Article
Geosciences, Multidisciplinary
M. A. Ravine, C. J. Hansen, G. C. Collins, P. M. Schenk, M. A. Caplinger, L. Lipkaman Vittling, D. J. Krysak, R. P. Zimdar, J. B. Garvin, S. J. Bolton
Summary: During the Juno Mission's encounter with Ganymede, the JunoCam captured four color images of the moon, providing a detailed view of one-sixth of its surface. These images not only provided higher resolution and better quality compared to previous observations but also allowed the creation of a digital elevation model for a specific area. The geologic map of Ganymede's eastern region was refined using the images from JunoCam.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Geosciences, Multidisciplinary
V Galluzzi, J. S. Oliveira, J. Wright, D. A. Rothery, L. L. Hood
Summary: The crustal magnetic field map of Mercury shows anomalies related to impact craters, possibly due to impactors bringing magnetic carriers to record the planet's magnetic field. Analyzing the anomalies associated with relatively young craters reveals asymmetry with respect to the crater center, correlating well with the location of impact melt and inferred impact direction. This suggests that magnetized material in the impact melt downrange is likely responsible for the detected magnetic anomalies.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geochemistry & Geophysics
Erica Luzzi, Giacomo Nodjoumi, Matteo Massironi, Riccardo Pozzobon, Angelo Pio Rossi
Summary: This study used a semi-automated Python-based script to analyze the parameters related to the growth of Lunar floor-fractured craters, such as displacement, length, and width of the grabens, and the power law relationship between displacement and length. The results showed a sublinear fault growth, potentially caused by mechanical discontinuities and linkage phenomena. The D-max/L ratios were higher than predicted for the Moon and closer to values observed on Earth. The code developed in this study can facilitate future research on lunar faults' growth.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Geosciences, Multidisciplinary
Kelsey Crane, Valentina Galluzzi
Summary: This article discusses the deformation of planetary bodies, pointing out that Earth is the only planetary body in the solar system that is related to plate tectonics, and the deformation mechanisms of other planetary bodies are yet to be studied. The article mentions that technological advancements and the improvement in planetary space mission data provide an opportunity to study planetary surface deformation, while also highlighting the lack of micro-to-local scale information in planetary structural geology studies. Finally, the article suggests that studying old deformed surfaces of Mercury, the Moon, and Mars can deepen our understanding of the early evolution of Earth tectonics.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Astronomy & Astrophysics
Paul M. Schenk, William B. Mckinnon
Summary: A new global topographic map and updated global mosaic of Enceladus show that the shape of this icy ocean world is distorted and exhibits a zonal latitudinal zoning of topography. Basins on this moon are shaped by the characteristics of the terrains they formed in, rather than by local-scale geologic deformation. These basins may be surface manifestations of hydrothermal activity originating from the rocky core of Enceladus.
Article
Geosciences, Multidisciplinary
Erica Luzzi, Angelo Pio Rossi, Matteo Massironi, Riccardo Pozzobon, Giacomo Corti, Daniele Maestrelli
Summary: The study proposes a new formation mechanism for chaotic terrains on Mars and floor-fractured craters on both the Moon and Mars. This mechanism involves cycles of inflation and deflation of a buried magma chamber, rather than the presence of water, leading to a specific type of caldera collapse. Analog experiments show correspondence with natural case studies.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geography, Physical
Eemi Ruuska, Pietari Skytta, Niko Putkinen, Tuire Valjus
Summary: In this study, researchers present a new digital elevation model of the buried bedrock surface in Western Finland, shedding light on how bedrock structures and topography contribute to the deposition of glaciofluvial sediments and groundwater flow pathways. Vertical fracture zones in the bedrock are observed as sharp breaks in the rock surface and have formed interconnected elongate bedrock depressions and rock blocks with different elevations. A narrow trench following fracture zones serves as a major hydraulic connection between two parts of the aquifer, and conductive fracture zones connect the shallow glaciofluvial aquifer system to deep groundwater in the bedrock.
