Results 91 to 100 of about 12,094 (271)
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract Analysis of ambient seismic noise is of increasing interest for its potential to monitor aquifers, seismic wave velocity being sensitive to fluctuations of the water table or to pore pressure variations. The correlation with groundwater pressure variations in confined aquifers, which are often strategic, is an open scientific question, as is ...
B. Vittecoq, A. Burtin, J. Fortin
wiley +1 more source
Subduction history of the Caribbean from upper-mantle seismic imaging and plate reconstruction
Nature Communications, 2021 Seismic imaging of subducted plates offers a way to improve plate tectonic reconstructions. Here, Braszus et al. use new ocean-bottom seismometer data from the Lesser Antilles to locate subducted spreading centres and faults thus providing a new ...
Benedikt Braszus +18 more
doaj +1 more source
A Mercury Pendulum Seismometer [PDF]
Geophysical Journal International, 1974 Summary A long-period mercury pendulum seismometer has been developed at the Seismological Laboratory, California Institute of Technology. The devices are presently operational in several locations throughout the world. The instruments exhibit extremely good sensitivity, stability, and signal to noise ratios in the 0.02-0.001 Hz range. Seismic waves
openaire +2 more sources
Mantle Exhumation and Post‐Rift Magmatism at an Oblique Magma‐Poor Continental Margin
Geophysical Research Letters, Volume 52, Issue 7, 16 April 2025.Abstract Continental breakup is a fundamental tectonic process, which leads to seafloor spreading and the generation of oceanic crust. However, the current understanding of continental margins, based largely on 2‐D seismic transects, is inadequate to capture the spatial complexity of crustal evolution.
Jie Chen +3 more
wiley +1 more source
Near Surface Geophysics, Volume 23, Issue 2, Page 105-120, April 2025.Abstract Degradation within a manmade earth embankment structure is often unobservable from the surface. In order to evaluate the structural integrity of earth embankment levees and dams and identify subsurface zones of weakness that may result in the future failures of such structures, various geophysical methods have been proposed as effective ...
Steven J. Maniscalco, John E. Ebel
wiley +1 more source
Monitoring earthquakes with gravity meters
Geodesy and Geodynamics, 2011 Seismic waves from a magnitude 8.3 earthquake in Japan were consistently recorded by five nearly identical gPhone gravity meters in Colorado. Good correlation was also found in the response of two different types of gravity meters and a standard ...
T.M. Niebauer +3 more
doaj +1 more source
Eos, Transactions American Geophysical Union, 1935 This paper discusses the advantages of seismometers that record displacement over instruments that measure velocity or acceleration. It shows that a portable seismometer using changes in capacitance between condenser‐plates to produce proportionate changes of current in an oscillograph has many good characteristics, chief of which are the ease and ...
openaire +2 more sources
Slip‐Tremor Interaction at the Very Beginning of Episodic Tremor and Slip in Cascadia
AGU Advances, Volume 6, Issue 2, April 2025.Abstract In Cascadia, the concomitance of slow slip events (SSE) and tremors during Episodic Tremor and Slip (ETS) episodes is well documented. Brittle tremor patches embedded in the ductile matrix deforming aseismically is the most common concept for the fault structure, but whether tremors and their patches impact the SSE initiation is under debate ...
Yuji Itoh +2 more
wiley +1 more source
, 2018 Accurate determination of the seismometer orientation is a prerequisite for seismic studies including, but not limited to seismic anisotropy. While borehole seismometers on land produce seismic waveform data somewhat free of human-induced noise, they ...
Hobin Lim +3 more
semanticscholar +1 more source
Seismic Wave Recording by 2S-Seismographs [PDF]
arXiv, 1999 Researchers of seismic waves may construct a new seismographic recording adding one seismometer to each component of a conventional seismic station. The two identical conventional seismometers are set up in position of perpendicular and are connected in parallel feeding one recording device (digital or analog).
arxiv