搜索结果: 1-15 共查到“地球物理学 observed”相关记录28条 . 查询时间(0.093 秒)
Nonspecular meteor trail altitude distributions and durations observed by a 50 MHz high‐power radar
durations observed trail altitude distributions
2017/3/22
High‐power large‐aperture (HPLA) radars frequently observe nonspecular meteor trail
echoes that result from plasma turbulence driven by the intense pressure gradients on
the trail edges. This paper ...
3D characteristics of ADCP echo intensity anomaly observed over the Snail, Archean, and Pika hydrothermal vent fields in the South Mariana Trough
South Mariana Trough hydrothermal plume AUV 3D mapping ADCP echo intensity
2017/4/10
We conducted four dives using the Urashima autonomous underwater vehicle (AUV) over three hydrothermal vent
fields (Snail, Archean, and Pika) within the South Mariana Trough in July 2009, and measure...
Long-term geomagnetic changes observed n association with earthquake swarm activities in the Izu Peninsula,Japan
Geomagnetic field tectonomagneticsm earthquake swarm total force
2015/9/28
Anomalous crustal uplift has continued since 1976 in the Izu Peninsula, Japan. Earthquake swarms have also occurred intermittently off the coast of Ito since 1978. Observations of the total intensity ...
On the relationship between the geometrical control of scintillation indices and the data detrending problems observed at high latitudes
ionospheric scintillation GPS scintillation monitors scintillation indices
2015/9/2
The experimental estimate of radio waves scintillation, caused by plasma density irregularities in the ionosphere, is usually attempted by means of scintillation indices which are essentially standard...
Anomalous geoelectrical and geomagnetic signals observed at Southern Boso Peninsula,Japan
ULF electromagnetic environment geoelectrical potential differences direction of signal arrival understanding the preparation process of crustal activity
2015/9/2
Geoelectrical and geomagnetic fluctuations are considered the end product of several geophysical phenomena. In particular these signals measured in seismically active areas can be attributed to stress...
Tidal gravity observations at Mt. Etna and Stromboli: results concerning the modeled and observed tidal factors
Tidal gravity models Tidal loading
2015/9/1
Continuous gravity observations performed in the last few years, both at Mt. Etna and Stromboli, have prompted
the need to improve the tidal analysis in order to acquire the best corrected data for t...
Rapid scenarios and observed intensities
Ground motion Historical seismology Seismic risk Statistical analysis Algorithms and implementation Seismological data
2015/8/26
After a destructive earthquake, national Governments need to know the approximate amount of damage, the number of casualties, and the financial losses as soon as possible. Rapid scenarios are also use...
Attenuation of electromagnetic waves at the frequency ~1.7 kHz in the upper ionosphere observed by the DEMETER satellite in the vicinity of earthquakes
Waves and wave analysis Wave propagation
2015/8/24
The DEMETER satellite was the first satellite specifically dedicated to the recording of electromagnetic phenomena connected with seismic activity. Almost 6.5 years of measurements provide good opport...
Pore formation during dehydration of a polycrystalline gypsum sample observed and quantified in a time-series synchrotron X-ray micro-tomography experiment
polycrystalline gypsum sample Pore formation
2015/1/4
We conducted an in-situ X-ray micro-computed
tomography heating experiment at the Advanced Photon
Source (USA) to dehydrate an unconfined 2.3 mm diameter
cylinder of Volterra Gypsum. We used ...
The lithosphere-asthenosphere boundary observed with USArray receiver functions
lithosphere-asthenosphere boundary observed USArray receiver functions
2015/1/4
The dense deployment of seismic stations so far
in the western half of the United States within the USArray
project provides the opportunity to study in greater detail the
structure of the lithosph...
Pore formation during dehydration of a polycrystalline gypsum sample observed and quantified in a time-series synchrotron X-ray micro-tomography experiment
Pore formation during dehydration a polycrystalline gypsum sample time-series synchrotron X-ray micro-tomography experiment
2015/1/4
We conducted an in-situ X-ray micro-computed tomography heating experiment at the Advanced Photon Source (USA) to dehydrate an unconfined 2.3 mm diameter cylinder of Volterra Gypsum. We used a purpose...
The lithosphere-asthenosphere boundary observed with USArray receiver functions
lithosphere-asthenosphere boundary observed USArray receiver functions
2015/1/4
The dense deployment of seismic stations so far in the western half of the United States within the USArray project provides the opportunity to study in greater detail the structure of the lithosphere...
Crustal velocity structure of the Deccan Volcanic Province, Indian Peninsula, from observed surface wave dispersion
Deccan Volcanic Province Surface waves Crustal structure
2015/8/18
Through inversion of fundamental mode group velocities of Love and Rayleigh waves, we study the crustal and subcrustal structure across the central Deccan Volcanic Province (DVP), which is one of the ...
Decoupling of ground level pressures observed in Italian volcanoes: are they driven by space weather geo-effectiveness?
Atmospheric pressure Space weather Sun storm Volcanoes
2015/8/17
Investigations on correlation drops between near-ground atmospheric pressures measured at sea level and at higher altitudes on Italian volcanoes have been carried out. We looked for perturbations of t...
Description of ionospheric disturbances observed by Vertical Ionospheric Sounding at 3 MHz
Fading fluctuation Ionospheric irregularities Multipath fading Ionograms
2015/8/17
High Frequency radio waves reflected by the ionosphere can provide a relevant amount of information within the composite received signal. The ionosphere is indeed a frequency dispersive, bi-refractive...