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Journal articles on the topic 'Gravity changes'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Chan, Wilson. "Changes in Gravity Value and Anti-Gravity Application." British Journal of Physics Studies 1, no. 1 (2022): 20–26. http://dx.doi.org/10.32996/bjps.2022.1.1.4.

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Gravity is a phenomenon that has been part of the universe since its creation. This phenomenon is when an object pulls everything around it toward the center of the object. Gravity itself was discovered by Sir Isaac Newton in the 17th century. Humans think that there is no such thing as anti-gravity. This research aims to prove that the value of a planet's gravity can change under certain conditions. In addition, this research also aims to prove that humans can create something that causes all objects in a particular area to have a value close to anti-gravity. In short, 3 influences can change

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2

Zhang, Min, Ziwei Liu, Qiong Wu, et al. "Hydrologic changes of in-situ gravimetry." GEOPHYSICS 87, no. 2 (2022): B117—B127. http://dx.doi.org/10.1190/geo2021-0037.1.

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Inter-seasonal and geodynamics-related gravity changes are important geoscientific signals that are extractable from gravimeter observations after removing background information as local hydrology gravity effect. With two superconducting gravimeters (SGs: OSG-053 and iGrav-007) located in different tectonic units, continuous global navigation satellite system data and absolute gravity observations, Wuhan, China, is an ideal location for investigating the effects of gravity resulting from significant local hydrology mass variations. We have processed approximately 26 months of gravity data col

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3

Huang, Jian-Liang, Hui Li, and Rui-Hao Li. "Gravity and gravity gradient changes caused by a point dislocation." Acta Seismologica Sinica 8, no. 1 (1995): 89–99. http://dx.doi.org/10.1007/bf02651001.

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4

Radugina, E. A., and E. N. Grigoryan. "Morphogenetic changes during newt tail regeneration under changed gravity conditions." Biology Bulletin 39, no. 5 (2012): 402–8. http://dx.doi.org/10.1134/s1062359012040103.

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5

Hui, Li, Shen Chongyang, Sun Shaoan, Wang Xiaoquan, Xiang Aimin, and Liu Shaoming. "Recent gravity changes in China Mainland." Geodesy and Geodynamics 2, no. 1 (2011): 1–12. http://dx.doi.org/10.3724/sp.j.1246.2011.00001.

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6

Eggers, A. A. "Residual gravity changes and eruption magnitudes." Journal of Volcanology and Geothermal Research 33, no. 1-3 (1987): 201–16. http://dx.doi.org/10.1016/0377-0273(87)90062-x.

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7

Tempone, Pamela, Martin Landrø, and Erling Fjær. "4D gravity response of compacting reservoirs: Analytical approach." GEOPHYSICS 77, no. 3 (2012): G45—G54. http://dx.doi.org/10.1190/geo2010-0361.1.

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Time-lapse gravity is a technique sensitive to subsurface change in mass and in mass distribution. We attempted to devise a method to predict gravity effects caused by redistribution of subsurface mass induced by reservoir compaction. First, displacements and strains due to compaction were modeled using a geomechanical model. Then, 4D gravity effects were derived from the displacements and the volumetric strains computed in and around the reservoir. A sensitivity study was carried out for geomechanical parameters, such as Poisson’s ratio, as well as for geometrical parameters, such as reservoi

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8

Xu, Xinyu, Hao Ding, Yongqi Zhao, Jin Li, and Minzhang Hu. "GOCE-Derived Coseismic Gravity Gradient Changes Caused by the 2011 Tohoku-Oki Earthquake." Remote Sensing 11, no. 11 (2019): 1295. http://dx.doi.org/10.3390/rs11111295.

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In contrast to most of the coseismic gravity change studies, which are generally based on data from the Gravity field Recovery and Climate Experiment (GRACE) satellite mission, we use observations from the Gravity field and steady-state Ocean Circulation Explorer (GOCE) Satellite Gravity Gradient (SGG) mission to estimate the coseismic gravity and gravity gradient changes caused by the 2011 Tohoku-Oki Mw 9.0 earthquake. We first construct two global gravity field models up to degree and order 220, before and after the earthquake, based on the least-squares method, with a bandpass Auto Regressi

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9

Allis, Richard G., and Trevor M. Hunt. "Analysis of exploitation‐induced gravity changes at Wairakei Geothermal Field." GEOPHYSICS 51, no. 8 (1986): 1647–60. http://dx.doi.org/10.1190/1.1442214.

