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  1. In the infrasonic observation of a fumarolic field, distinguishing multiple fumarolic sources is challenging. The array technique effectively estimates the source locations and identifies the target signal fro...

    Authors: Kazuya Yamakawa, Mie Ichihara, Dan Muramatsu, Takeshi Matsushima, Hidetoshi Takahashi, Ruka Wada and Isao Shimoyama
    Citation: Earth, Planets and Space 2023 75:26
  2. The 2022 eruption of the Hunga Tonga-Hunga Ha'apai volcano excited an atmospheric Lamb wave, which induced a fast-traveling tsunami. This tsunami was driven by the pressure-forced wave traveling at the speed o...

    Authors: Tung-Cheng Ho, Nobuhito Mori and Masumi Yamada
    Citation: Earth, Planets and Space 2023 75:25
  3. We investigated temporal changes in the rock-magnetic properties of volcanic ash ejected from the Aso Nakadake volcano during a sequence of ash eruptions from 2019 to 2020. For 39 volcanic ash samples, magneti...

    Authors: Chisato Anai, Takahiro Ohkura, Shin Yoshikawa and Nobutatsu Mochizuki
    Citation: Earth, Planets and Space 2023 75:24
  4. We have carried out paleomagnetic analyses of tephras from the Taupō eruption, one of the most violent eruptions on Earth in the past 5000 years. Pyroclastic deposits were collected with 7 cm3 cubes pushed into e...

    Authors: Takeshi Hasegawa, Annika Greve, Darren M. Gravley, Chie Kusu, Yasuaki Kaneda, Shohei Shibata, Makoto Okada, Szabolcs Kósik, Nobutatsu Mochizuki and Gillian Turner
    Citation: Earth, Planets and Space 2023 75:23
  5. We have studied the convective (or static) and dynamic instabilities between 80 and 100 km above Tromsø (69.6° N, 19.2° E) using temperature and wind data of 6 min and 1 km resolutions primarily almost over a ...

    Authors: Satonori Nozawa, Norihito Saito, Takuya Kawahara, Satoshi Wada, Takuo T. Tsuda, Sakiho Maeda, Toru Takahashi, Hitoshi Fujiwara, Viswanathan Lakshmi Narayanan, Tetsuya Kawabata and Magnar G. Johnsen
    Citation: Earth, Planets and Space 2023 75:22
  6. With the accumulation of data, it is possible to study the long-term variation of Fluxgate Magnetometers (FGM) of High Precision Magnetometer (HPM) onboard the China Seismo-Electromagnetic Satellite (CSES). Th...

    Authors: Yuqi Tong, Bin Zhou, Lei Li, Bingjun Cheng, Yiteng Zhang, Werner Magnes, Roland Lammegger, Andreas Pollinger, Yanyan Yang, Zhima Zeren and Xuhui Shen
    Citation: Earth, Planets and Space 2023 75:21
  7. To clarify the characteristics of high-frequency (> 1 Hz) S and S-coda waves at ocean-bottom seismometers (OBSs), we analyzed seismograms observed at permanent OBSs and inland broadband seismometers around the Ki...

    Authors: Shunsuke Takemura, Kentaro Emoto and Lina Yamaya
    Citation: Earth, Planets and Space 2023 75:20
  8. We review pre-eruptive dynamics and evidence of open-system behavior in the volcanic plumbing system beneath Campi Flegrei Caldera, together with estimates of magma residence time, magma ascent, and mixing-to-...

    Authors: Maurizio Petrelli, Mónica Ágreda López, Alessandro Pisello and Diego Perugini
    Citation: Earth, Planets and Space 2023 75:19
  9. A major source of error in interferometric synthetic aperture radar (InSAR), used for mapping ground deformation, is the delay caused by changes in the propagation velocity of radar microwaves in the troposphe...

    Authors: Sardila Nurulhikmah Sailellah and Yo Fukushima
    Citation: Earth, Planets and Space 2023 75:18
  10. The 2016 Kumamoto earthquakes caused severe damage centering on the Mashiki residential area. The velocity waveforms at station KMMH16 in Mashiki, during the M7.3 mainshock, show large pulses. We found that sever...

