Hussein M. Farid

• PhD
• Associate professor at Cairo University

This research is a new addition to the previous work done in Egypt to determine the exact time of the true dawn due to the urgent need of society for that. Twilight observations were carried out by SQM and the naked eye (N.E.) in the high visibility conditions for the morning twilight sky in the time interval (2018-2019) at Fayum in Egypt (29° 17´...

We have studied the variation of the time profile of X-ray emission of solar flares that occurred during the second half of solar cycle 23 (SC 23) and for about the full solar cycle 24 (SC 24) (2002-2018). We define a new index, called the "ratio index" (Rf), for all X-ray solar flares. This index is defined as the ratio of the flare's rising time...

The present work aims to explore the impact of solar Gamma-Ray flares (GRFs), detected by the Fermi-Large Area Telescope (LAT), and their associated X-ray flares (XRFs) on the earth’s lower ionosphere. The data of ionospheric parameter fmin were collected from the Yamagawa mid-latitude ionosonde station in Japan. Because most of the GRFs used in th...

We investigated the relations between the monthly average values of the critical frequency (f0F2) and the physical properties of the coronal mass ejections (CMEs), then we examined the seasonal variation of f0F2 values as an impact of the several CMEs properties. Given that, f0F2 were detected by PRJ18 (Puerto Rico) ionosonde station during the per...

Data for: Association of CMEs and solar flares detected by Fermi γ-ray burst monitor

We have estimated the arrival time of interplanetary coronal mass ejection (ICME) shocks during solar cycle 23 (the period from 1996 to 2007) using the artificial neural network. Under our model, we could match 97% of the listed coronal mass ejection CME-ICME events selected by [Cane and Richardson (2010)] using the initial velocities of the ICME e...

We have studied the impact of Halo-CMEs on the ionospheric critical frequency foF2 during the period 1996-2013. We have correlated the monthly maximum values of foF2 with monthly averages of Halo-CME's energy, mass and speed; we found that the correlation coefficient R is 74%, 52% and 65% respectively. This indicates that the energetic, massive and...

We have studied the impact of CMEs on the ionospheric critical frequency foF2 during the period 1996-2013. We have correlated the monthly maximum values of foF2 with monthly averages of CME’s energy, mass and speed; we found that the correlation coefficient R is 74%, 52% and 65% respectively. This indicates that the energetic, massive and fast CMEs...

The association listing of Coronal Mass Ejection-Storm Sudden Commencement (CME-SSC) events is the aim of this research. Certain criteria have been put to select the CME-SSC pair events automatically. The travel time of the CME shock could be estimated from an empirical equation that depends on spatial, temporal, CME angular width and projection ef...

The North Atlantic Oscillation (NAO) is a climatic phenomenon in the North Atlantic Ocean of fluctuations in the difference of atmospheric pressure at sea level between the Icelandic low and the Azores high. Through fluctuations in the strength of the Icelandic low and the Azores high, it controls the strength and direction of westerly winds and st...

The association listing of Coronal Mass Ejection-Storm Sudden Commencement (CME-SSC) events is the aim of this research. Certain criteria have been put to select the CME-SSC pair events automatically. The travel time of the CME shock could be estimated from an empirical equation that depends on spatial, temporal, CME angular width and projection ef...

The association listing of Coronal Mass Ejection-Storm Sudden Commencement (CME-SSC) events is the aim of this research. Certain criteria have been put to select the CME-SSC pair events automatically. The travel time of the CME shock could be estimated from an empirical equation that depends on spatial, temporal, CME angular width and projection ef...

The association listing of CME-SSC events is the aim of our research, our study is depended on the CME data obtained from SOHO/LASCO CME Catalog (15877 events) and SSC (381 events) from NOAA, during the period 1996-2010. Previous studies created lists manually according to some criteria and conditions. We presented such a condition to select the CM...

The association listing of Coronal Mass Ejection-Storm Sudden Commencement (CME-SSC) events is the aim of this research. Certain criteria have been put to select the CME-SSC pair events automatically. The travel time of the CME shock could be estimated from an empirical equation that depends on spatial, temporal, CME angular width and projection ef...