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Gravity changes (corrected for subsidence) of up to -1 000 (±300) μGal have occurred in the [Formula: see text] area of the production bore field at Wairakei, and smaller decreases extend over a [Formula: see text] surrounding area. The largest part of these decreases occurred during the 1960s; since then the net gravity change for the whole field has been zero, indicating mass flow equilibrium. The principal causes of gravity change have been deep liquid pressure drawdown which resulted in formation of a steam zone, subsequent saturation changes in the steam zone, liquid temperature decline,

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10

Setiawan, Ari, Immanatul Huda, and Richard Lewerissa. "ANALYSIS OF GRAVITY ON ALTITUDE CHANGES IN GRAVITY MICRO DATA USING POLYNOMIAL EQUATION APPROACH (CASE STUDIES OF MERAPI AND KELUD VOLCANOES)." Jurnal Teknologi 85, no. 3 (2023): 97–104. http://dx.doi.org/10.11113/jurnalteknologi.v85.19488.

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Analysis of gravity changes to altitude changes from gravity measurements at Merapi Volcano and Kelud Volcano was carried out to determine the characteristics of the two mountains based on the gravity method. Merapi Volcano and Kelud Volcano are two very active mountains in Indonesia and have different physiography, especially at the top of Kelud there is a crater filled with water. Repeated gravity surveys will be useful for studying deformation in volcanoes and providing information about changes in subsurface mass. The gravity data on Merapi Volcano is secondary data from BPPTKG (Research a

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11

Qu, Wei, Yaxi Han, Zhong Lu, Dongdong An, Qin Zhang, and Yuan Gao. "Co-Seismic and Post-Seismic Temporal and Spatial Gravity Changes of the 2010 Mw 8.8 Maule Chile Earthquake Observed by GRACE and GRACE Follow-on." Remote Sensing 12, no. 17 (2020): 2768. http://dx.doi.org/10.3390/rs12172768.

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The Gravity Recovery and Climate Experiment (GRACE) and GRACE Follow-on (GRACE-FO) satellites are important for studying regional gravitational field changes caused by strong earthquakes. In this study, we chose Chile, one of Earth’s most active seismic zones to explore the co-seismic and post-seismic gravitational field changes of the 2010 Mw 8.8 Maule earthquake based on longer-term GRACE and the newest GRACE-FO data. We calculated the first-order co-seismic gravity gradient changes (GGCs) and probed the geodynamic characteristics of the earthquake. The earthquake caused significant positive

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12

Zou, Zhengbo, Hui Li, Zhicai Luo, and Lelin Xing. "Seasonal gravity changes estimated from GRACE data." Geodesy and Geodynamics 1, no. 1 (2010): 57–63. http://dx.doi.org/10.3724/sp.j.1246.2010.00057.

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13

Rina, D. I., and M. N. Irham. "Merapi observed gravity anomaly changes in 2019." Journal of Physics: Conference Series 1524 (April 2020): 012006. http://dx.doi.org/10.1088/1742-6596/1524/1/012006.

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14

Wong, T. f., and J. B. Walsh. "Deformation-induced gravity changes in volcanic regions." Geophysical Journal International 106, no. 3 (1991): 513–20. http://dx.doi.org/10.1111/j.1365-246x.1991.tb06325.x.

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15

Hinderer, Jacques, Hilaire Legros, and David Crossley. "Global Earth dynamics and induced gravity changes." Journal of Geophysical Research: Solid Earth 96, B12 (1991): 20257–65. http://dx.doi.org/10.1029/91jb00423.

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16

Goldermann, Markus, and Wolfgang Hanke. "Ion channel are sensitive to gravity changes." Microgravity Science and Technology 13, no. 1 (2001): 35–38. http://dx.doi.org/10.1007/bf02873330.

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17

Liu, Han-Li. "Temperature changes due to gravity wave saturation." Journal of Geophysical Research: Atmospheres 105, no. D10 (2000): 12329–36. http://dx.doi.org/10.1029/2000jd900054.

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18

Rymer, Hazel, and Eysteinn Tryggvason. "Gravity and elevation changes at Askja, Iceland." Bulletin of Volcanology 55, no. 5 (1993): 362–71. http://dx.doi.org/10.1007/bf00301147.

