Results 81 to 90 of about 1,026,033 (242)

The investigation of electromagnetic precursors to earthquakes in Armenia

Annals of Geophysics, 1997
The present work provides a sufficient theoretical substantiation of the anomalous distribution for Very-Low-Frequency (VLF) radio waves which is observed for all radio routes controlled by the National Survey for Seismic Protection (NSSP) of the ...
M. Babayan, S. Kalinin, A. Sahakian, A. Mouradian, S. Balassanian, A. Pogossian   +5 more
doaj   +1 more source

Correlations between Earthquake Properties and Characteristics of Possible ULF Geomagnetic Precursor over Multiple Earthquakes

Universe, 2021
In this study, we improved and adapted existing signal processing methods on vast geomagnetic field data to investigate the correlations between various earthquake properties and characteristics of possible geomagnetic precursors.
Khairul Adib Yusof, Mardina Abdullah, Nurul Shazana Abdul Hamid, Suaidi Ahadi, Akimasa Yoshikawa   +4 more
doaj   +1 more source

Dragon-kings: mechanisms, statistical methods and empirical evidence

, 2012
This introductory article presents the special Discussion and Debate volume "From black swans to dragon-kings, is there life beyond power laws?" published in Eur. Phys. J. Special Topics in May 2012.
A. Akaev, A. Helmstetter, A. Helmstetter, A. Johansen, A. Johansen, A. Johansen, A. Johansen, A. Johansen, A. Johansen, A. L’vov, A. Mignan, A. Sornette, A.T.Y. Lui, B. Voight, B. Voight, C. Ancey, C. Vanneste, C. Vauge, C.G. Bufe, C.G. Sammis, C.G. Sammis, C.J. Allègre, D. Amitrano, D. Plenz, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Sornette, D. Vere-Jones, D.D. Bowman, D.D. Jackson, D.P. Schwartz, F.P. Schoenberg, G. Ouillon, G. Ouillon, G. Ouillon, G. Ouillon, G. Pruessner, G. Zöller, H. Nechad, H. Saleur, I. Main, I. Osorio, J. Janczura, J. Laherrère, J. Schmittbuhl, J. Schmittbuhl, J.-C. Anifrani, J.-L. Cabrera, J.C. Jaume, J.L. Cardy, J.M. Carlson, J.V. Andersen, K. Ide, L. de Arcangelis, L. Gil, L. Lamaignère, L.-E. Cederman, L.R. Sykes, M. Golosovsky, M. Mitzenmacher, M. Scheffer, M. Süveges, M.E.J. Newman, M.J. Alava, M.K. Sachs, M.R. Evans, M.R. Evans, N. Akhmediev, N. Fraysse, N.F. Johnson, O. Peters, P. Bak, P. Bialas, P. Jögi, P. Shebalin, P.J. Reynolds, R. Burridge, R.F. Smalley, S. Hergarten, S.C. Chapman, S.C. Chapman, S.G. Wesnousky, S.G. Wesnousky, S.P. Nishenko, S.P. Nishenko, T. Werner, V. Dakos, V.F. Pisarenko, V.F. Pisarenko, V.F. Pisarenko, V.I. Yukalov, V.I. Yukalov, W.R. McCann, X. Lei, X. Lei, Y. Huang, Y. Malevergne, Y.-F. Rong, Y.Y. Kagan, Z.-Q. Jiang   +108 more
core   +1 more source

Diurnal and semidiurnal cyclicity of Radon (222Rn) in groundwater, Giardino Spring, Central Apennines, Italy [PDF]

, 2018
Understanding natural variations of Rn (222Rn) concentrations is the fundamental prerequisite of using this radioactive gas as a tracer, or even precursor, of natural processes, including earthquakes. In this work, Rn concentrations in groundwater were
Barberio, MARINO DOMENICO, Barbieri, Maurizio, Billi, Andrea, Devoti, Roberto, Doglioni, Carlo, Gori, Francesca, Petitta, Marco, Riguzzi, Federica, Rusi, Sergio   +8 more
core   +2 more sources

Preseismic Fault Creep and Elastic Wave Amplitude Precursors Scale With Lab Earthquake Magnitude for the Continuum of Tectonic Failure Modes

Geophysical Research Letters, 2020
Tectonic faults fail in a continuum of modes from slow earthquakes to elastodynamic rupture. Precursory variations in elastic wavespeed and amplitude, interpreted as indicators of imminent failure, have been observed in limited natural settings and lab ...
S. Shreedharan, D. C. Bolton, J. Rivière, C. Marone   +3 more
semanticscholar   +1 more source

Configurational Energy as a Microstructural Descriptor of Failure Precursors in 2D Frictional Granular Materials

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Localized deformation in dense granular materials, often culminating in the formation of shear bands, is a key failure mechanism in geotechnical and material systems. However, predicting the onset of such localization remains a fundamental challenge due to the system's inherent inelasticity and microstructural complexity.
Zhennan Zhu, Francois Nicot, Antoine Wautier, Klaus Regenauer‐lieb, Manman Hu   +4 more
wiley   +1 more source

Electromagnetic precursors of earthquakes and their recurrence

Геофизический журнал, 2014
Analysis of the electromagnetic activity of aftershocks, which epicenters are located close to each other, was carried out using the data recorded by Borok and College Geophysical Observatories.
B. V. Dovbnya
doaj   +1 more source

Critical features in electromagnetic anomalies detected prior to the L'Aquila earthquake

, 2009
Electromagnetic (EM) emissions in a wide frequency spectrum ranging from kHz to MHz are produced by opening cracks, which can be considered as the so-called precursors of general fracture.
Amitrano, Bahat, C. Nomicos, Contoyiannis, Contoyiannis, Contoyiannis, Contoyiannis, Contoyiannis, Contoyiannis, Diakonos, Eftaxias, Eftaxias, Eftaxias, Eftaxias, Eftaxias, Enescu, G. Antonopoulos, Henegham, Herrmann, J. Kopanas, K. Eftaxias, Kalimeri, Kapiris, Karamanos, Koulouras, Kuksenko, L. Contoyianni, Papadimitriou, Pingel, Pulinets, Sornette, Turcotte, Uyeda, Y.F. Contoyiannis   +33 more
core   +1 more source

In Situ Growth of 2D Perovskite Nanocrystals to Induce β–Phase of PVDF for Piezoelectric Nanogenerators with Ultra‐High Output Voltage

Small, EarlyView.
In situ grown 2D perovskite nanocrystals embedded in PVDF enable flexible piezoelectric nanogenerators with greatly enhanced β‐phase content and a high d33∗${\mathrm{d}}_{33}^{\mathrm{*}}$ of 35.16 pm/V. The devices deliver up to 66.54 V, exhibit light‐enhanced piezoelectricity, and maintain durability over 12000 cycles, offering a stable energy source
Yang Yang, Jordan Cosgrove, Minh Tam Hoang, Mahesh Yashavant Chougale, Parth Pandit, Wei‐Hsun Chiu, Wenzhong Ji, Teng Lu, Ajay K. Pandey, Yun Liu, Deepak Dubal, Hongxia Wang   +11 more
wiley   +1 more source

Investigating ultra-low frequency emissions and total electron content anomalies as earthquake precursors in Sumatra (2019–2020)

Kuwait Journal of Science
Ultra-low frequency (ULF) emissions and total electron content (TEC) anomalies are potential earthquake precursors for short-term earthquake prediction.
Muhammad Hamidi, Suaidi Ahadi, Vira Friska, Marzuki Marzuki   +3 more
doaj   +1 more source