Results 61 to 70 of about 2,082 (203)

Some characteristics of foreshocks and aftershocks of the 2022 ML6.8 Chihshang, Taiwan, earthquake sequence

Frontiers in Earth Science
Foreshocks and aftershocks occurred before and after the ML6.8 (Mw7.0) earthquake in eastern Taiwan on 18 September 2022. We explore the epicentral distribution and temporal variations for the mainshock, foreshocks, and aftershocks.
Kou-Cheng Chen, Bor-Shouh Huang, Kwang-Hee Kim, Jeen-Hwa Wang, Jeen-Hwa Wang   +4 more
doaj   +1 more source

Shocklets and Short Large Amplitude Magnetic Structures (SLAMS) in the High Mach Foreshock of Venus

Geophysical Research Letters, 2023
Shocklets and short large‐amplitude magnetic structures (SLAMS) are steepened magnetic fluctuations commonly found in Earth's upstream foreshock. Here we present Venus Express observations from the 26th of February 2009 establishing their existence in ...
Glyn A. Collinson, Heli Hietala, Ferdinand Plaschke, Tomas Karlsson, Lynn B. Wilson III, Martin Archer, Markus Battarbee, Xochitl Blanco‐Cano, Cesar Bertucci, David Long, Merav Opher, Nick Sergis, Claire Gasque, Terry Liu, Savvas Raptis, Sofia Burne, Rudy Frahm, Tielong Zhang, Yoshifumi Futaana   +18 more
doaj   +1 more source

Plasma Stability in Turbulent Magnetic Flux Ropes Downstream of a Collisionless Shock

Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.
Abstract How pre‐existing solar wind turbulence, and coherent structures such as magnetic flux ropes within it, influence the transition of plasma across a shock is still poorly understood. Recently, in situ observations from the Earth's magnetosheath have been used to study plasma stability against ion kinetic instabilities. In the turbulent flow, the
L. Vuorinen, D. Burgess, F. Koller, D. Trotta   +3 more
wiley   +1 more source

Saturn's ULF wave foreshock boundary: Cassini observations [PDF]

, 2013
Even though the solar wind is highly supersonic, intense ultra-low frequency (ULF) wave activity has been detected in regions just upstream of the bow shocks of magnetized planets.
Bertucci, Cesar, Dougherty, M., Mazelle, C., Andrés, Nahuel, Gomez, Daniel Osvaldo   +4 more
core   +1 more source

Seismogenic structure behaviour revealed by spatial clustering of seismicity in the Umbria-Marche Region (Central Italy)

Annals of Geophysics, 1998
Time variations in the spatial distribution of earthquake epicentres are analyzed by application of the fractal correlation dimension method. The zone under investigation is located in Central Italy, bounded in longitude by 12.0 and 14.4 degrees east and
P. Tosi
doaj   +1 more source

Ion Behavior at Shocklets: A Case Study of MMS Observations

Geophysical Research Letters, 2022
The existence of shocklets, a kind of solitary structure, has been demonstrated in the Earth's foreshock regions for decades. Their formation and evolution are believed to be controlled by ions. However, the detailed behavior of ions at them has not been
Z.‐Y. Liu, Q.‐G. Zong, H. Zhang, J.‐T. Zhao, R. Rankin, C. J. Pollock, G. Le   +6 more
doaj   +1 more source

Aerial and Space‐Borne Seismology on Venus: Viability and Design Implications for Future Missions

Earth and Space Science, Volume 13, Issue 6, June 2026.
Abstract Venus' evolution remains a mystery because of the lack of in situ geophysical data to constrain its interior structure. Recently‐selected planetary missions VERITAS (NASA), DAVINCI+ (NASA), and EnVision (ESA) will investigate the planet's interior, surface, and atmospheric chemistry.
Quentin Brissaud, Chenxi Kong, Marouchka Froment, John Wilding, Anna J. P. Gülcher, Jennifer M. Jackson, Iris van Zelst, Raphaël F. Garci, Celine Marie Solberg, Sven Peter Näsholm   +9 more
wiley   +1 more source

A Deep Learning Framework for Peak Ground Velocity Prediction Using Multi‐Station Velocity Waveforms: The Taiwan Transformer Shaking Alert Model (TT‐SAM)

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract This study proposes a deep‐learning–based regional earthquake early warning model, the Taiwan Transformer Shaking Alert Model (TT‐SAM). The model adopts peak ground velocity (PGV) as its primary ground shaking prediction unit, aiming to better reflect actual structural damage and thereby enhance the practical utility and accuracy of the ...
Yu‐Heng Chen, Chung‐Han Chan, Chieh‐Chen Chang, Kuo‐Fong Ma   +3 more
wiley   +1 more source

Source Parameters of the 1906 Manas (Mw 7.7), 1944 Xinyuan (Mw 7.2) and 1812 Nilke Earthquakes and Seismotectonics of the Borohoro Shan, Western China

Tectonics, Volume 45, Issue 6, June 2026.
Abstract The 1906 Manas Earthquake is the largest earthquake recorded in the Borohoro Shan (BRS) since 1900. The reported magnitude ranges from 7.2 to 8.3, but uncertainties remain regarding its size, mechanism, and responsible fault. Similar confusion exists for the 1812 Nilke and 1944 Xinyuan Earthquakes, the only other Mw > 7 earthquakes in the NE ...
C.‐H. Tsai, G. Kulikova, F. Krüger, R. T. Walker   +3 more
wiley   +1 more source

Characteristics of Foreshock Subsolar Compressive Structures

Journal of Geophysical Research: Space Physics, 2023
Abstract The turbulent foreshock region upstream of the quasi‐parallel bow shock is dominated by waves and reflected particles that interact with each other and create a large number of different foreshock transients. The structures with the enhanced magnetic field, Short Large Amplitude Magnetic Structures, and density spikes named ...
Niki Xirogiannopoulou, Oleksandr Goncharov, Jana Safrankova, Zdenek Nemecek   +3 more
openaire   +1 more source