EARTH SURFACE PROCESSES AND LANDFORMS
(2023)
Article
Geography, Physical
Bo Zhao, Yunsheng Wang, Weile Li, Huiyan Lu, Zhengyou Li
Summary: This study evaluates the spatial and size distributions of coseismic landslides triggered by the 2021 Haiti earthquake and their controlling factors. The results show that the landslides were concentrated in the western section of the Tiburon Peninsula, especially within Pic Macaya National Park. The study also found that limestone is the dominant rock in the area and rainfall has a positive relationship with landslide concentration.
Article
Geochemistry & Geophysics
Wei Cao, Zhiyong Xiao, Rui Xu, Yichen Wang
Summary: This study presents a novel method to extract background secondaries and discovers abundant previously unrecognized Orientale background secondaries. It establishes a promising method to detect populations of background secondaries.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Geochemistry & Geophysics
C. Riedel, G. G. Michael, C. Orgel, C. Baum, C. H. van der Bogert, H. Hiesinger
Summary: In this study, impact crater records on planetary surfaces were analyzed for spatial randomness. The research found global clustering of craters on Mercury, largely random distribution of craters on Venus, and more pronounced global clustering of craters on the Moon. The study also highlighted the importance of considering planetary curvature in statistical analyses of impact craters.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2021)
Review
Astronomy & Astrophysics
N. Thomas, H. Hussmann, T. Spohn, L. M. Lara, U. Christensen, M. Affolter, T. Bandy, T. Beck, S. Chakraborty, U. Geissbuehler, M. Gerber, K. Ghose, J. Gouman, S. HosseiniArani, K. Kuske, A. Peteut, D. Piazza, M. Rieder, A. Servonet, C. Althaus, T. Behnke, K. Gwinner, C. Huettig, R. Kallenbach, A. Lichopoj, K. Lingenauber, H. -G. Loetzke, F. Luedicke, H. Michaelis, J. Oberst, R. Schroedter, A. Stark, G. Steinbruegge, S. del Togno, K. Wickhusen, J. M. Castro, M. Herranz, J. Rodrigo, H. Perplies, T. Weigel, S. Schulze-Walewski, S. Blum, A. Casciello, E. Rugi-Grond, W. Coppoolse, M. Rech, K. Weidlich, T. Leikert, R. Henkelmann, B. Trefzger, B. Metz
Summary: The BepiColombo Laser Altimeter (BELA) is the first European laser altimeter designed for interplanetary flight, utilizing a Nd:YAG laser for ranging with high precision expected in optimal conditions.
SPACE SCIENCE REVIEWS
(2021)
Article
Geochemistry & Geophysics
Ariel N. Deutsch, Anthony Colaprete, Jennifer L. Heldmann, Richard C. Elphic, Kevin M. Cannon
Summary: This study analyzes the surface roughness of five north polar craters on Mercury and finds that some craters have a low-reflectance surface associated with water-ice deposits, while others do not. It also identifies areas with subdued roughness that may be related to thick lag deposit margins or enhanced diffusive mixing along deposit edges.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Environmental Sciences
Rei Itsukushima
Summary: This study highlights the importance of understanding the relationship between low-flow conditions and controlling factors in order to establish sustainable water resource management based on future drought risk. The research demonstrates the variation in drought runoff coefficient under different severities of drought and identifies the different controlling factors depending on the magnitude of the drought. Effective water resource management requires consideration of precipitation patterns, geology, land use, and topography when estimating the volume of drought runoff.
Article
Geology
Qingfei Wang, Xuefei Liu, Runsheng Yin, Weijun Weng, Hesen Zhao, Lin Yang, Degao Zhai, Dapeng Li, Yao Ma, David I. Groves, Jun Deng
Summary: This study investigates the mercury isotope ratios of gold-related sulfides and mafic dikes from four orogenic gold provinces on the margins of the North China Craton and Yangtze Craton, revealing the presence of three different orogenic gold deposit (OGD) groups. The analysis indicates that the subduction histories play a major role in determining the sources of the OGDs.