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19

McCubbine, J. C., V. Stagpoole, F. Caratori Tontini, et al. "Evaluating temporal stability of the New Zealand quasigeoid following the 2016 Kaikōura earthquake using satellite radar remote sensing." Geophysical Journal International 220, no. 3 (2019): 1917–27. http://dx.doi.org/10.1093/gji/ggz536.

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SUMMARY Quasigeoid models can be determined from surface gravity anomalies, so are sensitive to changes in the shape of the topography as well as changes in gravity. Here we present results of forward modelling gravity/quasigeoid changes from synthetic aperture radar data following the 2016 Mw 7.8 Kaikōura earthquake with land uplift of up to 10 m. We assess the impact of the topographic deformation on the reference surface of the New Zealand vertical datum in lieu of costly field gravity field measurements. The most significant modelled gravity and quasigeoid changes are—2.9 mGal and 5–7 mm,

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20

Breili, Kristian, and Cecilie Rolstad. "Ground-based gravimetry for measuring small spatial-scale mass changes on glaciers." Annals of Glaciology 50, no. 50 (2009): 141–47. http://dx.doi.org/10.3189/172756409787769717.

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AbstractGravity change on a glacier surface is a composite of several effects (e.g. melting and accumulation of snow and ice, redistribution of mass with depth by refreezing of meltwater and height and thickness changes of the snow and ice layers). Models and equations necessary to estimate the measured gravity change due to different effects are presented, and the propagation of observational errors is evaluated. The paper presents experiences with ground-based gravity measurements carried out on Hardangerjøkulen, Norway, in spring and autumn 2007. It was found that the vertical gradient of g

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21

Liu, Dong, Jiancheng Li, Zhe Ni, Yufei Zhao, Qiuyue Zheng, and Bin Du. "Correlation of Gravity and Magnetic Field Changes Preceding Strong Earthquakes in Yunnan Province." Applied Sciences 12, no. 5 (2022): 2658. http://dx.doi.org/10.3390/app12052658.

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The annual variation trend of the gravity and lithospheric magnetic field for adjacent periods are analyzed by using the observation of rover gravity and geomagnetic fields in Yunnan from 2011 to 2021, which tend to be consistent every year during the seismogenic process of a strong earthquake. Thus, this study normalizes the annual value of the adjacent periods for the gravity and lithospheric magnetic field. The normalized values are converted into two classifications that can be compared within [−1,1]. In Yunnan Province, a grid of 0.1° × 0.1° was used to compare the data correlation betwee

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22

Antonov, YU V. "ABNORMAL CHANGES OF THE NON-TIDAL VARIATIONS OF GRAVITY." Proceedings of higher educational establishments. Geology and Exploration, no. 2 (April 28, 2017): 70–76. http://dx.doi.org/10.32454/0016-7762-2017-2-70-76.

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Non-tidal variations of gravity are the residual part of the monitoring of the variations after subtraction from them the lunar-solar gravity variations and the drift of the zero point of the gravimeter. Non-tidal variations are sometimes of complex morphology and structure. The sources of the non-tidal variations are the intracrustal processes and flows of the charged particles in space. The streams of the charged particles can affect the sensor of the gravimeter. The streams of the charged particles can create a powerful magnetic hydrodynamic (MHD) shocks that cause abnormal changes of gravi

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23

Yang, Jinling, Shi Chen, Bei Zhang, Jiancang Zhuang, Linhai Wang, and Hongyan Lu. "Gravity Observations and Apparent Density Changes before the 2017 Jiuzhaigou Ms7.0 Earthquake and Their Precursory Significance." Entropy 23, no. 12 (2021): 1687. http://dx.doi.org/10.3390/e23121687.

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An Ms7.0 earthquake struck Jiuzhaigou (China) on 8 August 2017. The epicenter was in the eastern margin of the Tibetan Plateau, an area covered by a dense time-varying gravity observation network. Data from seven repeated high-precision hybrid gravity surveys (2014–2017) allowed the microGal-level time-varying gravity signal to be obtained at a resolution better than 75 km using the modified Bayesian gravity adjustment method. The “equivalent source” model inversion method in spherical coordinates was adopted to obtain the near-crust apparent density variations before the earthquake. A major g

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BHASKARAN, SANTOSH, SAGAR S. JAGTAP, and PANDIT B. VIDYASAGAR. "LIFE AND GRAVITY." Biophysical Reviews and Letters 04, no. 04 (2009): 299–318. http://dx.doi.org/10.1142/s179304800900106x.

