Results 31 to 40 of about 200 (137)

Feasibility of a borehole VHF radar technique for fracture mapping

, 1984
Experiments were conducted to establish the feasibility of a downhole high-frequency electromagnetic technique for location of fractures in the vicinity of boreholes.
Chang, H. T.
core  

Characterizing Fractured Zones in Urban Karst Geology Using Leaky Surface Waves From Distributed Acoustic Sensing

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 7, July 2025.
Abstract Urban karst geology poses significant geohazard risks, most notably sinkholes and surface depression stemming from soluble and fractured bedrock that is prone to dissolution and collapse. However, mapping and characterizing these hazards using traditional geophysical surveys in cities is challenging due to dense infrastructure and high levels ...
Zhinong Wang, Tieyuan Zhu
wiley   +1 more source

Interpreting Ice Anisotropy of Greenland's Fastest Outlet Glacier Using Basal Icequakes

Geophysical Research Letters, Volume 52, Issue 12, 28 June 2025.
Abstract Ice anisotropy can have significant impact on ice rheology and flow dynamics. However, a lack of in situ measurements limits the validation and incorporation of anisotropy, so most ice flow models assume isotropic ice. Especially observations of anisotropy in fast‐flowing ice streams are scarce.
A. Nap, T. Hudson, F. Walter, A. Wehrlé, A. Kneib‐Walter, H. Rousseau, M. P. Lüthi   +6 more
wiley   +1 more source

Radiation characteristics of corner reflector antennas.

, 1998
PhDThis thesis presents a study of the radiation characteristics of corner reflector antennas. The influence of the design parameters on the radiation characteristics are assessed using an analytical method and the Finite Difference Time Domain (FDTD)
Sterr, U.
core  

Delineation of the Fractured-Rock and Unconsolidated Overburden Ground-Water Flow Systems, on the Southern Part of Manhattan, New York, Through Use of Advanced Borehole-Geophysical Techniques

, 2005
Advanced borehole-geophysical techniques were used to assess the geohydrology of crystalline bedrock in 31 of 64 boreholes on the southern part of Manhattan Island, N.Y.
Stumm, Frederick
core  

Applied research of comprehensive advance geological prediction in Daluoshan water diversion tunnel. [PDF]

Sci Rep, 2023
Liu M, Gan Q.
europepmc   +1 more source

Application and Development of Fiber Optic Gyroscope Inertial Navigation System in Underground Space. [PDF]

Sensors (Basel), 2023
Xu H, Wang L, Zu Y, Gou W, Hu Y.
europepmc   +1 more source

Rapid basal melting of the Greenland Ice Sheet from surface meltwater drainage. [PDF]

Proc Natl Acad Sci U S A, 2022
Young TJ, Christoffersen P, Bougamont M, Tulaczyk SM, Hubbard B, Mankoff KD, Nicholls KW, Stewart CL.   +7 more
europepmc   +1 more source

Spatiotemporal heterogeneity of land subsidence in Beijing. [PDF]

Sci Rep, 2022
Duan G, Gong H, Chen B, Li X, Pan X, Shi M, Zhang H.   +6 more
europepmc   +1 more source

Heterogeneous melting near the Thwaites Glacier grounding line. [PDF]

Nature, 2023
Schmidt BE, Washam P, Davis PED, Nicholls KW, Holland DM, Lawrence JD, Riverman KL, Smith JA, Spears A, Dichek DJG, Mullen AD, Clyne E, Yeager B, Anker P, Meister MR, Hurwitz BC, Quartini ES, Bryson FE, Basinski-Ferris A, Thomas C, Wake J, Vaughan DG, Anandakrishnan S, Rignot E, Paden J, Makinson K.   +25 more
europepmc   +1 more source