Seismically the study area was considered aseismic till the occurrence of the main shock of 14 November 1981 (MD 5.3) that occurred in Kalabsha area, west of Aswan reservoir. Installation of the telemetered network around the northern part of Aswan reservoir played an important role in monitoring the seismic activity in the area. That activity concentrated in Kalabsha area appears to be from different sources. The seismic activity can be grouped into five different seismic zones clustering in position and depth (A, B, C, D, and E). Earthquakes recorded by Aswan telemetered network with duration magnitude MD ranging from 1.5 to 3.1 representing the different seismic zones have been spectrally analyzed. Source parameters were determined using MAG software program. The seismic moment (M0) ranged from 4.97x10 11 to 1.11x10 14 dyne/cm, the source radii (r) spanned from 91.4 to 312 m, whereas the stress drop (Δσ) varied from 0.57 to 74.55 bar and the seismic energy (E) ranged from 8.78x10 4 to 6.41x10 7 J. The scaling relations between the different parameters such as M0 MD; M0 - Δσ; M0 - corner frequency (ƒo) and moment magnitude (M) - MD were made and the empirical relations were obtained which will help in the fast calculation of the different source parameters for the earthquakes in the region without any need of running any spectral analysis programs.

Seismic moment

Scaling law

Source

Cite

Citations (3)

Estimation of attenuation characteristics of Aswan reservoir region, Egypt

Journal of Seismology (2015)

S. Mukhopadhyay Birinder Pal Singh Haggag H. Mohamed

Coda

Frequency dependence

S-wave

10.1007/s10950-015-9511-2

Cite

Citations (11)

SEISMICITY AND SEISMOTECTONICS OF THE WEST KOM OMBO AREA, ASWAN, EGYPT

Raafat E. Fat-Helbary Haggag H. Mohamed

The study area is located about 40 km north of Aswan City in the Western Desert, between longitude from 32 o to 32.9 o E and latitude from 24.2 o to 24.8 o N. On March 22, 2003 an earthquake (MD 4.0) occurred in the west Kom Ombo area and it was felt in the area and its surroundings. The event was followed by two aftershocks with magnitude 2.7 and 3.0. Due to the importance of Kom Ombo city as a main trade center in Aswan Governorate, in addition to the probability of discovering Oil and Gas in the Kom Ombo area, this study carried out. Rou software program is used to locate the earthquakes of the west Kom Ombo area. The results showed that the spatial distribution of these earthquakes are located roughly in the N-S direction, approximately parallel to the Nile River concordant with the main trend of Gebel el-Barka fault. The frequencymagnitude plot for the data located in the west Kom Ombo area gave a fairly good fit to a line with the form log N = (2.9 ± 0.07) – (0.7 ± 0.04) M. The focal mechanism of the largest earthquake (March 22, 2003) is evaluated by using the polarity of the first arrival P-wave technique. The fault plane solution indicates strike-slip faulting with a normal fault component. The fault plane strikes 355 o and dips 57 o was taken in consideration because it is nearly parallel to Gebel el-Barqa fault and the spatial distribution of earthquakes in the area. The seismic activity in the west Kom Ombo area may be related to the Gebel el-Barka fault that is one of the Western Desert fault systems. The results of this study may be used for seismic hazard analysis for purposes of land use planning and policy-making.

Longitude

Seismotectonics

Focal mechanism

Source

Cite

Citations (3)

A REVIEW OF THE RECENT SEISMIC ACTIVITY IN THE SOUTHERN PART OF EGYPT (UPPER EGYPT)

Haggag H. Mohamed Gaber H. Hassib Sayed A. Dahy E. M. El-Amin

Analyzing the earthquake catalogue of the Upper Egypt area since 1982 revealed some characteristics of the seismic activity in the area. Construction of a seismicity map according to the seismicity level in the Upper Egypt showed 14 seismic zones and that the seismic activity is intense around the strait of the Gulf of Suez, along the Red Sea axis, Abu Dabbab and Aswan area. While the detailed study of Aswan zone showed 8 distinct sub-seismic zones and that the activity is concentrated in and around Gable Marawa area. The b-value was calculated for each seismic zone; it is found that the highest value is in Abu Dabbab area followed by Aswan area. A seismic energy released map of the Upper Egypt was constructed for the period from 1982 to 2006; the map reveals the main active zones with high energy values. The study gives new insight for a better understanding of the seismic activity in the Upper Egypt and helps in the seismic hazard assessment.

Seismic zone

Seismic energy

Source

Cite

Citations (16)