Results 71 to 80 of about 22,871 (194)

Electromagnetic precursors of earthquakes and their recurrence

open access: yesГеофизический 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

Fortelling catastrophes?

open access: yes, 2011
A generic saddle-node bifurcation is proposed to modelize fast transitions of finite amplitude arising in geophysical (and perhaps other) contexts, when they result from the intrinsic dynamics of the system. The fast transition is generically preceded by
Berre, Martine Le, Pomeau, Yves
core   +1 more source

Earthquake recurrence as a record breaking process

open access: yes, 2005
Extending the central concept of recurrence times for a point process to recurrent events in space-time allows us to characterize seismicity as a record breaking process using only spatiotemporal relations among events.
Jörn Davidsen   +4 more
core   +1 more source

Ionospheric evidence of the May 1960 earthquake over Concepción? [PDF]

open access: yesGeofísica Internacional, 2008
For many years relations between seismic activity and associated ionospheric changes have been studied. Particularly, the possibility to identify ionospheric precursors of large earthquakes has been regarded as a specific goal for eventual obvious very ...
M. Stepanova   +3 more
doaj  

Is there accelerated crustal deformation before large earthquakes? A case study of strong intra-plate earthquakes in ChinaKey points

open access: yesEarthquake Science
The existence of a detectable precursory phase of fault slip preceding major earthquakes has been a subject of ongoing debate for decades. A recent study (Bletery and Nocquet, 2023) demonstrated exponential acceleration of fault slip prior to large ...
Chengyang Zhang   +3 more
doaj   +1 more source

On the electric field transient anomaly observed at the time of the Kythira M=6.9 earthquake on January 2006 [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2007
The study of the Earth's electromagnetic fields prior to the occurrence of strong seismic events has repeatedly revealed cases were transient anomalies, often deemed as possible earthquake precursors, were observed on electromagnetic field recordings of ...
M. R. Varley   +3 more
doaj  

SEISMO-ELECTROMAGNETIC PHENOMENA IN TECTONICALLY ACTIVE REGIONS [PDF]

open access: yes, 2010
This work presents a research plan that aims to monitor seismo-electromagnetic signals in seismic active regions. Two effects will be considered: electromagnetic field emissions and radio broadcastings.
Bezzeghoud, M.   +9 more
core  

Evaluation of Proposed Earthquake Precursors

open access: yesEos, Transactions American Geophysical Union, 1991
AGU's Evaluation of Proposed Earthquake Precursors presents the first results of a project carried out by the International Association of Seismology and Physics of the Earth's Interior (IASPEI) to evaluate claims about precursors to earthquakes. Only three of 28 nominations were accepted for the Preliminary List of Significant Precursors that IASPEI ...
openaire   +2 more sources

Precursor-Like Anomalies prior to the 2008 Wenchuan Earthquake: A Critical-but-Constructive Review

open access: yesInternational Journal of Geophysics, 2012
Results published since the last three years on the observations of the precursor-like anomalies before the May 12, 2008, Wenchuan, Ms8.0 earthquake are collected and analyzed.
Tengfei Ma, Zhongliang Wu
doaj   +1 more source

Surface latent heat flux as an earthquake precursor [PDF]

open access: yesNatural Hazards and Earth System Sciences, 2003
The analysis of surface latent heat flux (SLHF) from the epicentral regions of five recent earthquakes that occurred in close proximity to the oceans has been found to show anomalous behavior.
S. Dey, R. P. Singh
doaj  

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