Perturbation Features Imprinted on Ionosphere by Successive Clusters of Strong Earthquakes: Role of Atmospheric Coupling Dynamics

Devi, M.; Barbara, A. K.; Patgiri, S.; Depueva, A. Kh.; Oyama, K.-I.; Depuev, V.; Ruzhin, Yu. Ya.

doi:10.1134/s0016793219080036

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…The change of n being small , Thus a change in RRI/km from the normal-value will increase or decrease the FOV . As an example a modification in RRI by 12 % will modify the effective ER to 8000 km [Devi et al, 2019] , when it is possible to see a satellites from beyond the normal FOV range oblique ray traversing in oblique path through the troposphere. The presence of waves registered only by these satellite in the background of anomalous TEC could thus be identified as of tropospheric origin , in support to observation of gravity waves by SODAR setup of Gauhati.…”

Section: Source Of Origins Of Waves : Discussionmentioning

confidence: 99%

“…Our recent observations on TEC modifications during strong April 2014 EQ of Solomom island [Devi et al ., 2019] lying within the fault zone and equatorial anomaly belt indicate more than 50% enhancement in density prior to the EQ event and these anomalous density are found to be registered by Satellites which are not visible during normal days and came in to the LOS of GPS receiver at GU, prior to EQ. These phenomena are tried to explain through modification imposed on troposphere by EQ preparatory processes.…”

Section: Source Of Origins Of Waves : Discussionmentioning

confidence: 99%

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Atmospheric waves as Earthquake precursive tools in Lithospheric Tropospheric Ionospheric coupling dynamics

Devi¹,

Barbara²,

Patgiri³

et al. 2019

IJEAR

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Amongst a number of precursory features in the atmosphere observed through Electro Magnetic (EM) techniques, the variabilites of the lower and upper atmosphere are considered to have yielded reasonably satisfactory results, though reliabilities as nowcasting are yet to be ascertained . Of recent interest in such studies are the waves and undulations possibly generated by Earth Quake (EQ) preparatory processes. Even with number of studies taken up in relevance to this issue, more inputs are necessary to make comprehensive views of generation process of such waves with special reference to an impending EQ . Under this background the paper presents analysis of Total Electron Content (TEC) and Scintillation from GPS observation at Guwahati in identifying generation of waves prior to an earthquake for realizing Lithosphere -Troposphere -Ionosphere (LTI) coupling dynamical status caused by EQ preparatory processes. The anomalous appearance of satellites from beyond the normal Line of Sight (LOS) prior to an EQ and their positions analyzed through respective azimuthal status ( with PRN in each case) are finally utilized in identifying the sources associated with generation of waves. The role of EQ induced tropospheric parameters as Radio Refractive Index (RRI) and Effective Earth Radius are brought in to the ambit of discussions.

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Section: Source Of Origins Of Waves : Discussionmentioning

confidence: 99%

Section: Source Of Origins Of Waves : Discussionmentioning

confidence: 99%

Atmospheric waves as Earthquake precursive tools in Lithospheric Tropospheric Ionospheric coupling dynamics

Devi¹,

Barbara²,

Patgiri³

et al. 2019

IJEAR

Self Cite

View full text Add to dashboard Cite

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Predicting the Unpredictable: Advancements in Earthquake Forecasting Using Artificial Intelligence and LSTM Networks

Sevim Bilici,

Külahcı,

Bilici

2024

Geomagn. Aeron.

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Earthquakes, Solar Activity, and Background Atmosphere: in search of their association

Devi

Das

Medhi

et al. 2023

Preprint

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The role of solar activity in the growth of an earthquake (EQ) is the topic of study here, focussing on the correlation & distribution function between global EQ events of M ≥ 4.5 and solar parameters covering seven cycles from 18 to 24. The analysis modes are in two steps: (i) EQ events in a total of all cycles taken under study and solar role on their growth; and (ii) EQ events filtered for a High Solar Active (HSA) and a Low Solar Active (LSA) years for each individual cycle & the respective contribution of solar strength to their occurrences. The paper presents the observation by drawing a relation between EQ event ratio during LSA and HSA year, i.e., EQLSA/EQHSA with the corresponding Rz ratio of the years, an approach adopted to reduce any bias/errors that arise on availability of more EQ data as year advances. The analysis offers a negative cum complex distribution with more EQ cases at 60–70% below the peak Rz when strong solar ambiances are observed to inhibit the growth of severe EQ events. The overall correlation analyses between Rz, geomagnetic indices like Kp/DST, and EQ-events of different magnitudes also provided a conclusion that solar ambiances play a complicated role in the growth process of an EQ. These observations are discussed by invoking the Forbush effect along with the possible contribution of atmospheric variabilities like global temperature, lithosphere heat content, and anthropogenic components.

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Perturbation Features Imprinted on Ionosphere by Successive Clusters of Strong Earthquakes: Role of Atmospheric Coupling Dynamics

Cited by 3 publications

References 25 publications

Atmospheric waves as Earthquake precursive tools in Lithospheric Tropospheric Ionospheric coupling dynamics

Atmospheric waves as Earthquake precursive tools in Lithospheric Tropospheric Ionospheric coupling dynamics

Predicting the Unpredictable: Advancements in Earthquake Forecasting Using Artificial Intelligence and LSTM Networks

Earthquakes, Solar Activity, and Background Atmosphere: in search of their association

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