Results 81 to 90 of about 3,325 (271)

Unraveling the Source Locations of Short‐Period Secondary Microseisms

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Primary and secondary microseisms are generated by ocean wave interactions, with the latter occasionally split into short‐ and long‐period bands in some regions. The short‐period secondary microseism (SPSM) sources have traditionally been associated with nearby coastal segments, suggesting a more uniform distribution across shorelines.
Samuel Jorde, Martin Schimmel, Eleonore Stutzmann, Zongbo Xu, Pilar Sánchez‐Pastor, Helena Seivane, Jordi Díaz   +6 more
wiley   +1 more source

Subsonic near-surface P-velocity and low S-velocity observations using propagator inversion [PDF]

, 2005
Detailed knowledge of near-surface P- and S-wave velocities is important for processing and interpreting multicomponent land seismic data because (1) the entire wavefield passes through and is influenced by the near-surface soil conditions, (2) both ...
Andrew Curtis, Curtis, A.; id_orcid, Trampert, J., van Vossen, R., Robbert van Vossen, Jeannot Trampert   +5 more
core   +1 more source

Full-waveform inversion reveals diverse origins of lower mantle positive wave speed anomalies

Scientific Reports
Determining Earth’s structure is paramount to unravel its interior dynamics. Seismic tomography reveals positive wave speed anomalies throughout the mantle that spatially correlate with the expected locations of subducted slabs. This correlation has been
Thomas L. A. Schouten, Lars Gebraad, Sebastian Noe, Anna J. P. Gülcher, Solvi Thrastarson, Dirk-Philip van Herwaarden, Andreas Fichtner   +6 more
doaj   +1 more source

Seismic Velocity Variations Illustrate Hydrological and Ecohydrological Processes in a Mountain Watershed

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract We employ passive seismic interferometry to study seismic hydrological responses in a snowmelt‐driven, semi‐arid catchment. Seismic velocity changes (dv/v) at 2–4 Hz and 4–8 Hz are analyzed from six stations along a hillslope transect between May and November 2023 and compared to precipitation, soil moisture, and groundwater level timeseries ...
Kuan‐Fu Feng, Fan‐Chi Lin, Sara Warix, Paul D. Brooks, Qicheng Zeng, Tonie van Dam   +5 more
wiley   +1 more source

Frequency‐Dependent Acoustic Reflection Coefficients of Flat Ground Assessed Using the Sonic Boom From the OSIRIS‐Rex Sample Return Capsule Recorded on Free Flying Balloons

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract Low frequency sound can travel great distances in planetary atmospheres. When these waves reflect off the air/ground interface, energy may be absorbed or transferred to mechanical waves in the subsurface. This study describes the direct and reflected acoustic wave generated by the re‐entry of the OSIRIS‐REx Sample Return Capsule captured on a ...
Daniel C. Bowman, Jonathan M. Lees, Siddharth Krishnamoorthy, Elizabeth A. Silber, Jacob S. Izraelevitz, Ashish Goel, Emalee Hough, Zach Yap, Mirza Samnani, Michael J. Fleigle, Justin R. LaPierre, James A. Cutts, Attila Komjathy   +12 more
wiley   +1 more source

静动力边界转换及其合理性验证方法的研究

Dizhen xuebao
繁琐复杂的静动力边界转换处理是进行静动力耦合模拟的关键步骤，为了研究黏弹性边界条件下传统静动力边界转换的合理性及其验证方法的适用性，本文首先根据弹性叠加原理提出了一种验证静动力耦合模拟分析中静动力边界转换合理性的方法（参考解法）；然后基于有限元软件ABAQUS，并结合自行研发的适用于成层介质的黏弹性边界施加和等效节点力计算程序VBEA2.0，对多土层自由场静动力耦合模型和土-地下结构静动力耦合模型进行了地震反应分析，对参考解法的适用性进行了探究；最后使用本文提出的参考解法 ...
Shengjie Ma, Mingjie Chi, Xueliang Chen, Su Chen, Hongjuan Chen, Haojie Xing   +5 more
doaj   +1 more source

Design and implementation of Awas Guncang: A mobile app for future dissemination of InaEEWS [PDF]

E3S Web of Conferences
Indonesia is a country with a high level of seismic risk, making an effective Earthquake Early Warning System (EEWS) crucial. The Agency of Meteorology, Climatology, and Geophysics (BMKG) has been developing the Indonesia Earthquake Early Warning System (
Kurniawan Hanif, Frederik Mustamu Abraham, Putra Maulana, Nardi, Bratasena Alhaq Arya, Reza July Utama Muhammad, Fajri Miftakhunnisa Aurora, Heryanto Rusanto Benyamin   +7 more
doaj   +1 more source

Observational Evidence of a Very‐Low‐Frequency Earthquake (Mw 3.8) Leading to an Earthquake (Mw 4.2): Minto Flats Strike‐Slip Fault Zone, Central Alaska

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The physical conditions governing earthquake initiation are largely unknown, particularly in the minutes to seconds preceding rupture. While there is geodetic and seismic evidence of precursory activity in the hours to weeks prior to large earthquakes, the observational evidence immediately preceding the earthquake rupture is limited and ...
A. M. McPherson, C. Tape, Y. Kaneko
wiley   +1 more source

Nuevas técnicas de deconvolución dispersa robusta [PDF]

, 2007
La deconvolución dispersa consiste en estimar una señal de reducido número de muestras no nulas a partir de un conjunto de observaciones ruidosas, que se suponen originadas por la convolución entre una señal de aspecto impulsivo y la respuesta al ...
Martínez Cruz, Carlos Eugenio
core  

Thermal Structure Beneath the Himalayan Orogen Revealed by Pn‐Wave Receiver Function Imaging

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The Himalayan orogen formed through convergence between the Indian and Eurasian plates, and parts of the subducting Indian crust were impeded by the Lhasa terrane and accreted into the orogen. However, whether the Indian lower crust was stripped from the downgoing plate and incorporated into the orogen, and by what mechanism, remain debated ...
Liangyu Zhang, Xiaobo Tian, Jia‐Min Wang, Xiaofeng Liang   +3 more
wiley   +1 more source