    Authors: Anatoly Petukhin, Hiroshi Kawase, Fumiaki Nagashima and Eri Ito
    Citation: Earth, Planets and Space 2023 75:16
  11. We report the preliminary inter-satellite comparisons of the in situ ion density measurements by the ion velocity meter (IVM) onboard FORMOSAT-7/COSMIC-2 (F7/C2) and Ionospheric Connection Explorer (ICON) miss...

    Authors: Jong-Min Choi, Charles Chien-Hung Lin, Rajesh Panthalingal Krishanunni, Jaeheung Park, Young-Sil Kwak, Shih-Ping Chen, Jia-Ting Lin and Min-Ti Chang
    Citation: Earth, Planets and Space 2023 75:15
  12. In subduction zones, slip deficit monitoring along the plate interface is important for understanding the seismogenesis of megathrust earthquakes. In the last two decades, aseismic slip transients, such as slo...

    Authors: Suguru Yabe, Tadafumi Ochi, Norio Matsumoto, Satoshi Itaba, Yuichi Kitagawa and Takanori Matsuzawa
    Citation: Earth, Planets and Space 2023 75:13
  13. Using the 3-D axial anisotropy, the dipping anisotropy, and the azimuthal anisotropy as case studies, we investigated the influence of each anisotropic resistivity element on the magnetotelluric surface respon...

    Authors: Wisart Thongyoy, Weerachai Siripunvaraporn, Tawat Rung-Arunwan and Puwis Amatyakul
    Citation: Earth, Planets and Space 2023 75:12
  14. During the middle Miocene, forearc alkaline magmatism occurred in the Outer Zone of Southwest Japan and the northern Ryukyu Arc, resulting in the formation of forearc alkaline basaltic rocks with ocean island ...

    Authors: Ginta Motohashi, Osamu Ishizuka, Hirokuni Oda, Takashi Sano, Shun Sekimoto and Kohtaro Ujiie
    Citation: Earth, Planets and Space 2023 75:9
  15. The mapping of available water–ice is a crucial step in the lunar exploration missions. Ground penetrating radars have the potential to map the subsurface structure and the existence of water–ice in terms of t...

    Authors: M. Kobayashi, H. Miyamoto, B. D. Pál, T. Niihara and T. Takemura
    Citation: Earth, Planets and Space 2023 75:8
  16. Global ionospheric maps based on GNSS measurements are nowadays often used to correct satellite altimeter measurements when the instruments have only one frequency or measure over coasts and inland waters. If ...

    Authors: Denise Dettmering and Christian Schwatke
    Citation: Earth, Planets and Space 2023 75:7
  17. Nishiyama volcano on Hachijojima Island is an active basaltic volcano located in the Izu–Bonin arc. In this study, petrological and geochemical analyses were conducted on mafic lavas and pyroclastics to unders...

    Authors: Kazuki Oiwa, Takeshi Kuritani, Mitsuhiro Nakagawa and Shumpei Yoshimura
    Citation: Earth, Planets and Space 2023 75:6
  18. Improving and homogenizing time and space reference systems on Earth and, more specifically, realizing the Terrestrial Reference Frame (TRF) with an accuracy of 1 mm and a long-term stability of 0.1 mm/year ar...

    Authors: Pacôme Delva, Zuheir Altamimi, Alejandro Blazquez, Mathis Blossfeld, Johannes Böhm, Pascal Bonnefond, Jean-Paul Boy, Sean Bruinsma, Grzegorz Bury, Miltiadis Chatzinikos, Alexandre Couhert, Clément Courde, Rolf Dach, Véronique Dehant, Simone Dell’Agnello, Gunnar Elgered…
    Citation: Earth, Planets and Space 2023 75:5
  19. Sample-return missions allow the study of materials collected directly from celestial bodies, unbiased by atmospheric entry effects and/or terrestrial alteration and contamination phenomena, using state-of-the...