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All organisms on earth have evolved at unit gravity and thus are probably adapted to function optimally at 1 g. However, with the advent of space exploration, it has been shown that organisms are capable of surviving at much less than 1 g, as well as at greater than 1 g. Organisms subjected to increased g levels exhibit alterations in physiological processes that compensate for novel environmental stresses, such as increased weight and density-driven sedimentation. Weight drives many chemical, biological, and ecological processes on earth. Altering weight changes these processes. The most impo

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25

Yakushin, Sergei B., Yongqing Xiang, Theodore Raphan, and Bernard Cohen. "Spatial Distribution of Gravity-Dependent Gain Changes in the Vestibuloocular Reflex." Journal of Neurophysiology 93, no. 6 (2005): 3693–98. http://dx.doi.org/10.1152/jn.01269.2004.

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This study determined whether dependence of angular vestibuloocular reflex (aVOR) gain adaptation on gravity is a fundamental property in three dimensions. Horizontal aVOR gains were adaptively increased or decreased in two cynomolgus monkeys in upright, side down, prone, and supine positions, and aVOR gains were tested in darkness by yaw rotation with the head in a wide variety of orientations. Horizontal aVOR gain changes peaked at the head position in which the adaptation took place and gradually decreased as the head moved away from this position in any direction. The gain changes were plo

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Ömeroğlu, Ethem, Yaşar Ünlü, Ayşe Nur Uğur Kılınç, Tuğba Günler, and Oğuzhan Günenc. "Histopathologic and Preneoplastic Changes in Tubal Ligation Materials." Medicina 59, no. 12 (2023): 2117. http://dx.doi.org/10.3390/medicina59122117.

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Background and Objectives: To investigate histopathological changes and serous carcinoma precursors such as secretory cell outgrowths (SCOUTs) and p53 signature in the bilateral tubal ligation (BTL) materials used during cesarean section (S/C). Materials and Methods: In total, 138 patients underwent S/C and tubal sterilization (TS) between October 2020 and May 2021 at Konya City Hospital. Patients’ data were obtained from the hospital’s system. All data and findings were investigated and statistically evaluated. Results: The mean age was 34.62 years (22–44), the mean gravity was 4.89 (2–15) an

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27

BERRINO, Giovanna, Peter VAJDA, Pavol ZAHOREC, et al. "Interpretation of spatiotemporal gravity changes accompanying the earthquake of 21 August 2017 on Ischia (Italy)." Contributions to Geophysics and Geodesy 51, no. 4 (2021): 345–71. http://dx.doi.org/10.31577/congeo.2021.51.4.3.

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We analyse spatiotemporal gravity changes observed on the Ischia island (Italy) accompanying the destructive earthquake of 21 August 2017. The 29 May 2016 to 22 September 2017 time-lapse gravity changes observed at 18 benchmarks of the Ischia gravimetric network are first corrected for the gravitational effect of the surface deformation using the deformation-induced topographic effect (DITE) correction. The co-seismic DITE is computed by Newtonian volumetric integration using the Toposk software, a high-resolution LiDAR DEM and the co-seismic vertical displacement field derived from Sentinel-1

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Pohánka, Vladimír, Peter Vajda, and Jaroslava Pánisová. "On inverting gravity changes with the harmonic inversion method: Teide (Tenerife) case study." Contributions to Geophysics and Geodesy 45, no. 2 (2015): 111–34. http://dx.doi.org/10.1515/congeo-2015-0016.

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Abstract Here we investigate the applicability of the harmonic inversion method to time-lapse gravity changes observed in volcanic areas. We carry out our study on gravity changes occured over the period of 2004–2005 during the unrest of the Central Volcanic Complex on Tenerife, Canary Islands. The harmonic inversion method is unique in that it calculates the solution of the form of compact homogeneous source bodies via the mediating 3-harmonic function called quasigravitation. The latter is defined in the whole subsurface domain and it is a linear integral transformation of the surface gravit

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MacRobbie, Madelyn, Vanessa Z. Chen, Cody Paige, David Otuya, Aleksandra Stankovic, and Guillermo Tearney. "Evaluating the Suitability of Perfusion-Based PD Probes for Use in Altered Gravity Environments." Biosensors 15, no. 8 (2025): 478. https://doi.org/10.3390/bios15080478.

