) Ryugu
Elastic Properties of Returned Samples From Asteroid (162173) Ryugu Open
The successful sample return from asteroid (162173) Ryugu by Hayabusa2 has contributed to our understanding of the solar system evolution. Over the course of the initial sample analysis, various measurements were conducted, such as mineral…
View article: European Collaboration for Lunar Investigation with Planetary Seismology and Electromagnetism (ECLIPSE): A European Initiative to Strengthen the International Lunar Seismic Network
European Collaboration for Lunar Investigation with Planetary Seismology and Electromagnetism (ECLIPSE): A European Initiative to Strengthen the International Lunar Seismic Network Open
Introduction:In response to the exploratory call for missions within ESA’s science program, we propose the ECLIPSE mission to deploy a European geophysical station with seismometers and electromagnetic sensors on the lunar surface. Althoug…
View article: Preparing Dragonfly to Titan: Detection of Body Waves to Constrain Ice Shell Thickness
Preparing Dragonfly to Titan: Detection of Body Waves to Constrain Ice Shell Thickness Open
The NASA Dragonfly mission, selected in 2019 as the 4th mission of the New Frontiers mission program, is set to explore Saturn's largest moon, Titan, in the mid-2030s [1]. Titan remains a prime target for astrobiological research due to it…
View article: Investigating the Detectability of Body Wave Phases from Tidal Ice Cracking Events on Titan with the Dragonfly Short-Period Seismometer
Investigating the Detectability of Body Wave Phases from Tidal Ice Cracking Events on Titan with the Dragonfly Short-Period Seismometer Open
View article: Low dispersion spectra of lunar impact flashes
Low dispersion spectra of lunar impact flashes Open
View article: Multi-scale investigation of the InSight landing site, on Mars, using one-station seismology
Multi-scale investigation of the InSight landing site, on Mars, using one-station seismology Open
The internal structure of a planet provides constraints for understanding its evolution and dynamics. In November 2018, the InSight spacecraft landed on Mars and deployed a set of geophysical instruments, including one seismological statio…
View article: Newly Discovered Shallow Moonquakes: General Characteristics and Source Parameters
Newly Discovered Shallow Moonquakes: General Characteristics and Source Parameters Open
Seismic observation is a powerful tool to investigate the Earth’s geological activities and internal structure and has also been applied to the Moon and Mars [e.g., Latham et al., 1969; Banerdt et al., 2020]. For the Moon, a seismic …
View article: Plumes of Water Ice/Gas Mixtures Observed in the Lunar Polar Region
Plumes of Water Ice/Gas Mixtures Observed in the Lunar Polar Region Open
The presence of water condensation in the lunar polar region has been reported. However, the origin and amount of water remain unknown, and information on the migration mechanism of water is key for understanding the delivery of water to t…
View article: Investigating Diurnal and Seasonal Turbulence Variations of the Martian Atmosphere Using a Spectral Approach
Investigating Diurnal and Seasonal Turbulence Variations of the Martian Atmosphere Using a Spectral Approach Open
We use a spectral approach to analyze the pressure and wind data from the InSight mission and investigate the diurnal and seasonal trends. Our analyses show that the daytime pressure and wind spectra have slopes of approximately −1.7 and −…
View article: High frequency moonquake catalog
High frequency moonquake catalog Open
<p><strong>Catalog csv file for the Apollo 14, 15, and 16 stations</strong></p><p><strong>== File names ==</strong></p><ul><li>S14_New_MQ_SP.csv</li><li>S15_New_MQ_SP.…
View article: High frequency moonquake catalog
High frequency moonquake catalog Open
Catalog csv file for the Apollo 14, 15, and 16 stations == File names == S14_New_MQ_SP.csv S15_New_MQ_SP.csv S16_New_MQ_SP.csv == Format == 1st column: Event ID 2nd column: Year 3rd column: Day of Year (DOY) 4th column: Station (14, 15, or…
View article: Description of Martian Convective Vortices Observed by InSight and Implications for Vertical Vortex Structure and Subsurface Physical Properties
Description of Martian Convective Vortices Observed by InSight and Implications for Vertical Vortex Structure and Subsurface Physical Properties Open
Convective vortices (whirlwinds) and dust devils (dust‐loaded vortices) are one of the most common phenomena on Mars. They reflect the local thermodynamical structure of the atmosphere and are the driving force of the dust cycle. Additiona…
View article: Evaluation of S1222a Source Parameters Based on Site Effect Simulation and Implication for the Event Origin
Evaluation of S1222a Source Parameters Based on Site Effect Simulation and Implication for the Event Origin Open
Estimating the rupture process of a quake constrains the tectonic setting of its source region. In terrestrial seismology, the rupture process can be described with a classical ω 2 model. In this study, we focus on one key source parameter…
View article: Seismic Scattering and Absorption Properties of Mars Estimated Through Coda Analysis on a Long‐Period Surface Wave of S1222a Marsquake
Seismic Scattering and Absorption Properties of Mars Estimated Through Coda Analysis on a Long‐Period Surface Wave of S1222a Marsquake Open
On 4 May 2022, the seismometer on Mars observed the largest marsquake (S1222a) during its operation. One of the most specific features of S1222a is the long event duration lasting more than 8 hr, in addition to the clear appearance of body…
View article: InSight's seismic and meteorological data related to the Martian convective vortices
InSight's seismic and meteorological data related to the Martian convective vortices Open
Overview: This repository includes the catalog related to Martian convective vortices observed by NASA's InSight mission. The detailed description is made in the JGR Planet paper entitled "Systematic catalog of Martian con…
