On the significance of requisite criteria in detecting pre-earthquake ionospheric precursors: a case study of the Tohoku earthquake of March 11, 2011

VU Chukwuma, BJ Adekoya, JE Thomas, JB Emah… - Acta Geophysica, 2021 - Springer
In the advent of the Tohoku earthquake (M w 9.1 occurred at 14: 46 LT on March 11, 2011),
the Japan Meteorological Agency issued earthquake early warning announcements to the …

On positive and negative ionospheric storms

V Chukwuma - Acta Geodaetica et Geophysica Hungarica, 2007 - akjournals.com
A study is made of the intense storms of March 13–15, 1989 (D st=− 600nT), October 20–21,
1989 (D st=− 266 nT) and April 1–2, 1973 (D st=− 211 nT) in regards to the appearance of …

Roles of Interplanetary and Geomagnetic parameters in 'intense'and 'very intense'magnetic storms generation and their geoeffectiveness

BO Adebesin - Acta Geodaetica et Geophysica Hungarica, 2008 - Springer
This paper studies the probable roles of interplanetary and geomagnetic parameters in the
generation of 'intense'and 'very intense'magnetic storms as well as the correlation between …

On the variation between D st and IMF B z during 'intense' and 'very intense' geomagnetic storms

BO Adebesin, VU Chukwuma - Acta Geodaetica et Geophysica Hungarica, 2008 - Springer
Intense magnetic storms are dominantly caused by the interplanetary manifestations of fast
coronal mass ejections (CMEs); and are in two forms: the sheath region and the CME ejecta …

[PDF][PDF] A study of intense magnetic storms development (using Dst signature) and its association with magnetic clouds

BO Adebesin - The African Review of Physics, 2009 - lamp.ictp.it
This paper attempts to study the development of intense magnetic storms using storm time
Dst index and its association with magnetic clouds. For the purpose of this work, we have …

On the geomagnetic and ionospheric responses to an intense storm associated with weak IMF Bz and high solar wind dynamic pressure

VU Chukwuma - Acta Geophysica, 2007 - Springer
A study of the geomagnetic storm of July 13–14, 1982, and its ionospheric response is
presented using the low-latitude magnetic index, Dst, and interpreted using solar wind …

Geomagnetic observations and ionospheric response during storm on 14 April 2006

NO Bakare, VU Chukwuma, BJ Adekoya - 94.20. Vv; 94.20. dj, 2010 - nopr.niscpr.res.in
A study of the intense geomagnetic storm on 14 April 2006 has been done using
ionospheric data obtained from ionosonde station located in the American sector. The …

F2 IONOSPHERIC EFFECT ON INTENSE GEOMAGNETIC STORM ASSOCIATED WITH DIFFERENT DRIVERS: MAGNETIC CLOUD AND COMPLEX EJECTA.

NO Bakare - COAST JOURNAL OF THE SCHOOL OF …, 2021 - journals.oaustech.edu.ng
The F2-region response to the intense geomagnetic storm was studied using six (6)
ionospheric stations ranging from high to low latitude. The onset of the geomagnetic storms …

Interplanetary phenomenon, geomagnetic and ionospheric response associated with the storm of January 10-11, 1976

BO Adebesin, VU Chukwuma - Ife Journal of Science, 2008 - ajol.info
This paper attempts to investigate the intense (Dst=-158 nT) magnetic storm of January 10-
11, 1976; in regards to the appearance of positive storm before the beginning of a …

A study of magnetic field (Bz) and ionospheric variation during magnetic activites at low latitude

BO Adebesin, VU Chukwuma, BO Bakare… - Journal of Environmental …, 2007 - ajol.info
A large foF2 data base was collected for the four magnetic storms occurring in January 10,
1976; April 12-13, 1981; October 29, 1973 and July 8, 1975; for the low latitude station of …