Article
Geosciences, Multidisciplinary
Kelsey Crane, Allison Bohanon
Summary: On the surface of Mercury, thrust fault-related landforms, smooth plains units, and impact craters have been observed. These features suggest different geological processes of global cooling, effusive volcanism, and impact events. By utilizing frictional faulting theory and Earth analogue work, researchers were able to reconcile the contradicting stress regimes implied by different phenomena on Mercury.
FRONTIERS IN EARTH SCIENCE
(2021)
Article
Geosciences, Multidisciplinary
Sashank Vanga, Caleb Fassett, Michael Zanetti, Cole Nypaver, Bradley J. Thomson, Masatoshi Hirabayashi
Summary: This study analyzed rock abundance data on the lunar surface and found that the growth of lunar regolith affects the abundance of surface rocks, indicating that older surfaces have lower rock abundance, and younger surfaces have higher rock abundance. In addition, rocks reexcavated from within the regolith contribute significantly to the observed rock population on the lunar surface.
GEOPHYSICAL RESEARCH LETTERS
(2022)
Article
Astronomy & Astrophysics
Alex J. Meyer, Daniel J. Scheeres, Harrison F. Agrusa, Guillaume Noiset, Jay McMahon, Ozgur Karatekin, Masatoshi Hirabayashi, Ryota Nakano
Summary: Synchronous binary asteroids can experience libration, resulting in energy dissipation. Our numerical model explores how system configurations affect the rate of energy dissipation. Tumbling within the synchronous state eliminates short timescale trend, but not over long timescales. Damping is dependent on the stiffness of the secondary, while the semimajor axis expansion rate is dictated by the stiffness of the primary.
Article
Astronomy & Astrophysics
M. Hirabayashi
Summary: Currently, the dynamics of self-gravitating planetary bodies are often treated using rigid-body assumption or simplified force models and shapes, which neglect the response of deformation to translation and rotation, limiting its applicability. This study proposes a theoretical framework for characterizing the dynamics of a deforming body and demonstrates its application in continuum mechanics modeling.
Article
Astronomy & Astrophysics
Yaeji Kim, Joseph DeMartini, Derek C. Richardson, Masatoshi Hirabayashi
Summary: In this study, we numerically investigate the tidal resurfacing phenomenon on Apophis during its close approach with Earth in 2029. By implementing a two-stage tidal resurfacing model, we predict the surface slope profiles and grain motions during the closest encounter and statistically extrapolate the expected resurfaced area. Our simulation results indicate that tidal resurfacing will occur half an hour before perigee and cover approximately 1% of Apophis's surface. We identify the most likely locations to detect tidal resurfacing based on the surface slope profiles and encounter orientation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Geochemistry & Geophysics
Timothy A. Goudge, Caleb I. Fassett, Marianne Coholich, Emily R. Bamber
Summary: More than 250 hydrologically open paleolakes on Mars have been discovered, which were filled with water before catastrophic breaching occurred. Observational results and numerical modeling experiments indicate that steeper slopes and taller crater rims are key factors in promoting more complete draining of these open-basin lakes on Mars.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Engineering, Aerospace
M. Hirabayashi, C. M. Hartzell, P. M. Bellan, D. Bodewits, G. L. Delzanno, T. W. Hyde, U. Konopka, E. Thomas, H. M. Thomas, I. Hahn, U. E. Israelsson
Summary: Dust accumulation is a critical issue in lunar explorations. A team has been organized to define key science questions and assess dust remediation techniques. Three electrostatic remediation technology concepts have been investigated, and further development is needed.
