Results 51 to 60 of about 22,368 (251)
Underwater seismometer validation
Instrumentation viewpoint, 2009 This work verifies and validates the calibration in a marine geophone by means of a hyperbaric chamber before and after the pressure underwater laboratory test. The objective is to characterise the transfer function according to the frequency of coupling between the geophone and the sediment.
Roset Juan, Francesc Xavier +2 more
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A fiber-optic interferometric seismometer
Journal of Lightwave Technology, 1987 A fiber-optic interferometric sensor has been developed which consists of a seismic mass of 520 gm supported by two rubber mandrels, each wound with a single layer of single-mode optical fiber 6.5 m long. One end of each fiber is cleaved to enhance reflection.
Gardner, D.L. +4 more
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Nostradamus: The radar that wanted to be a seismometer [PDF]
Geophysical Research Letters, 2010 Surface waves emitted after large earthquakes are known to induce, by dynamic coupling, atmospheric infrasonic waves propagating upward through the neutral and ionized atmosphere. Those waves have been detected in the past at ionospheric heights using a variety of techniques, such as HF Doppler sounding or GPS receivers.
Philippe Lognonné +4 more
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Seismic Tremors From Sea‐Landfast Ice Interactions Near Utqiaġvik, Alaska
Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.Abstract The mechanical state of Arctic landfast sea ice remains poorly constrained due to limited observations. This study investigates interactions between drifting sea ice and the coastal landfast ice near Utqiaġvik, Alaska by integrating data from broadband seismometer, Distributed Acoustic Sensing, and marine radar.
Gabriel Rocha dos Santos, Tieyuan Zhu
wiley +1 more source
Detection of nanoseismic events related to slope instabilities in the quarry district of Coreno Ausonio (Italy) [PDF]
, 2016 Le cave per l’estrazione di materiale roccioso rappresentano contesti in cui possono aver luogo eventi di instabilità gravitativa causati dalle continue sollecitazioni cui sono soggette le pareti produttive, principalmente connesse alle vibrazioni dovute
FIORUCCI, MATTEO +3 more
core +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
Earth and Space Science, Volume 12, Issue 8, August 2025.Abstract High‐frequency seismic waves are generated by inter‐particle collisions during granular flows travel downslope. However, the accurate estimation of particle impact rates over granular layers remains a challenging issue. Here, controlled laboratory experiments were performed to investigate basal dynamic pressures triggered by the impact of ...
Zheng Chen +4 more
wiley +1 more source
Properties and Dispersal of a Hydrothermal Plume in a Weakly Stratified Under‐Ice Environment
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 8, August 2025.Abstract The Aurora vent field (82°53.83′N, 6°15.32′W) is located in the weakly stratified Arctic Ocean under perennial ice cover at the western edge of the ultraslow‐spreading Gakkel Ridge, the slowest spreading mid‐ocean ridge on Earth. Here, we report data on the dispersal of the proximal hydrothermal plume in this extreme environment.
Maren Walter +11 more
wiley +1 more source
Sensitivity to lunar cycles prior to the 2007 eruption of Ruapehu volcano [PDF]
, 2017 A long-standing question in Earth Science is the extent to which seismic and volcanic activity can be regulated by tidal stresses, a repeatable and predictable external excitation induced by the Moon-Sun gravitational force.
Caudron, Corentin +2 more
core +2 more sources
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