Misclassified nonearthquake seismic events like quarry blasts can contaminate the earthquake catalog. The local earthquakes sometimes have similar features as the quarry blasts, which makes manual discrimination difficult and unreliable.... more
Misclassified nonearthquake seismic events like quarry blasts can contaminate the earthquake catalog. The local earthquakes sometimes have similar features as the quarry blasts, which makes manual discrimination difficult and unreliable. Thus, we propose to use the compact convolutional transformer (CCT) and capsule neural network to discriminate between earthquakes and quarry blasts. First, we extract 60 s three-channel seismograms, that is, 10 and 50 s before and after the P-wave arrival time. Then, we transform the time-series data into a time–frequency domain (scalogram) using the continuous wavelet transform. Afterward, we utilize the CCT network to extract the most significant features from the input scalograms. The capsule neural network is utilized to extract the spatial relation between the extracted features using the routing-by-agreement approach (dynamic routing). The capsule neural network extracts different digit vectors for the earthquake and the quarry blast classes,...
Research Interests:
Seismic microzoning is the process of mapping out and comprehending the differences in ground motion due to earthquakes in a certain location. Accurate seismic microzoning is vital for the development and safety of buildings and... more
Seismic microzoning is the process of mapping out and comprehending the differences in ground motion due to earthquakes in a certain location. Accurate seismic microzoning is vital for the development and safety of buildings and infrastructure in earthquake-prone locations. In this work, we present the application of microtremors, multichannel analysis of surface and machine learning approaches for seismic microzoning at Benban Solar Park in Aswan, Egypt. The findings of the investigation indicated that the ground at Benban Solar Park was generally stiff, with certain regions having stronger stiffness and damping qualities than others. The data also indicated variances in the ground conditions at various sites inside the solar park, with certain regions having a greater risk of ground motion due to earthquakes. Overall, the combination of microtremors, multichannel analysis, and machine learning has shown to be an excellent strategy for correctly and effectively mapping out the grou...
Research Interests:
Cement industry is one of the strategic sectors in Egypt. In most cases, cement factories are using explosives to obtain the materials needed for the industry. Such activities pose threats to the surrounding environment. The threats are... more
Cement industry is one of the strategic sectors in Egypt. In most cases, cement factories are using explosives to obtain the materials needed for the industry. Such activities pose threats to the surrounding environment. The threats are more serious when the quarries are located near to a strategic site. The New Administrative Capital (NAC) is one of the leading development projects in Egypt that happen to occur close to some cement quarries that use explosions to obtain the raw materials. Possible unfavorable effects are expected on the buildings and projects at NAC. To evaluate these effects and to propose measures to ensure the safety of NAC structures, the present work was carried out. Threats expected are due to both ground motion and air over pressure. The methodology adopted in the study was based on monitoring the explosions, ground motions, and air over pressure. The monitoring was conducted using temporary arrays that were deployed in the explosion day. The time period req...
Research Interests:
We analyzed 3,069 seismic signals from 413 events (112 explosions and 301 shallow earthquakes, depths
Research Interests:
Research Interests:
Research Interests:
Quiescent faults may be capable of creating catastrophic earthquakes in locations with moderate and/or low seismic activity, such as Egypt. This study combines structural, remote sensing (RS), geophysical, and seismic activity data to... more
Quiescent faults may be capable of creating catastrophic earthquakes in locations with moderate and/or low seismic activity, such as Egypt. This study combines structural, remote sensing (RS), geophysical, and seismic activity data to examine and analyze the relationship between tectonic structures and seismotectonic activity in Egypt. In a new seismo-lineaments map of Egypt, tectonic lineaments of the Egyptian mainland were delineated and classified. The database contains 8000 lineaments that were divided into distinct geographical zones using statistical analysis and general features. Delineated lineaments were integrated with digitized geological and geophysical surface and subsurface faults and geographic information systems (GIS) processing techniques were applied to produce 4249 faults. The spatial distribution of seismic activity was determined to extract 1968 competent faults out of 4249 capable faults (i.e., greater than 10 km and suitably orientated concerning the existing...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Gulf of Suez area which characterized by a moderate seismic activity is consider as a very important area in Egypt. Nearly 75% of the national oil production is covered from this area. Seismic hazard (both proba- bilistic and... more
Gulf of Suez area which characterized by a moderate seismic activity is consider as a very important area in Egypt. Nearly 75% of the national oil production is covered from this area. Seismic hazard (both proba- bilistic and deterministic) was carried out to study the possibility of earthquake damage in the area; a new seismic model was used taking into account the seismo-tectonic framework of the region. The hazard calculations utilized at strength and ductility level pe- riods at the whole area of the Gulf of Suez. Fundamen- tally, the hazard calculations were performed at bedrock conditions, and the spectrum was estimated over the period range of 0.001–12 s. At Abou Zeniama area, where many oil platforms exist, the hazard was calcu- lated at the sea floor, at depth 4.7 m and at depth 26.0 m. The maximum spectral accelerations at strength level earthquakes (SLEs) are found to be 0.260 (g), 0.203 (g), and 0.156 (g) for 90.48% chance, of non-exceedance in 50 years (return period 500 year) at sea floor, at depth
4.7 m and at depth 26 m, respectively. While the ductil- ity level earthquake (DLE) are found to be 0.30 (g), 0.23 (g), and 0.18 (g) for 95.12% chance of non-exceedance in 50 years (return period 1000 year) at sea floor, at depth 4.7 m, and at depth 26 m, respectively. The
deterministic hazard calculation was estimated at 50th and 84th percentile levels for the median peak ground acceleration. The study target initiated from the impor- tance of studying the seismic hazard, SLE, and DLE in the area which contain most of the Egyptian oil industry with many off shore platforms.