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Measurable changes in electrophysiology have been documented in spaceflight, creating a pathway for disease genesis and progression in astronauts. These electrophysiology changes can be measured using potential difference (PD). A probe to measure PD was developed and is used clinically on Earth; this probe relies on fluid perfusion to establish an electrical connection to make PD measurements. The changes to fluid behavior in microgravity and partial gravity (including lunar and Martian gravity) drives the need to test this probe in a spaceflight environment. Here, we test the PD probe in a no

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30

Pylypenko, S., O. Motsyk, and L. Kozak. "Temperature changes over storms from measurements of spacecraft TIMED." Advances in Astronomy and Space Physics 6, no. 1 (2016): 50–55. http://dx.doi.org/10.17721/2227-1481.6.50-55.

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In the present work we have studied changes of mesospheric temperature over the powerful storms Wilma, Haitang, and Katrina using measurements of the space vehicle TIMED. We have found the temperature increasing at the altitude range 80-100 km. We have found the explanations for the obtained results by the dissipation of the gravity waves. Propagation of atmospheric gravity waves in a non-isothermal, windless atmosphere, with taking into account the viscosity and the thermal conductivity, has also been modelled in this work. We have determined that the maximum of amplitude of the atmospheric-g

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31

Lelin, Xing, Li Hui, Xuan Songbai, Kang Kaixuan, and Liu Xiaoling. "Long-term gravity changes in Chinese mainland from GRACE and ground-based gravity measurements." Geodesy and Geodynamics 2, no. 3 (2011): 61–70. http://dx.doi.org/10.3724/sp.j.1246.2011.00061.1.

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32

Indriana, R. D., S. B. Kirbani, A. Setiawan, and T. A. Sunantyo. "Gravity observation data analysis 1988 -1998 - 2011 to determine gravity changes of Merapi volcano." Journal of Physics: Conference Series 983 (March 2018): 012042. http://dx.doi.org/10.1088/1742-6596/983/1/012042.

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33

Goto, Hiroki, Mituhiko Sugihara, Yuji Nishi, and Hiroshi Ikeda. "Simultaneous gravity measurements using two superconducting gravimeters to observe temporal gravity changes below the nm s−2 level: ocean tide loading differences at different distances from the coast." Geophysical Journal International 227, no. 3 (2021): 1591–601. http://dx.doi.org/10.1093/gji/ggab300.

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SUMMARY Gravity monitoring might require observation of temporal changes of gravity below the nanometre per second squared (nm s−2) level, which can be achieved by precise isolation of the signal of interest from all other disturbing effects. One method of signal isolation is elimination of disturbing effects by taking the difference between gravity changes measured simultaneously using two gravimeters installed close together. Herein, we describe differences in temporal gravity changes below the nm s−2 level in the tidal frequency bands as observed through simultaneous measurements taken with

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34

Soldati, G., A. Piersanti, and E. Boschi. "Global postseismic gravity changes of a viscoelastic Earth." Journal of Geophysical Research: Solid Earth 103, B12 (1998): 29867–85. http://dx.doi.org/10.1029/98jb02793.

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35

Okubo, Shuhei. "Potential and gravity changes raised by point dislocations." Geophysical Journal International 105, no. 3 (1991): 573–86. http://dx.doi.org/10.1111/j.1365-246x.1991.tb00797.x.

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36

van Gelderen, Martin, Roger Haagmans, and Mirjam Bilker. "Gravity changes and natural gas extraction in Groningen." Geophysical Prospecting 47, no. 6 (1999): 979–93. http://dx.doi.org/10.1046/j.1365-2478.1999.00159.x.

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37

Nielsen, J. Emil, Rene Forsberg, and Gabriel Strykowski. "Measured and modelled absolute gravity changes in Greenland." Journal of Geodynamics 73 (January 2014): 53–59. http://dx.doi.org/10.1016/j.jog.2013.09.003.

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38

Robinson, Edward L., and Charles A. Fuller. "Gravity and thermoregulation: metabolic changes and circadian rhythms." Pflügers Archiv 441, S1 (2000): R32—R38. http://dx.doi.org/10.1007/s004240000329.

