scholarly journals What determines focal depth?

2021 ◽  
Author(s):  
Qiuyun Liu ◽  
Lipeng Liao ◽  
Chanyuk Lam David ◽  
Yuhan Lin ◽  
Man Tang
Keyword(s):  
Potential Energy ◽  
Focal Depth ◽  
Linear Velocity ◽  
Earth Surface ◽  
The Earth ◽  
Two Factors

The interior of the Earth has smaller linear velocity than the Earth surface, but larger inertia due to gravity. This generates longer period of decelerations or accelerations in the interior producing strain with vertical and horizontal components. Faster linear velocity results in larger strain. Focal depth is the compromise of these two factors. Slender potential energy produces focal depth with hundreds of kilometers deep.

scholarly journals The comparison of the divergent and convergent tectonic plates margins seismicity – the case study: Red Sea and Zagros

2020 ◽  
Vol 50 (2) ◽  
pp. 261-285
Author(s):  
Ali AMJADI ◽  
Bahram AKASHE ◽  
Mohammad ARIAMANESH ◽  
Mohsen POURKERMANI
Keyword(s):  
Focal Mechanism ◽  
Red Sea ◽  
Focal Depth ◽  
B Value ◽  
Earth Surface ◽  
Tectonic Plates ◽  
Geometrical Characteristics ◽  
The Earth ◽  
Large Earthquakes

Regarding the seismicity of the Zagros and the Red Sea regions, the present study has investigated and analyzed the seismicity with M ≥ 5 of these regions with obtaining seismicity coefficients, geometrical characteristics including depth, earthquake dispersion and focal mechanism of earthquakes, and their relation to each other. The estimated b-value for these two zones is approximately the same, being equal to ∼1.2. However, the total number of earthquakes in the Zagros is much higher (approximately 5.5 times), when the ratio of small to large earthquakes is about the same amount. In this study, focal depth of more earthquakes occurred and located in the Zagros and Red Sea respectively in depth of 15–20 km and 10–15 km from the earth surface, indicating that the Zagros Crust is thicker than the Red Sea.

Basis for the technique of the external control of the optical equipment for the remote sensing of the Earth surface

1997 ◽  
Vol 3 (3-4) ◽  
pp. 50-53
Author(s):  
O.D. Fedorovskyi ◽  
◽  
V.I. Kononov ◽  
K.Yu. Sukhanov ◽  
◽  
...  
Keyword(s):  
Remote Sensing ◽  
External Control ◽  
Earth Surface ◽  
The Earth

ESTIMATION OF THE EARTH SURFACE TEMPERATURE BY HIMAWARI-8/AHI

2016 ◽  
Vol 72 (2) ◽  
pp. II_1-II_6 ◽  
Author(s):  
Yuuki UCHIDA ◽  
Tomohito ASAKA ◽  
Takashi NONAKA ◽  
Keishi IWASHITA ◽  
Toshiro SUGIMURA
Keyword(s):  
Surface Temperature ◽  
Earth Surface ◽  
The Earth

Technical photography of surface motion

1962 ◽  
Vol 52 (5) ◽  
pp. 1007-1016
Author(s):  
B. Carder ◽  
J. Hefferman ◽  
D. Barnes
Keyword(s):  
New Mexico ◽  
Long Range ◽  
Short Range ◽  
Surface Displacement ◽  
Earth Surface ◽  
Peak Displacement ◽  
Surface Motion ◽  
Target Weight ◽  
The Earth ◽  
Analysis Of Results

abstract Photographic measurements of the earth-surface displacement were made on the gnome event, an underground nuclear detonation near Carlsbad, New Mexico, November 1961. One long range and three short range photo stations were used to provide complementary coverage. Motionless inertia weights were measured against graduated targets rigidly anchored to the surface. The experiment is described in detail including target/weight arrangement, camera specifications, and photo station locations in relation to Surface Zero. Analysis of results from 6 films from close-in stations and one film from the long range station are reported. The peak displacement measured was slightly greater than six feet at a location 106 feet from surface zero.

Pile Capacity in Homogeneous Unsaturated Sand Layer

2011 ◽  
Vol 110-116 ◽  
pp. 13-17
Author(s):  
Anuchit Uchaipichat ◽  
Ekachai Man Koksung
Keyword(s):  
Pile Foundation ◽  
Factor Of Safety ◽  
Matric Suction ◽  
Earth Surface ◽  
Sand Layer ◽  
Pile Capacity ◽  
Natural Soils ◽  
Unsaturated Sand ◽  
The Earth ◽  
Dry Conditions

Generally, pile foundation is typically chosen to support heavy structures. However, the developments of expressions to determine the pile capacity is usually based on fully saturated and completely dry conditions. In fact, almost 40 percent of natural soils on the earth surface are in an unsaturated state. Thus, in this paper, an expression for pile capacity in homogeneous unsaturated sand layer is developed. The simulations using developed expression are performed and discussed. Typical results show that the pile capacity and the factor of safety are affected by matric suction. However, the influence of matric suction may be ignored for a long pile.

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