Results 31 to 40 of about 3,946 (197)

Ion Acceleration Inside Foreshock Transients [PDF]

Journal of Geophysical Research: Space Physics, 2018
AbstractRecent observations upstream of Earth's bow shock have revealed that foreshock transients can not only accelerate solar wind ions by reflection at their upstream boundaries but may also accelerate ions inside them. Evidence for the latter comes from comparisons of ion spectra inside and outside the cores, and from evidence of leakage of ...
Terry Z. Liu, San Lu, Vassilis Angelopoulos, Yu Lin, X. Y. Wang   +4 more
openaire   +1 more source

Faults Self-Organized by Repeated Earthquakes in a Quasi-Static Antiplane Crack Model [PDF]

, 1995
We study a 2D quasi-static discrete {\it crack} anti-plane model of a tectonic plate with long range elastic forces and quenched disorder. The plate is driven at its border and the load is transfered to all elements through elastic forces. This model can
Sornette, Didier, Vanneste, Christian
core   +5 more sources

Temporal Variations of Earthquake Magnitude‐Frequency Relation in the Source Area of M ≥ 6.0 Earthquakes: A Systematic Survey in Taiwan

Earth and Space Science, 2023
Recent studies in the earthquake magnitude‐frequency relation (b‐value) found that the b‐value can decrease with time before large earthquakes in the source area.
Sean Kuanhsiang Chen, Po‐Yuan Chen, Yih‐Min Wu, Chien‐Chih Chen, Chung‐Han Chan   +4 more
doaj   +1 more source

Are Aftershocks of Large Californian Earthquakes Diffusing? [PDF]

, 2003
We analyze 21 aftershock sequences of California to test for evidence of space-time diffusion. Aftershock diffusion may result from stress diffusion and is also predicted by any mechanism of stress weakening.
Agnès Helmstetter, Bouchaud, Chatelain, Das, Didier Sornette, Dieterich, Fukuyama, Guy Ouillon, Hawkes, Hawkes, Hawkes, Helmstetter, Helmstetter, Helmstetter, Helmstetter, Helmstetter, Helmstetter, Huc, Hudnut, Imoto, Jacques, Kagan, Kagan, Kagan, Kagan, Kagan, King, Lee, Marsan, Marsan, Marsan, Mogi, Noir, Nur, Ogata, Ouchi, Ouillon, Rydelek, Rydelek, Sahimi, Scholz, Shaw, Sornette, Stein, Stein, Tajima, Tajima, Toda, Utsu, Utsu, Wesson, Yamashita   +51 more
core   +7 more sources

Is Earthquake Triggering Driven by Small Earthquakes? [PDF]

, 2002
Using a catalog of seismicity for Southern California, we measure how the number of triggered earthquakes increases with the earthquake magnitude. The trade-off between this relation and the distribution of earthquake magnitudes controls the relative ...
Helmstetter, Agnes
core   +4 more sources

Near-seismic effects in ULF fields and seismo-acoustic emission: statistics and explanation [PDF]

Natural Hazards and Earth System Sciences, 2005
Preseismic intensification of fracturing has been investigated from occurrence analysis of seismo-acoustic pulses (SA foreshocks) and ULF magnetic pulses (ULF foreshocks) observed in Karimshino station in addition to seismic foreshocks.
O. Molchanov, A. Schekotov, M. Solovieva, E. Fedorov, V. Gladyshev, E. Gordeev, V. Chebrov, D. Saltykov, V. I. Sinitsin, K. Hattori, M. Hayakawa   +10 more
doaj  

Extension of Gutenberg-Richter Distribution to Mw -1.3, No Lower Limit in Sight [PDF]

, 2009
With twelve years of seismic data from TauTona Gold Mine, South Africa, we show that mining-induced earthquakes follow the Gutenberg-Richter relation with no scale break down to the completeness level of the catalog, at moment magnitude MW −1.3.
Boettcher, Margaret S, Johnston, Malcolm J, McGarr, Art   +2 more
core   +3 more sources

Relation between stress heterogeneity and aftershock rate in the rate-and-state model [PDF]

, 2006
We estimate the rate of aftershocks triggered by a heterogeneous stress change, using the rate-and-state model of Dieterich [1994].We show that an exponential stress distribution Pt(au) ~exp(-tautau_0) gives an Omori law decay of aftershocks with time ~1/
Agnès Helmstetter, Andrews, Bruce E. Shaw, Cochran, Das, Dieterich, Dieterich, Dieterich, Dieterich, Felzer, Felzer, Felzer, Helmstetter, Helmstetter, Herrero, Ide, Lawson, Marsan, McCloskey, Mikumo, Narteau, Nur, Riele, Ripperger, Schaff, Scholz, Shaw, Toda, Toda, Toda, Ziv, Ziv   +31 more
core   +6 more sources

Interplanetary shocks and foreshocks

, 2023
The 28th IUGG General Assembly (IUGG2023) (Berlin 2023)
Blanco-Cano, X., Trota, D., Hietala, H., Kajdic, P., Rojas-Castillo, D., Dimmock, A., Horbury, T., Vainio, R., Jian, L.   +8 more
openaire   +2 more sources

Comparing foreshock characteristics and foreshock forecasting in observed and simulated earthquake catalogs [PDF]

Journal of Geophysical Research: Solid Earth, 2014
AbstractIn this paper, we compare the empirical results regarding foreshocks obtained from the Japan data with results for synthetic catalogs in order to clarify whether or not the corresponding results are consistent with the description of the seismicity by a superposition of background activity and epidemic‐type aftershock sequence (ETAS) models ...
Yosihiko Ogata, Koichi Katsura
openaire   +1 more source