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39

Fujiwara, Yoshihisa, Saburo Higuchi, Akio Hosoya, Takashi Mishima, and Masaru Siino. "Topology changes in (2+1)-dimensional quantum gravity." Physical Review D 44, no. 6 (1991): 1763–68. http://dx.doi.org/10.1103/physrevd.44.1763.

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40

Buravkova, L. B., Yu A. Romanov, N. A. Konstantinova, S. V. Buravkov, Yu G. Gershovich, and I. A. Grivennikov. "Cultured stem cells are sensitive to gravity changes." Acta Astronautica 63, no. 5-6 (2008): 603–8. http://dx.doi.org/10.1016/j.actaastro.2008.04.012.

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Crevecoeur, F., J. McIntyre, J. L. Thonnard, and P. Lefèvre. "Gravity-dependent estimates of object mass underlie the generation of motor commands for horizontal limb movements." Journal of Neurophysiology 112, no. 2 (2014): 384–92. http://dx.doi.org/10.1152/jn.00061.2014.

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Moving requires handling gravitational and inertial constraints pulling on our body and on the objects that we manipulate. Although previous work emphasized that the brain uses internal models of each type of mechanical load, little is known about their interaction during motor planning and execution. In this report, we examine visually guided reaching movements in the horizontal plane performed by naive participants exposed to changes in gravity during parabolic flight. This approach allowed us to isolate the effect of gravity because the environmental dynamics along the horizontal axis remai

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Thiel, Cora S., Christian Vahlensieck, Timothy Bradley, Svantje Tauber, Martin Lehmann, and Oliver Ullrich. "Metabolic Dynamics in Short- and Long-Term Microgravity in Human Primary Macrophages." International Journal of Molecular Sciences 22, no. 13 (2021): 6752. http://dx.doi.org/10.3390/ijms22136752.

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Microgravity acts on cellular systems on several levels. Cells of the immune system especially react rapidly to changes in gravity. In this study, we performed a correlative metabolomics analysis on short-term and long-term microgravity effects on primary human macrophages. We could detect an increased amino acid concentration after five minutes of altered gravity, that was inverted after 11 days of microgravity. The amino acids that reacted the most to changes in gravity were tightly clustered. The observed effects indicated protein degradation processes in microgravity. Further, glucogenic a

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Ogneva, Irina V. "Single Cell in a Gravity Field." Life 12, no. 10 (2022): 1601. http://dx.doi.org/10.3390/life12101601.

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The exploration of deep space or other bodies of the solar system, associated with a long stay in microgravity or altered gravity, requires the development of fundamentally new methods of protecting the human body. Most of the negative changes in micro- or hypergravity occur at the cellular level; however, the mechanism of reception of the altered gravity and transduction of this signal, leading to the formation of an adaptive pattern of the cell, is still poorly understood. At the same time, most of the negative changes that occur in early embryos when the force of gravity changes almost disa

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Young, Wendy May, and David Lumley. "Feasibility analysis for time-lapse seafloor gravity monitoring of producing gas fields in the Northern Carnarvon Basin, offshore Australia." GEOPHYSICS 80, no. 2 (2015): WA149—WA160. http://dx.doi.org/10.1190/geo2014-0264.1.

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Highly accurate seafloor gravity data can detect small density changes in subsurface hydrocarbon reservoirs by precisely repositioning the gravimeters on the seafloor. In producing gas fields, these small density changes are primarily caused by production-related changes to the pressure and gas/fluid saturations in the reservoir pore space. Knowledge of the pressure and saturation changes is vital to optimize the gas recovery, especially in offshore environments in which wells are expensive and sparse. We assessed the feasibility of time-lapse seafloor gravity monitoring for the giant gas fiel

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Creutzfeldt, Benjamin, Andreas Güntner, Thomas Klügel, and Hartmut Wziontek. "Simulating the influence of water storage changes on the superconducting gravimeter of the Geodetic Observatory Wettzell, Germany." GEOPHYSICS 73, no. 6 (2008): WA95—WA104. http://dx.doi.org/10.1190/1.2992508.