Article
Multidisciplinary Sciences
Jian-Yang Li, Masatoshi Hirabayashi, Tony L. Farnham, Jessica M. Sunshine, Matthew M. Knight, Gonzalo Tancredi, Fernando Moreno, Brian Murphy, Cyrielle Opitom, Steve Chesley, Daniel J. Scheeres, Cristina A. Thomas, Eugene G. Fahnestock, Andrew F. Cheng, Linda Dressel, Carolyn M. Ernst, Fabio Ferrari, Alan Fitzsimmons, Simone Ieva, Stavro L. Ivanovski, Theodore Kareta, Ludmilla Kolokolova, Tim Lister, Sabina D. Raducan, Andrew S. Rivkin, Alessandro Rossi, Stefania Soldini, Angela M. Stickle, Alison Vick, Jean-Baptiste Vincent, Harold A. Weaver, Stefano Bagnulo, Michele T. Bannister, Saverio Cambioni, Adriano Campo Bagatin, Nancy L. Chabot, Gabriele Cremonese, R. Terik Daly, Elisabetta Dotto, David A. Glenar, Mikael Granvik, Pedro H. Hasselmann, Isabel Herreros, Seth Jacobson, Martin Jutzi, Tomas Kohout, Fiorangela La Forgia, Monica Lazzarin, Zhong-Yi Lin, Ramin Lolachi, Alice Lucchetti, Rahil Makadia, Elena Mazzotta Epifani, Patrick Michel, Alessandra Migliorini, Nicholas A. Moskovitz, Jens Ormo, Maurizio Pajola, Paul Sanchez, Stephen R. Schwartz, Colin Snodgrass, Jordan Steckloff, Timothy J. Stubbs, Josep M. Trigo-Rodriguez
Summary: This study used the Hubble Space Telescope to observe the evolution of the DART impact ejecta from 15 minutes to 18.5 days, revealing that the ejecta initially are dominated by gravitational interaction and later driven by solar radiation pressure, forming a sustained tail consistent with previously observed asteroid tails. This provides a framework for understanding the fundamental mechanisms of asteroids disrupted by impacts.
Article
Geochemistry & Geophysics
P. E. Montalvo, H. Christopher, M. Hirabayashi, C. Fassett, D. T. King Jr
Summary: We estimated the ejecta thickness of five complex craters on Ceres' equatorial region by analyzing smaller, simple craters in their ejecta deposits. The ejecta thickness ranges from 3 to 73 m around complex craters and 96-223 m at their rim crest localities. The thinner ejecta thicknesses on Ceres compared to the Moon are likely due to the presence of meltwater, which is supported by previous studies on subsurface water ice melting.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Editorial Material
Geochemistry & Geophysics
Laurent G. J. Montesi, Anni Maeaettaenen, A. Deanne Rogers, Bradley J. Thomson
Summary: Peer review is crucial for ensuring the publication of articles in scientific journals, such as JGR: Planets, that are based on sound scientific principles and cutting-edge techniques and present significant discoveries or new understandings of planetary processes. The journal covers a wide range of geoscience topics, with the only requirement being their relevance to planetary processes. The editorial board and guest editors rely on the expertise of the scientific community to evaluate and improve manuscripts, and they express their deep gratitude to the many scientists who volunteer their time and energy for peer review.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2023)
Article
Astronomy & Astrophysics
Ryota Nakano, Masatoshi Hirabayashi
Summary: We have developed a new thermophysical model that can accurately simulate the thermal conditions of small celestial bodies, such as asteroids and comet nuclei, and also consider local topographic features. The model considers heat conduction between neighboring elements and includes factors such as scattering sunlight, self-heating, and shadows. We validated the model and compared it with previous works and observational data of asteroid (101955) Bennu.
