Results 51 to 60 of about 1,163,794 (200)

Negative Anomalies of the Earth’s Electric Field as Earthquake Precursors

Géosciences, 2019
Anomalies of the electric field potential gradient have been observed in the near-ground air before earthquakes in different regions of the world. Such anomalies are likely caused by radon air ionization.
S. Smirnov
semanticscholar   +1 more source

Studies on earthquake precursors in China: A review for recent 50 years

, 2017
Since the 1960s, China has been conducting a persistent and systematic observation and monitoring experiment to falsify the hypothesis of premonitory anomalies and the predictability of earthquakes and the application of the assessment of time-dependent ...
Fu-qiong Huang, Mei Li, Yuchuan Ma, Yanyan Han, Lei Tian, Wei Yan, Xiaofang Li   +6 more
semanticscholar   +1 more source

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

Discussion on telluric field and seismic activity in Central Greece

Annals of Geophysics, 2000
Two stations were installed in the Southeastern Thessaly basin (Central Greece), recording the geomagnetic and telluric fields from 1993 to 1996. The aim was to detect long-term abnormal changes of the telluric field, which were possibly related to ...
J. Zlotnicki, G. N. Tsokas, G. Vargemezis   +2 more
doaj   +1 more source

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

Seismic velocity precursors to the 2016 Mw 6.5 Norcia (Italy) earthquake

Geology, 2020
Earthquakes occur as the result of long-term strain accumulation on active faults and complex transient triggering mechanisms. Although laboratory experiments show accelerating deformation patterns before failure conditions are met, imaging similar ...
C. Chiarabba, P. Gori, M. Segou, M. Cattaneo   +3 more
semanticscholar   +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

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

Detecting Total Electron Content Precursors Before Earthquakes by Examining Total Electron Content Images Based on Butterworth Filter in Convolutional Neural Networks

IEEE Access, 2020
Daily total electron content (TEC) images created by splitting TEC maps for three time periods from September 1 to 24, 1999; from February 1 to 24, 2003; and from May 1 to 24, 2003 (Taiwan Standard Time [TST]) as training images (inputs) were used to ...
Jyh-Woei Lin, Juing-Shian Chiou
doaj   +1 more source