Ionospheric perturbations due to earthquakes as determined from VLF and GPS-TEC data analysis at Agra, India

Singh, Dhananjali; Singh, Birbal; Pundhir, Devbrat

doi:10.1016/j.asr.2017.11.017

Cited by 15 publications

(4 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Reports of seismomagnetic effects (Stacey, 1964) and the use of ultra-low frequency (ULF) variations of the magnetic field before, during, and after an earthquake have positive results (Hattori, Han, & Huang, 2013;Takahashi et al, 2007;Johnston, 1997;Park, 1996), unipolar magnetic pulses (Scoville et al, 2015) and, more recently, showing ULF magnetic field bursts containing electromagnetic pulses with a period between 15 and 20 seconds before M6.8 and M8.5 seismic events in April 2012 and September 2013 respectively, unassociated with lightning or magnetic storms (Swati et al, 2020) supporting the theory of ionospheric disturbance by acoustic gravitational waves (Singh et al, 2018).…”

Section: Introductionmentioning

confidence: 73%

Electrical and magnetic data time series’ observations as an approach to identify the seismic activity of non-anthropic origin

Solano¹,

Caneva

Jiménez

et al. 2021

Earth sci. res. j.

View full text Add to dashboard Cite

In this work, the authors tried to identify a possible relationship between electromagnetic signals (EM) and seismic events in the lithospheric system in the central region of Colombia. The data, both seismic records and electromagnetic signals, were taken from the catalog of the Seismological Network of the National University of Colombia (RSUNAL) and the catalog of the National Seismological Network of Colombia (RSNC). The project included the design and instrument testing phases for recording seismic signals, electrical potential variations, and magnetic field variations to try to identify possible relationships between these signals. Possible electromagnetic precursors for seismic events were observed, mainly magnetic disturbances, but it was not possible to locate evident electrical anomalies (Seismic Electric Signals - SES). Thus, although the results are not conclusive, the magnetic disturbances identified deserve further long-term analysis.

show abstract

Section: Introductionmentioning

confidence: 73%

Electrical and magnetic data time series’ observations as an approach to identify the seismic activity of non-anthropic origin

Solano¹,

Caneva

Jiménez

et al. 2021

Earth sci. res. j.

View full text Add to dashboard Cite

show abstract

“…Nevertheless, there have been numerous reports accumulated on the VLF/LF propagation anomalies before major EQs (see a review paper [ 19 ] and references therein, also refer to recent papers [ 20 , 21 , 22 ]) which support the AGW hypothesis of the LAIC process, and we consider that the precursory AGW acts as a responsible agent in the LAIC process.…”

Section: Introductionmentioning

confidence: 82%

Natural Time Analysis of Global Navigation Satellite System Surface Deformation: The Case of the 2016 Kumamoto Earthquakes

Yang

Potirakis

Sasmal

et al. 2020

Entropy

View full text Add to dashboard Cite

In order to have further evidence of the atmospheric oscillation channel of the lithosphere-atmosphere-ionosphere coupling (LAIC), we have studied criticality in global navigation satellite system (GNSS) surface deformation as a possible agent for exciting atmospheric gravity waves (AGWs) in the atmosphere and GNSS fluctuations in the frequency range of AGWs with the use of the natural time (NT) method. The target earthquake (EQ) is the 2016 Kumamoto EQ with its main shock on 15 April 2016 (M = 7.3, universal time). As the result of the application of the NT method to GNSS data, we found that for the one-day sampled GNSS deformation data and its fluctuations in two AGW bands of 20–100 and 100–300 min, we could detect a criticality in the period of 1–14 April, which was one day to two weeks before the EQ. These dates of criticalities are likely to overlap with the time periods of previous results on clear AGW activity in the stratosphere and on the lower ionospheric perturbation. Hence, we suggest that the surface deformation could be a possible candidate for exciting those AGWs in the stratosphere, leading to the lower ionospheric perturbation, which lends further support to the AGW hypothesis of the LAIC process.

show abstract

“…Because of a more significant concentration of electrons, the ionosphere is a worldwide electric current, which is TEC (Total Electron Content, density of electrons in ionosphere). Many natural events, such as dust storms, thunderstorms [5], earthquakes, volcanic activity [6], radioactive gases [7], and solar radiation [8], induce variations in density of TEC. TEC rose during the previous high solar radiation cycle, which occurred in 2014 -2015; during this time, high-energy solar particles made contact with the earth's ionosphere, causing TEC to shift.…”

Section: Introductionmentioning

confidence: 99%

Anomalous Variations in Ionosphere TEC Before the Earthquakes of 2021 in the Different Parts of the Globe

et al. 2023

View full text Add to dashboard Cite

The present article shows the satellite-based TEC data analysis for 6 earthquakes (M ≥ 6.0) from specific parts of the earth that occurred in 2021 during the low solar radiation period. In search of pre-earthquake signatures in the ionosphere, the study of the data of GPS-based TEC before the earthquake is needed. L1 and L2 frequency delays have shown STEC and VTEC formulations for Ionosphere electron density measurements. The TEC data shows unusual behavior from 1 to 30 days before an earthquake. The primary goal of this article is to investigate and establish the correlation of lithosphere atmosphere coupling before earthquakes. Dst and F10.7 solar flux parameters have shown solar radiation. Additionally, TEC data also represented as heat maps to confirm their location at the epicenter. This research might help us understand how ionosphere properties respond to seismic activity in the earth’s crust. HIGHLIGHTS There is a growing interest in studying the seismo-ionospheric relationship today An analysis of ionospheric density changes prior to earthquake is presented in this paper We have observed anomaly in TEC [riot o seismic condition, while There were no changes in solar indices. The results of TEC enhancements led us to believe they were responsible for these high TECs GRAPHICAL ABSTRACT

show abstract

Ionospheric perturbations due to earthquakes as determined from VLF and GPS-TEC data analysis at Agra, India

Cited by 15 publications

References 42 publications

Electrical and magnetic data time series’ observations as an approach to identify the seismic activity of non-anthropic origin

Electrical and magnetic data time series’ observations as an approach to identify the seismic activity of non-anthropic origin

Natural Time Analysis of Global Navigation Satellite System Surface Deformation: The Case of the 2016 Kumamoto Earthquakes

Anomalous Variations in Ionosphere TEC Before the Earthquakes of 2021 in the Different Parts of the Globe

Contact Info

Product

Resources

About