    Authors: Stefano Rubino, Zélia Dionnet, Alice Aléon-Toppani, Rosario Brunetto, Tomoki Nakamura, Donia Baklouti, Zahia Djouadi, Cateline Lantz, Obadias Mivumbi, Ferenc Borondics, Stephane Lefrançois, Christophe Sandt, Francesco Capitani, Eva Héripré, David Troadec, Megumi Matsumoto…
    Citation: Earth, Planets and Space 2023 75:4
  20. Our recent paper (Nishiyama et al. in Earth Planets Space 73:126, 2021) suggested that the sealing time of a crack-seal event recorded in quartz-filled shear veins in the Makimine mélange may temporally increa...

    Authors: Naoki Nishiyama
    Citation: Earth, Planets and Space 2023 75:3

    The original article was published in Earth, Planets and Space 2023 75:2

  21. A recent paper by Nishiyama et al. (Earth, Planets, and Space 73:126) examined syntectonic quartz veins to constrain temporal variations in the recurrence intervals between slow slip and tremor events. The aut...

    Authors: Randolph T. Williams
    Citation: Earth, Planets and Space 2023 75:2

    The original article was published in Earth, Planets and Space 2021 73:126

    The Comment to this article has been published in Earth, Planets and Space 2023 75:3

  22. S-net is a large-scale ocean bottom (OB) network in the Japan Trench area, consisting of inline-type 150 observatories equipped with seismometers and pressure gauges. Among them, 41 observatories have been bur...

    Authors: Yadab P. Dhakal, Takashi Kunugi, Hiroaki Yamanaka, Atsushi Wakai, Shin Aoi and Azusa Nishizawa
    Citation: Earth, Planets and Space 2023 75:1
  23. The Izu–Bonin–Mariana Subduction System (IBM) is one of the longest subduction zones in the world with no instrumental history of shallow focus, great earthquakes (Mw > 8). Over the last 50 years, researchers ...

    Authors: Walter Szeliga, Rachelle Reisinger and Breanyn MacInnes
    Citation: Earth, Planets and Space 2022 74:193
  24. Advanced geodetic and astronomical tasks, such as precise positioning and navigation require forecasted Earth Orientation Parameters (EOP). The Second Earth Orientation Parameters Prediction Comparison Campaig...

    Authors: Tomasz Kur, Henryk Dobslaw, Justyna Śliwińska, Jolanta Nastula, Małgorzata Wińska and Aleksander Partyka
    Citation: Earth, Planets and Space 2022 74:191
  25. The Hayabusa2 spacecraft succeeded in sampling and returning materials from the C-type, near-Earth asteroid (162173) Ryugu. As part of the Hayabusa2 Initial Analyses, chemical and isotopic compositions of vola...

    Authors: Ryuji Okazaki, Shinji Yamanouchi, Kazuhiko Shimada, Atsushi Baba, Fumio Kitajima and Toru Yada
    Citation: Earth, Planets and Space 2022 74:190
  26. The most important aim in interpreting an oblique ionogram is to obtain the accurate Junction Frequencies (JFs) of the ordinary (O) and extraordinary (X) mode. This requires the correct identification of O- an...

    Authors: Sun FengJuan, Wan XianRong, Zhang HongBo, Zhou Bao, Ban PanPan and Cao Hongyan
    Citation: Earth, Planets and Space 2022 74:189
  27. Plasma particles and waves are important observation targets in space plasmas for understanding the mechanisms of energy and momentum transfer between waves and particles because space plasmas are essentially ...

    Authors: Motoyuki Kikukawa, Kazushi Asamura, Takahiro Zushi, Satoshi Kurita and Hirotsugu Kojima
    Citation: Earth, Planets and Space 2022 74:188
  28. We have devoted efforts to the development and performance evaluation of new low-cost ionospheric instruments for studies that require distributed observations and for educational and citizen science initiativ...

    Authors: Josemaria Gomez Socola and Fabiano S. Rodrigues
    Citation: Earth, Planets and Space 2022 74:185
  29. Neutral thermospheric density is an essential quantity required for precise orbit determination of satellites, collision avoidance of satellites, re-entry prediction of satellites or space debris, and satellit...