4.7 m and at depth 26 m, respectively. While the ductil- ity level earthquake (DLE) are found to be 0.30 (g), 0.23 (g), and 0.18 (g) for 95.12% chance of non-exceedance in 50 years (return period 1000 year) at sea floor, at depth 4.7 m, and at depth 26 m, respectively. The
deterministic hazard calculation was estimated at 50th and 84th percentile levels for the median peak ground acceleration. The study target initiated from the impor- tance of studying the seismic hazard, SLE, and DLE in the area which contain most of the Egyptian oil industry with many off shore platforms.
Strong ground shaking during earthquakes can greatly affect the ancient monuments and subsequently demolish the human heritage. On October 12th 1992, a moderate earthquake (Ms = 5.8) shocked the greater Cairo area causing widespread... more
Strong ground shaking during earthquakes can greatly affect the ancient monuments and subsequently demolish the human heritage. On October 12th 1992, a moderate earthquake (Ms = 5.8) shocked the greater Cairo area causing widespread damages. Unfortunately, the focus of that earthquake is located about 14 km to the south of Zoser pyramid. After the earthquake, the Egyptian Supreme council of antiquities issued an alarm that Zoser pyramid is partially collapsed and international and national efforts are exerted to restore this important human heritage that was built about 4000 years ago. Engineering and geophysical work is thus needed for the restoration process. The definition of the strong motion parameters is one of the required studies since seismically active zone is recorded in its near vicinity. The present study adopted the stochastic method to determine the peak ground motion (acceleration, velocity and displacement) for the three largest earthquakes recorded in the Egypt’s s...
Research Interests:
Site investigation studies provide the basic soil and engineering properties, which usually determined using many investigations as standard penetration test, cone penetration test, and multichannel analysis of surface wave (MASW), to... more
Site investigation studies provide the basic soil and engineering properties, which usually determined using many investigations as standard penetration test, cone penetration test, and multichannel analysis of surface wave (MASW), to identify and evaluate a potential hazard. The horizontal to vertical spectral ratio (HVSR) analysis method is a tool based on the spectral analyses of recorded ambient noise; it is widely used to estimate site effect parameters (fundamental frequency and the associated soil amplification), and many surveys using this technique to study the site effect have provided convincing results. Saqqara pyramid lies to the southwest of Cairo near the epicenter of Cairo earthquake that happened on 12 October 1992. The pyramid is severely damaged by the earthquake with epicenter at about 14 km away; as a result, numerous efforts are exerted to restore the pyramid and to prevent it from total collapse. The current work is motivated by such efforts with focus on the ...
Research Interests:
Research Interests:
Research Interests:
ABSTRACT
Research Interests:
Abstract Determination of earthquake magnitude is of great importance for quantitative seismological hazard studies. Since no local magnitude scale has been developed for the seismic network of the Sultanate of Oman, the present work is... more
Abstract Determination of earthquake magnitude is of great importance for quantitative seismological hazard studies. Since no local magnitude scale has been developed for the seismic network of the Sultanate of Oman, the present work is aiming towards developing the first local magnitude scale for earthquakes that occur in and around the Sultanate of Oman. Currently, the EarthquakeMonitoring Center (EMC) in Oman uses the Southern California formula for ML calculations; the calculated values of local magnitudes are not comparable to the average magnitude calculated by the international centers (e.g., ISC and NEIC). In many cases, they show clear underestimation in magnitude for the local and regional distance events compared with magnitude values published by the international centers. A database of 424 simulated Wood– Anderson horizontal amplitudes of 55 events recorded by 9 very broadband stations, available since 2011, is built. All of the available events are located in northern ...