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Superconducting gravimeters (SG) measure temporal changes of the Earth’s gravity field with high accuracy and long-term stability. Variations in local water storage components (snow, soil moisture, groundwater, surface water, and water stored by vegetation) can have a significant influence on SG measurements and — from a geodetic perspective — add noise to the SG records. At the same time, this hydrological gravity signal can provide substantial information about the quantification of water balances. A 4D forward model with a spatially nested discretization domain was developed to investigate

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Tanaka, Yusaku. "Coseismic Gravity Changes and Crustal Deformation Induced by the 2018 Fiji Deep-Focus Earthquake Observed by GRACE and GRACE-FO Satellites." Remote Sensing 15, no. 2 (2023): 495. http://dx.doi.org/10.3390/rs15020495.

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Earthquakes at depths of ≥300 km are generally called deep-focus earthquakes. Only two deep-focus earthquakes with Mw 8.0 or more have occurred in this century—the 2013 Okhotsk earthquake (Mw 8.3) and the 2018 Fiji earthquake (Mw 8.2) on 19 August 2018. However, the 2018 Fiji earthquake was only reported on seismographs, and the related crustal deformations were not observed by the Global Navigation Satellite System because the observation network did not exist around the epicenter. This study analyzed the time series of gravity data observed by the Gravity Recovery And Climate Experiment (GRA

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Landrø, Martin, and Mark Zumberge. "Estimating saturation and density changes caused by CO2 injection at Sleipner — Using time-lapse seismic amplitude-variation-with-offset and time-lapse gravity." Interpretation 5, no. 2 (2017): T243—T257. http://dx.doi.org/10.1190/int-2016-0120.1.

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We have developed a calibrated, simple time-lapse seismic method for estimating saturation changes from the [Formula: see text]-storage project at Sleipner offshore Norway. This seismic method works well to map changes when [Formula: see text] is migrating laterally away from the injection point. However, it is challenging to detect changes occurring below [Formula: see text] layers that have already been charged by some [Formula: see text]. Not only is this partly caused by the seismic shadow effects, but also by the fact that the velocity sensitivity for [Formula: see text] change in saturat

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Yakushin, Sergei B., Theodore Raphan, and Bernard Cohen. "Gravity-Specific Adaptation of the Angular Vestibuloocular Reflex: Dependence on Head Orientation With Regard to Gravity." Journal of Neurophysiology 89, no. 1 (2003): 571–86. http://dx.doi.org/10.1152/jn.00287.2002.

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The gain of the vertical angular vestibuloocular reflex (aVOR) was adaptively altered by visual-vestibular mismatch during rotation about an interaural axis, using steps of velocity in three head orientations: upright, left-side down, and right-side down. Gains were decreased by rotating the animal and visual surround in the same direction and increased by visual and surround rotation in opposite directions. Gains were adapted in one head position (single-state adaptation) or decreased with one side down and increased with the other side down (dual-state adaptation). Animals were tested in dar

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49

Vigouroux, Nathalie, Glyn Williams-Jones, William Chadwick, Dennis Geist, Andres Ruiz, and Dan Johnson. "4D gravity changes associated with the 2005 eruption of Sierra Negra volcano, Galápagos." GEOPHYSICS 73, no. 6 (2008): WA29—WA35. http://dx.doi.org/10.1190/1.2987399.

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Sierra Negra volcano, the most voluminous shield volcano in the Galápagos archipelago and one of the largest basaltic calderas in the world, erupted on October 22, 2005 after more than [Formula: see text] of quiescence. GPS and satellite radar interferometry (InSAR) monitoring of the deformation of the caldera floor in the months prior to the eruption documented extraordinary inflation rates [Formula: see text]. The total amount of uplift recorded since monitoring began in 1992 approached [Formula: see text] at the center of the caldera over the eight days of the eruption the caldera floor def

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50

Reguzzoni, Mirko, Federica Migliaccio, and Khulan Batsukh. "Gravity Field Recovery and Error Analysis for the MOCASS Mission Proposal Based on Cold Atom Interferometry." Pure and Applied Geophysics 178, no. 6 (2021): 2201–22. http://dx.doi.org/10.1007/s00024-021-02756-5.

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AbstractSatellite missions providing data for a continuous monitoring of the Earth gravity field and its changes are fundamental to study climate changes, hydrology, sea level changes, and solid Earth phenomena. GRACE-FO (Gravity Recovery and Climate Experiment Follow-On) mission was launched in 2018 and NGGM (Next Generation Gravity Mission) studies are ongoing for the long-term monitoring of the time-variable gravity field. In recent years, an innovative mission concept for gravity measurements has also emerged, exploiting a spaceborne gravity gradio-meter based on cold atom interferometers.

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