Results 71 to 80 of about 3,946 (197)

Magnetic Signatures of a Plasma Wake Behind the Swarm Satellites

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract This study provides first observational evidence of a plasma wake behind ESA's Swarm satellites, manifesting itself by a brief magnetic field strength spike and bipolar field variations in transverse direction. These magnetic signatures occur only near the dip‐equator where the magnetic declination is close to zero.
Chao Xiong, Xinyi Rang, Hermann Lühr, Fan Yin   +3 more
wiley   +1 more source

Importance of small earthquakes for stress transfers and earthquake triggering

, 2004
We estimate the relative importance of small and large earthquakes for static stress changes and for earthquake triggering, assuming that earthquakes are triggered by static stress changes and that earthquakes are located on a fractal network of ...
Abercrombie, Agnew, Agnès Helmstetter, Console, Das, Davis, Dieterich, Drakatos, Ekström, Felzer, Felzer, Felzer, Felzer, Guo, Hanks, Harris, Harris, Hauksson, Helmstetter, Helmstetter, Helmstetter, Helmstetter, Hergarten, Huc, Hutton, Izenman, Jones, Jones, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kagan, Kilb, King, Marsan, Marsan, Michael, Mikumo, Molchan, Nur, Ogata, Ogata, Papazachos, Parsons, Reasenberg, Reasenberg, Reasenberg, Scholz, Shaw, Shearer, Singh, Solov'ev, Steacy, Stein, Utsu, Utsu, Working Group On California Earthquake Probabilities, Yamanaka, Zeng, Zhuang   +66 more
core   +4 more sources

Structural heterogeneity in the megathrust zone and mechanism of the 2011 Tohoku-oki earthquake (Mw 9.0) [PDF]

, 2011
The great 2011 Tohoku-oki earthquake (Mw 9.0) and its 339 foreshocks and 5,609 aftershocks (9–27 March 2011) were relocated using a three-dimensional seismic velocity model and local P and S wave arrival times.
Hasegawa, Akira, Huang, Zhouchuan, Kanamori, Hiroo, Umino, Norihito, Zhao, Dapeng   +4 more
core   +1 more source

Kinetic aspects of foreshock cavities [PDF]

Geophysical Research Letters, 2006
We have investigated the kinetic signatures within, and at the edges of, a foreshock cavity. Such cavities are believed to be formed when an isolated collection of interplanetary magnetic field lines connect to quasi‐parallel regions of the Earth's bow shock, allowing energetic ions to flow upstream and excavate a local cavity.
Steven J. Schwartz, David Sibeck, Mark Wilber, Karim Meziane, Timothy S. Horbury   +4 more
openaire   +1 more source

19 Clustered Foreshock Sequences Along the San Jacinto Fault Zone: Possible Role of Frictional Heterogeneity in Extended Earthquake Nucleation

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract Laboratory experiments and theoretical models suggest that earthquakes are preceded by extended nucleation phases, perhaps by slow but accelerating slip. However, such nucleation phases are hard to observe before natural earthquakes. Here we identify clustered foreshock sequences that could be nucleation signatures.
Hui Huang, Jessica C. Hawthorne
wiley   +1 more source

Oxygen foreshock of Mars

Planetary and Space Science, 2015
AbstractMars Express (MEX) has operated for more than 10 years in the environment of Mars, providing solar wind ion observations from the Analyzer of Space Plasmas and Energetic Atoms experiment's Ion Mass Analyser (IMA). On 21 September 2008, MEX/IMA detected foreshock-like discrete distributions of oxygen ions at around 1keV in the solar wind ...
Yamauchi, M., Lundin, R., Frahm, R.A., Sauvaud, J.-A., Holmström, M., Barabash, S.   +5 more
openaire   +1 more source

Nucleation and Cascade Features of Earthquake Mainshock Statistically Explored from Foreshock Seismicity

Entropy, 2019
The relation between the size of an earthquake mainshock preparation zone and the magnitude of the forthcoming mainshock is different between nucleation and domino-like cascade models.
Masashi Kamogawa, Kazuyoshi Z. Nanjo, Jun Izutsu, Yoshiaki Orihara, Toshiyasu Nagao, Seiya Uyeda   +5 more
doaj   +1 more source

The Slip Distributions of the 1952 and 2025 Kamchatka Earthquakes From Tsunami Waveforms Recorded Around the Pacific Ocean

Geophysical Research Letters, Volume 53, Issue 8, 28 April 2026.
Abstract The July 2025 Kamchatka earthquake (Mw 8.8) generated Pacific‐wide tsunamis. Inversion of 40 DART bottom pressure records revealed a large (∼9 m) slip at 200–400 km southwest of the epicenter. This model reproduces the local geodetic data, and is similar to other finite fault models based on teleseismic and geodetic data. Inversion of the tide
Yushiro Fujii, Kenji Satake
wiley   +1 more source

Magnitude-Dependent Omori Law: Empirical Study and Theory

, 2004
We propose a new physically-based ``multifractal stress activation'' model of earthquake interaction and triggering based on two simple ingredients: (i) a seismic rupture results from activated processes giving an exponential dependence on the local ...
Ouillon, G., Sornette, D.
core   +1 more source

Nonlinear Waves in the Terrestrial Quasiparallel Foreshock [PDF]

Physical Review Letters, 2016
We study the applicability of the derivative nonlinear Schr dinger (DNLS) equation, for the evolution of high frequency nonlinear waves, observed at the foreshock region of the terrestrial quasi-parallel bow shock. The use of a pseudo-potential is elucidated and, in particular, the importance of canonical representation in the correct interpretation ...
Hnat, B., Kolotkov, D. Y., O'Connell, D., Nakariakov, V. M., Rowlands, G.   +4 more
openaire   +3 more sources