Role of Equatorial Anomaly in Earthquake time precursive features: A few strong events over West Pacific zone

Minakshi Devi, S. Patgiri, A. K. Barbara, Oyama Koichiro, K. Ryu, V. Depuev, A. Depueva

Research output: Contribution to journalArticle

Abstract

The earthquake (EQ) time coupling processes between equator-low-mid latitude ionosphere are complex due to inherent dynamical status of each latitudinal zone and qualified geomagnetic roles working in the system. In an attempt to identify such process, the paper presents temporal and latitudinal variations of ionization density (foF 2 ) covering 45°N to 35°S, during a number of earthquake events (M > 5.5). The approaches adopted for extraction of features by the earthquake induced preparatory processes are discussed in the paper through identification of parameters like the ‘EQ time modification in density gradient’ defined by δ = (foF 2 max − foF 2 min )∕τ mm , where τ mm – time span (in days) between EQ modified density maximum and minimum, and the Earthquake time Equatorial Anomaly, i.e. EEA, one of the most significant phenomenon which develops even during night time irrespective of epicenter position. Based on the observations, the paper presents the seismic time coupling dynamics through anomaly like manifestations between equator, low and mid latitude ionosphere bringing in the global Total Electron Content (TEC) features as supporting indices.

Original languageEnglish
Pages (from-to)1444-1455
Number of pages12
JournalAdvances in Space Research
Volume61
Issue number6
DOIs
Publication statusPublished - 2018 Mar 15

Fingerprint

Earthquakes
earthquakes
anomalies
anomaly
earthquake
Ionosphere
equators
ionospheres
ionosphere
earthquake event
earthquake epicenter
tropical regions
night
Ionization
ionization
coverings
gradients
Electrons
electrons

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Space and Planetary Science

Cite this

Devi, Minakshi ; Patgiri, S. ; Barbara, A. K. ; Koichiro, Oyama ; Ryu, K. ; Depuev, V. ; Depueva, A. / Role of Equatorial Anomaly in Earthquake time precursive features : A few strong events over West Pacific zone. In: Advances in Space Research. 2018 ; Vol. 61, No. 6. pp. 1444-1455.
@article{69c5dc57e5a645d8b1b34bb4ccc16622,
title = "Role of Equatorial Anomaly in Earthquake time precursive features: A few strong events over West Pacific zone",
abstract = "The earthquake (EQ) time coupling processes between equator-low-mid latitude ionosphere are complex due to inherent dynamical status of each latitudinal zone and qualified geomagnetic roles working in the system. In an attempt to identify such process, the paper presents temporal and latitudinal variations of ionization density (foF 2 ) covering 45°N to 35°S, during a number of earthquake events (M > 5.5). The approaches adopted for extraction of features by the earthquake induced preparatory processes are discussed in the paper through identification of parameters like the ‘EQ time modification in density gradient’ defined by δ = (foF 2 max − foF 2 min )∕τ mm , where τ mm – time span (in days) between EQ modified density maximum and minimum, and the Earthquake time Equatorial Anomaly, i.e. EEA, one of the most significant phenomenon which develops even during night time irrespective of epicenter position. Based on the observations, the paper presents the seismic time coupling dynamics through anomaly like manifestations between equator, low and mid latitude ionosphere bringing in the global Total Electron Content (TEC) features as supporting indices.",
author = "Minakshi Devi and S. Patgiri and Barbara, {A. K.} and Oyama Koichiro and K. Ryu and V. Depuev and A. Depueva",
year = "2018",
month = "3",
day = "15",
doi = "10.1016/j.asr.2018.01.003",
language = "English",
volume = "61",
pages = "1444--1455",
journal = "Advances in Space Research",
issn = "0273-1177",
publisher = "Elsevier Limited",
number = "6",

}

Role of Equatorial Anomaly in Earthquake time precursive features : A few strong events over West Pacific zone. / Devi, Minakshi; Patgiri, S.; Barbara, A. K.; Koichiro, Oyama; Ryu, K.; Depuev, V.; Depueva, A.

In: Advances in Space Research, Vol. 61, No. 6, 15.03.2018, p. 1444-1455.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Role of Equatorial Anomaly in Earthquake time precursive features

T2 - A few strong events over West Pacific zone

AU - Devi, Minakshi

AU - Patgiri, S.

AU - Barbara, A. K.

AU - Koichiro, Oyama

AU - Ryu, K.

AU - Depuev, V.

AU - Depueva, A.

PY - 2018/3/15

Y1 - 2018/3/15

N2 - The earthquake (EQ) time coupling processes between equator-low-mid latitude ionosphere are complex due to inherent dynamical status of each latitudinal zone and qualified geomagnetic roles working in the system. In an attempt to identify such process, the paper presents temporal and latitudinal variations of ionization density (foF 2 ) covering 45°N to 35°S, during a number of earthquake events (M > 5.5). The approaches adopted for extraction of features by the earthquake induced preparatory processes are discussed in the paper through identification of parameters like the ‘EQ time modification in density gradient’ defined by δ = (foF 2 max − foF 2 min )∕τ mm , where τ mm – time span (in days) between EQ modified density maximum and minimum, and the Earthquake time Equatorial Anomaly, i.e. EEA, one of the most significant phenomenon which develops even during night time irrespective of epicenter position. Based on the observations, the paper presents the seismic time coupling dynamics through anomaly like manifestations between equator, low and mid latitude ionosphere bringing in the global Total Electron Content (TEC) features as supporting indices.

AB - The earthquake (EQ) time coupling processes between equator-low-mid latitude ionosphere are complex due to inherent dynamical status of each latitudinal zone and qualified geomagnetic roles working in the system. In an attempt to identify such process, the paper presents temporal and latitudinal variations of ionization density (foF 2 ) covering 45°N to 35°S, during a number of earthquake events (M > 5.5). The approaches adopted for extraction of features by the earthquake induced preparatory processes are discussed in the paper through identification of parameters like the ‘EQ time modification in density gradient’ defined by δ = (foF 2 max − foF 2 min )∕τ mm , where τ mm – time span (in days) between EQ modified density maximum and minimum, and the Earthquake time Equatorial Anomaly, i.e. EEA, one of the most significant phenomenon which develops even during night time irrespective of epicenter position. Based on the observations, the paper presents the seismic time coupling dynamics through anomaly like manifestations between equator, low and mid latitude ionosphere bringing in the global Total Electron Content (TEC) features as supporting indices.

UR - http://www.scopus.com/inward/record.url?scp=85041632210&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85041632210&partnerID=8YFLogxK

U2 - 10.1016/j.asr.2018.01.003

DO - 10.1016/j.asr.2018.01.003

M3 - Article

AN - SCOPUS:85041632210

VL - 61

SP - 1444

EP - 1455

JO - Advances in Space Research

JF - Advances in Space Research

SN - 0273-1177

IS - 6

ER -