Article
Multidisciplinary Sciences
J. L. Dickson, A. M. Palumbo, J. W. Head, L. Kerber, C. I. Fassett, M. A. Kreslavsky
Summary: Gullies on Mars are similar to water-carved channels on Earth, but they are mostly found at elevations where liquid water is not expected under the current climate conditions. Previous studies have suggested that the sublimation of carbon dioxide ice alone could form Martian gullies. However, using a general circulation model, this study suggests that the highest-elevation Martian gullies coincide with a boundary where pressures above the triple point of water have occurred when Mars' rotational axis tilt reached 35 degrees. These conditions have happened repeatedly over the past several million years, with the most recent occurrence being about 630,000 years ago. Therefore, the researchers propose a dual gully formation scenario that involves the melting of water ice followed by the sublimation of carbon dioxide ice.
Article
Astronomy & Astrophysics
Derek C. Richardson, Harrison F. Agrusa, Brent Barbee, William F. Bottke, Andrew F. Cheng, Siegfried Eggl, Fabio Ferrari, Masatoshi Hirabayashi, Ozgur Karatekin, Jay McMahon, Stephen R. Schwartz, Ronald-Louis Ballouz, Adriano Campo Bagatin, Elisabetta Dotto, Eugene G. Fahnestock, Oscar Fuentes-Munoz, Ioannis Gkolias, Douglas P. Hamilton, Seth A. Jacobson, Martin Jutzi, Josh Lyzhoft, Rahil Makadia, Alex J. Meyer, Patrick Michel, Ryota Nakano, Guillaume Noiset, Sabina D. Raducan, Nicolas Rambaux, Alessandro Rossi, Paul Sanchez, Daniel J. Scheeres, Stefania Soldini, Angela M. Stickle, Paolo Tanga, Kleomenis Tsiganis, Yun Zhang
Summary: NASA's DART spacecraft is planned to impact the natural satellite of Didymos to test kinetic impactor technology and measure momentum transfer enhancement factor beta. Earth-based observations, LICIACube spacecraft, and ESA's Hera mission will provide additional observations and characterizations. After the impact, the dynamical state of the system will change, including a reduction in orbital period, an orbital tilt, enhanced libration of Dimorphos, and possible moon rotation.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
M. Pajola, O. S. Barnouin, A. Lucchetti, M. Hirabayashi, R. -L. Ballouz, E. Asphaug, C. M. Ernst, V. Della Corte, T. Farnham, G. Poggiali, J. M. Sunshine, E. Mazzotta Epifani, N. Murdoch, S. Ieva, S. R. Schwartz, S. Ivanovski, J. M. Trigo-Rodriguez, A. Rossi, N. L. Chabot, A. Zinzi, A. Rivkin, J. R. Brucato, P. Michel, G. Cremonese, E. Dotto, M. Amoroso, I. Bertini, A. Capannolo, A. Cheng, B. Cotugno, M. Dall'Ora, R. T. Daly, V. Di Tana, J. D. P. Deshapriya, I. Gai, P. H. A. Hasselmann, G. Impresario, M. Lavagna, A. Meneghin, F. Miglioretti, D. Modenini, P. Palumbo, D. Perna, S. Pirrotta, E. Simioni, S. Simonetti, P. Tortora, M. Zannoni, G. Zanotti
Summary: This research discusses the impact of the DART spacecraft on the Dimorphos satellite of the Didymos system and explores the observation and mapping strategies. By studying geological features and processes on other NEAs, the impact conditions that DART might encounter on Dimorphos are assessed.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
Masatoshi Hirabayashi, Fabio Ferrari, Martin Jutzi, Ryota Nakano, Sabina D. Raducan, Paul Sanchez, Stefania Soldini, Yun Zhang, Olivier S. Barnouin, Derek C. Richardson, Patrick Michel, Elisabetta Dotto, Alessandro Rossi, Andrew R. Rivkin
Summary: NASA's DART mission aims to change the orbit and shape of the binary asteroid Didymos by impacting its smaller component Dimorphos. While there are uncertainties, significant changes on Didymos and Dimorphos are possible under certain conditions. Earth-based observations can measure the resulting orbit perturbation and shape changes.
PLANETARY SCIENCE JOURNAL
(2022)