Results 191 to 200 of about 6,760 (227)
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Correlation of Foreshocks and Aftershocks and Asperities
pure and applied geophysics, 1984A close correlation in spatial distribution of local seismic activity and energy release patterns before and after the 1979 Petatlan, Mexico earthquake suggests heterogeneity within the fault plane of this major low-angle thrust event associated with subduction along the Middle America Trench.
Vindell Hsu +3 more
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Statistical model of earthquake foreshocks
Physical Review A, 1992We propose a statistical model of rupture as a mechanism for the occasionally observed marked increase of seismic activity prior to a great earthquake. The physical ingredients of the model are those of geometrical inhomogeneity and viscoelastic creep.
, Sornette, , Vanneste, , Knopoff
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, 2020
On 4 July 2019, the Ridgecrest earthquake sequence began with a series of foreshocks including an Mw 6.4 event near Searles Valley, California.
C. Milliner, A. Donnellan
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On 4 July 2019, the Ridgecrest earthquake sequence began with a series of foreshocks including an Mw 6.4 event near Searles Valley, California.
C. Milliner, A. Donnellan
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Ion Acceleration by Foreshock Bubbles
Journal of Geophysical Research: Space Physics, 2021Foreshock bubbles (FBs) form as a result of the interaction between solar wind discontinuities and backstreaming ion beams in the foreshock. They are carried by the solar wind in the anti‐sunward direction and are associated with high energy ions.
N. Omidi, Shih-Yan Lee, D. Sibeck
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Advances in Space Research, 1995
An overview of the observations of backstreaming electrons in the foreshock and the mechanisms that have been proposed to explain their properties will be presented. A primary characteristic of observed foreshock electrons is that their velocity distributions are spatially structured in a systematic way depending on distance from the magnetic field ...
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An overview of the observations of backstreaming electrons in the foreshock and the mechanisms that have been proposed to explain their properties will be presented. A primary characteristic of observed foreshock electrons is that their velocity distributions are spatially structured in a systematic way depending on distance from the magnetic field ...
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Foreshock compressional boundary
Journal of Geophysical Research, 2009We employ 2.5‐D electromagnetic, hybrid simulations that treat ions kinetically via particle‐in‐cell methods and electrons as a massless fluid to study the formation and properties of a newly discovered boundary named the foreshock compressional boundary (FCB).
Nojan Omidi, David Sibeck
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MMS observations of wave activity in the particle foreshock bubble foreshock region
2020<p>Foreshock bubbles (FBs) are kinetic transient phenomena formed due to the interaction between IMF discontinuities and backstreaming energetic ions in Earth&#8217;s foreshock region. FBs can be driven by both rotational discontinuities and tangential discontinuities and are typically observed under higher solar wind ...
Mengmeng Wang, Quanqi Shi
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Foreshocks of strong earthquakes
Izvestiya, Physics of the Solid Earth, 2014The specific enhancement of ultra-low-frequency (ULF) electromagnetic oscillations a few hours prior to the strong earthquakes, which was previously mentioned in the literature, motivated us to search for the distinctive features of the mechanical (foreshock) activity of the Earth’s crust in the epicentral zones of the future earthquakes. Activation of
A. V. Guglielmi +3 more
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A study of ULF wave foreshock morphology—I: ULF foreshock boundary
Planetary and Space Science, 1992Abstract We have used ISEE 1 and 2 magnetometer data to determine the forward boundary of the upstream ULF wave foreshock. We first examine the presence and absence of ULF waves immediately upstream from the bow shock. The statistical results show that the ULF foreshock starts at θBn ∼ 50° on the bow shock, and fills the entire upstream region ...
G. Le, C.T. Russell
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1985
ISEE particle and wave data are noted to furnish substantial support for the basic features of the velocity dispersed model at the foreshock boundary that was proposed by Filbert and Kellogg (1979). Among many remaining discrepancies between this model and observation, it is noted that unstable reduced velocity distributions have been discovered behind
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ISEE particle and wave data are noted to furnish substantial support for the basic features of the velocity dispersed model at the foreshock boundary that was proposed by Filbert and Kellogg (1979). Among many remaining discrepancies between this model and observation, it is noted that unstable reduced velocity distributions have been discovered behind
openaire +1 more source