    Authors: Armin Corbin and Jürgen Kusche
    Citation: Earth, Planets and Space 2022 74:183
  30. Due to their sensitivity to conductivity and oceanic transport, magnetic signals caused by the movement of the ocean are a beneficial source of information. Satellite observed tidal-induced magnetic fields hav...

    Authors: Aaron Hornschild, Julien Baerenzung, Jan Saynisch-Wagner, Christopher Irrgang and Maik Thomas
    Citation: Earth, Planets and Space 2022 74:182
  31. We assess the performance of the thermal ion imaging (TII) technique as conceived for the Swarm Earth Explorer satellites. Analysis, simulation, and laboratory testing performed prior to flight provided estima...

    Authors: Johnathan K. Burchill and David J. Knudsen
    Citation: Earth, Planets and Space 2022 74:181
  32. The density of the solar wind plasma near the Earth’s magnetosphere sometimes decreases to only several per cent of the usual value, and such density extrema result in a significant reduction of the dynamic pr...

    Authors: Masaki N. Nishino, Hiroshi Hasegawa, Yoshifumi Saito, Benoit Lavraud, Yukinaga Miyashita, Motoharu Nowada, Satoshi Kasahara and Tsugunobu Nagai
    Citation: Earth, Planets and Space 2022 74:180
  33. We propose a statistical analysis method to identify common features of seismic activity that are indistinguishable from most other seismicity, and to find anomalous activity that differs from these common fea...

    Authors: Kohei Nagata, Koji Tamaribuchi, Fuyuki Hirose and Akemi Noda
    Citation: Earth, Planets and Space 2022 74:179
  34. Laterally directed explosive eruptions are responsible for multiple fatalities over the past decade and are an increasingly important volcanology problem. To understand the energy dynamics for these events, we...

    Authors: Arthur D. Jolly, Ben Kennedy, Robin S. Matoza, Alexandra M. Iezzi, Bruce Christenson, Richard Johnson, Amilea Sork and David Fee
    Citation: Earth, Planets and Space 2022 74:177
  35. Permutation entropy (PE) is a complexity metric that encodes a time series into sequences of symbols and can be used to decipher between deterministic and stochastic behavior. This study investigates PE variat...

    Authors: K. I. Konstantinou, D. A. Rahmalia, I. Nurfitriana and M. Ichihara
    Citation: Earth, Planets and Space 2022 74:175
  36. Deep low-frequency (DLF) earthquakes have occurred at depths of 10–30 km in the Kirishima volcanic complex, Japan. Here, we investigate the DLF earthquake activity that was associated with the 2018 eruptions, ...

    Authors: Ryo Kurihara and Aitaro Kato
    Citation: Earth, Planets and Space 2022 74:174
  37. In this study, we have investigated the ionospheric responses on the August 2017 solar eclipse event by using a three-dimensional tomography algorithm with the ground-based GNSS (Global Navigation Satellite Sy...

    Authors: C. H. Chen, Charles C. H. Lin, C. J. Lee, J. Y. Liu and A. Saito
    Citation: Earth, Planets and Space 2022 74:173
  38. The shapes of regolith particles on airless bodies, such as the Moon and asteroids, are important to understand their formation and evolution on surfaces. Limited studies have shown that the three-dimensional ...

    Authors: Akira Tsuchiyama, Takashi Sakurama, Tsukasa Nakano, Kentaro Uesugi, Makiko Ohtake, Takashi Matsushima, Kazuo Terakado and Erik M. Galimov
    Citation: Earth, Planets and Space 2022 74:172
  39. We conducted seismic tomography for entire Japanese Islands including the Sea of Japan and the Pacific Ocean using arrival times from reflection survey as well as the routine seismic network. We successfully i...

    Authors: Makoto Matsubara, Tatsuya Ishiyama, Tetsuo No, Kenji Uehira, Masashi Mochizuki, Toshihiko Kanazawa, Narumi Takahashi and Shin’ichiro Kamiya
    Citation: Earth, Planets and Space 2022 74:171

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