Results 71 to 80 of about 811 (208)

Subtle relict channels associated with large dolines in an area formerly beneath the Laurentide Ice Sheet, northern Ohio, USA

Boreas, Volume 54, Issue 4, Page 567-589, October 2025.
Low‐relief dry channels appear out of place across a glaciated karst landscape in northern Ohio. Channels are only a few metres deep cut into limestone and draped with a veneer of till. Several hypotheses are proposed for explaining the channels. Low‐relief dry channels are observed across the Bellevue‐Castalia Karst Plain of north‐central Ohio, USA ...
Timothy G. Fisher, Douglas J. Aden, Brittany D. Parrick, Kennedy O. Doro, Ira D. Sasowsky, Tyler A. Norris, Giorgi Chartolani   +6 more
wiley   +1 more source

Combining 3‐D Deep Electrical Resistivity Tomography With Magnetic Surveys to Investigate Complex Tectonic Basins: A Case Study From the Central Apennines Seismic Belt (Italy)

Tectonics, Volume 44, Issue 9, September 2025.
Abstract We use an innovative geophysical approach to reconstruct the deep structure of Campo Felice, an important extensional basin in the central Apennines (Italy) where active crustal extension is accommodated by normal faults capable of generating earthquakes of magnitude MW 6+.
V. Sapia, F. Villani, L. Improta, F. Fischanger, P. M. De Martini, V. Romano, V. Materni, P. Baccheschi, A. Smedile, I. Nicolosi, L. Minelli, F. D’Ajello Caracciolo, R. Carluccio, S. Maraio, G. Di Giulio, L. Ruggiero, A. Sciarra, D. Pantosti, M. Pischiutta, T. Ricci, R. Civico, M. Vassallo, C. A. Brunori, M. Lupi   +23 more
wiley   +1 more source

Site characterization of Sikkim Himalaya using HVSR

Seismica
The northeastern state of Sikkim lying in central segment of the Himalayan orogen is a seismically active region which was plagued by the recent 2011 Mw6.9 earthquake. Analysis of local earthquakes recorded at the recently deployed seismic network of 27
Mita Uthaman, Chandrani Singh, Arun Singh   +2 more
doaj   +1 more source

Sediment Thickness Estimation in Serpong Experimental Power Reactor Site Using HVSR Method

Jurnal Pengembangan Energi Nuklir, 2020
A study about sediment thickness mapping was conducted in Serpong Experimental Power Reactor Site. This reactor is planned to be built in a high seismic activity area. Sediment thickness is one of many factors that could affect the site response. A high sediment deposit could amplify and prolong the earthquake waves.
Theo Alvin Ryanto, Eko Rudi Iswanto, Yuni Indrawati, Abimanyu BW Setiaji, Hadi Suntoko   +4 more
openaire   +2 more sources

Quantifying Groundwater Response and Uncertainty in Beaver‐Influenced Mountainous Floodplains Using Machine Learning‐Based Model Calibration

Water Resources Research, Volume 61, Issue 9, September 2025.
Abstract Beavers (Castor canadensis) alter river corridor hydrology by creating ponds and inundating floodplains, and thereby improving surface water storage. However, the impact of inundation on groundwater, particularly in mountainous alluvial floodplains with permeable gravel/cobble layers overlain by a soil layer, remains uncertain.
Lijing Wang, Tristan Babey, Zach Perzan, Sam Pierce, Martin Briggs, Kristin Boye, Kate Maher   +6 more
wiley   +1 more source

Evaluating Seismic Ambient Noise Techniques for Detecting Ice‐Bearing Rocks on the Moon

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract One of the primary objectives of upcoming lunar missions is to locate ice‐bearing rocks at the South Pole. While evidence for their presence exists, the exact distribution and quantity remain uncertain. In this study, we evaluate the potential of seismic ambient noise techniques—including seismic interferometry, H/V spectral ratios ...
S. Keil, M. Schimmel, H. Igel
wiley   +1 more source

Systematic assessment of nonlinear soil behavior at KiK‐net sites in Japan: Thresholds and controlling site factors

Earthquake Spectra, Volume 41, Issue 3, Page 2278-2310, August 2025.
We address two open questions concerning nonlinear soil behavior in a seismic hazard and risk context; (1) which site proxies can be used to predict and map nonlinear site amplification? (2) At which level of ground‐motion intensity should such nonlinear models be considered?
Karina Loviknes, Paolo Bergamo, Donat Fäh, Fabrice Cotton   +3 more
wiley   +1 more source

HVSR recording duration for regolith sites: an experimental approach

, 2015
The application of the horizontal vertical spectral ratio (HVSR) technique using microtremor measurement to quantify the natural period of sites in urban areas is widely used around the world. However, this technique is still under development in regions
Griffith, M., Setiawan, B., Jaksa, M., Love, D.   +3 more
core  

Seasonal variations in amplitudes and resonance frequencies of the HVSR amplification peaks linked to groundwater

, 2021
International audienceFollowing the installation of a temporary seismological network in western Greece north of the Gulf of Patras, we determined the quality of the sites of each of the 10 stations in the network.
Lefils, Valentine, Briole, Pierre, Sokos, Efthimios, Rigo, Alexis   +3 more
core   +1 more source

Determining Soft Layer Thickness Using Ambient Seismic Noise Record Analysis in Kota Baru, South Lampung

Makara Journal of Science, 2019
The local site effect of an earthquake can be calculated through an analysis of short period ambient noise, known as microtremors. The fundamental frequency and amplification factors can be identified by analyzing microtremors using the Horizontal to ...
Vico Luthfi Ipmawan, Ikah N. P. Permanasari, Rahmat Nawi Siregar   +2 more
doaj   +1 more source