View article: InSight's seismic and meteorological data related to the Martian convective vortices
InSight's seismic and meteorological data related to the Martian convective vortices Open
Overview: This repository includes the catalog related to Martian convective vortices observed by NASA's InSight mission. The detailed description is made in the JGR Planet paper entitled "Systematic catalog of Martian con…
View article: InSight's seismic and meteorological data related to the Martian convective vortices
InSight's seismic and meteorological data related to the Martian convective vortices Open
Overview: This repository includes the catalog related to Martian convective vortices observed by NASA's InSight mission. The detailed description is made in the JGR Planet paper entitled "Systematic catalog of Martian con…
View article: InSight's seismic and meteorological data related to the Martian convective vortices
InSight's seismic and meteorological data related to the Martian convective vortices Open
Overview: This repository includes the catalog related to Martian convective vortices observed by NASA's InSight mission. The detailed description is made in the JGR Planet paper entitled "Systematic catalog of Martian con…
View article: Systematic catalog of Martian convective vortices observed by InSight
Systematic catalog of Martian convective vortices observed by InSight Open
Convective vortices (whirlwinds) and dust devils (dust-loaded vortices) are one of the most common phenomena on Mars, observable on a daily basis. They reflect the local thermodynamical structure of the atmosphere and are the driving force…
View article: Elastic Property of Returned Samples From Asteroid (162173) Ryugu
Elastic Property of Returned Samples From Asteroid (162173) Ryugu Open
The elastic property of asteroids is one of the paramount parameters for understanding their physical nature. For example, the rigidity enables us to discuss the asteroid’s shape and surface features such as craters and boulders, leading t…
View article: Sample program for analyzing the InSight seismic data
Sample program for analyzing the InSight seismic data Open
This repository includes a sample code for analyzing InSight seismic data. Analysis_VBB.ipynb: Jupyter notebook-based program, which allows us to (i)download raw seismic data, (ii) perform preprocessing (e.g., detrending, demeaning, pre-fi…
View article: Seismic signal data and X-ray CT image data of Hayabusa2 returned samples
Seismic signal data and X-ray CT image data of Hayabusa2 returned samples Open
Description This repository includes the signal data used to estimate the elastic wave velocity of Hayabusa2 returned samples and CI, C2 (Tarda and Tagish Lake), and CM chondrites. Also, the X-ray CT image data for Ryugu's…
View article: Stratification of Heterogeneity in the Lithosphere of Mars From Envelope Modeling of Event S1222a and Near Impacts: Interpretation and Implications for Very‐High‐Frequency Events
Stratification of Heterogeneity in the Lithosphere of Mars From Envelope Modeling of Event S1222a and Near Impacts: Interpretation and Implications for Very‐High‐Frequency Events Open
We have modeled the high‐frequency seismogram envelopes of the large event S1222a and four recently identified near impacts recorded by the InSight mission by introducing a stratification of velocity and attenuation into a multiple‐scatter…
View article: InSight's seismic and meteorological data related to the Martian convective vortices
InSight's seismic and meteorological data related to the Martian convective vortices Open
Overview: This repository includes the catalog related to Martian convective vortices observed by NASA's InSight mission. The detailed description is made in the JGR Planet paper entitled "Systematic catalog of Martian con…
View article: Newly discovered moonquakes from Apollo short-period seismometer data
Newly discovered moonquakes from Apollo short-period seismometer data Open
The beginning of planetary seismology dates back to the Apollo lunar seismic observations (1969 – 1977), where two types of seismometers were deployed at four places on the nearside of the Moon. The seismic observation package consis…
View article: Seismic scattering and absorption properties of Mars estimated through coda analysis on a long-period surface wave of S1222a marsquake
Seismic scattering and absorption properties of Mars estimated through coda analysis on a long-period surface wave of S1222a marsquake Open
On May 4 2022, the seismometer on Mars observed the largest marsquake (S1222a) during its operation. One of the most specific features of S1222a is the long event duration lasting more than 8 hours from the occurrence, in addition to the c…
View article: Quantitative Evaluation of the Lunar Seismic Scattering and Comparison Between the Earth, Mars, and the Moon
Quantitative Evaluation of the Lunar Seismic Scattering and Comparison Between the Earth, Mars, and the Moon Open
The intense seismic scattering seen in Apollo lunar seismic data is one of the most characteristic features, making the seismic signals much different from those observed on the Earth. The scattering is considered to be attributed to subsu…
View article: Modeling Seismic Recordings of High‐Frequency Guided Infrasound on Mars
Modeling Seismic Recordings of High‐Frequency Guided Infrasound on Mars Open
NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport (InSight) mission records several high‐frequency (>0.5 Hz) dispersive seismic signals on Mars. These signals are due to the acoustic‐to‐seismic coupling o…
View article: Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure
Empirical H/V spectral ratios at the InSight landing site and implications for the martian subsurface structure Open
SUMMARY The horizontal-to-vertical (H/V) spectral ratio inversion is a traditional technique for deriving the local subsurface structure on Earth. We calculated the H/V from the ambient vibrations at different wind levels at the InSight la…