Probabilistic seismic hazard maps for sinai peninsula, egypt. Evaluation of the egyptian seismic code approach to. Induced seismicity potential in energy technologies identifies gaps in knowledge and research needed to advance the understanding of induced seismicity. Instead, prior catalogs must be used to forecast future rates. While the detailed study of aswan zone showed 8 distinct subseismic zones and that the activity is. The seismicity of egypt has been studied by many authors e. Seismicity is the distribution of earthquakes in a given area and their characteristics within a particular region. An updated seismic source model for egypt intechopen. While the information presented on this website is believed to be correct, seaoc oshpd and its sponsors and contributors assume no responsibility or liability for its accuracy.
An active median spreading center has been identified in the red sea south of 22, but from published reports, the northern red sea. Seismicity of egypt the seismicity of egypt is characterized by small to moderate earthquake activities due to the relative motions between the african, arabian and eurasian plates. These decisions must be based on forecasts of future earthquake rates. Cambridge university press 0521020255 the seismicity of egypt, arabia and the red sea. The seismicity of egypt, arabia and the red sea by n. Seismic hazard in egypt is highest at the southern end of the gulf of suez, the northern red sea and around the gulf of aqaba, the location of the active plate boundaries. In this study we computed recent seismicity and present kinematic regime in the northern and middle zones of gulf of suez as inferred from moment tensor settlings and focal mechanism of local earthquakes that happened in this region. The results obtained indicated that the level of seismic hazard is relatively high in densely populated areas, which can affect the socioeconomic development of the country. Seismicity of egypt article pdf available in seismological research letters 762.
Haroun the american university in cairo, egypt abstract the use of the reducedforceamplifieddisplacement method in seismic design provisions, has served the practice well with the benefits of simplicity and smaller resulting crosssections. There also is a concise description of aleatoric inherently random and epistemic knowledgebased uncertainties and their role in hazard assessment. Seismicity and seismic hazard in alexandria egypt and its surroundings article pdf available in pure and applied geophysics 1615. An attempt to estimate seismic hazard in egypt using poisson probabilistic seismicity model was made by elsayed 1996 after the destructive earthquake of 1992 october 12. Recent seismicity data clarify that, all inland seis mic activity in egypt lies conformable over the preex isting ew and wnwese or nwse faults. Pdf the historical earthquakes that have been felt in egypt were compiled from arabic documents and earlier earthquake catalogues. About 83 earthquakes were found during the period from 2200bc to 1899ad. Historical seismicity of egypt article pdf available in acta geodaetica et geophysica hungarica 341.
The seismotectonic sitting of egypt suggests that large earthquakes are possible particularly. The present study is considered as the complement and extension of. The seismicity data were compiled from the egyptian national seismological network database during the period from 2004 to 2011 in an attempt to identify the different seismic source regions. An updated and unified earthquake catalog from 1787 to. The number of annually expected earthquakes with magnitude. Earthquake hazard map showing peak ground accelerations having a 2 percent probability of being exceeded in 50 years, for a firm rock site. Its tectonics is determined by the counterclockwise rotation of the adria microplate and the northnortheast directed movement originating. There is a clear correlation between the principal areas of current geothermal development 26,27 and the seismically ac tive boundaries of the moving segments of lithosphere. National research institute of astronomy and geophysics nriag 11421helwan cairo egypt telephone. Seismicity and focal mechanisms of earthquakes in egypt. It is well known that the northern section of egypt and study area has experienced numerous moderate earthquakes with. The territory of egypt is characterized by a moderate.
The highest seismicity rates are found at the eastern boundaries of egypt, viz. This was not the only destructive earthquake in egypt. Seismicity, the worldwide or local distribution of earthquakes in space, time, and magnitude. Seismicity and focal mechanisms of earthquakes in egypt from 2004. The hazard parameter determination is performed for two study areas. Lombe 6, gadi turyomurugyendo 7, fred alex tugume 7 summary. Pdf earthquakes represent a major natural hazard, potentially resulting in loss of life and economic loss. In earthquake engineeringfrom engineering seismology to optimal seismic design of engineering structures, a. The time distribution of these earthquakes shows that, only seven earthquakes have been reported in the period before christ bc.
Pdf seismicity relocations around the sinai peninsula. Cambridge university press, cambridge, 1994, 181 pp. Deterministic seismic hazard in egypt geophysical journal. The seismic activity of egypt is due to the interaction and the relative motion between. Each earthquake is described as fully as possible from the available data, and is analysed in a geographical and historical context. Pdf present kinematic regime and recent seismicity of.
The seismic activity of egypt is due to the interaction and the relative motion between the plates of eurasia, africa and arabia. This file is printed, checked manually, and corrected and the duplicated events are removed. The historical earthquakes that have been felt in egypt were compiled from arabic documents and earlier earthquake catalogues. Tgs completes 2d seismic survey in red sea off egypt posted.
Introduction in nigeria, seismic events from both historical and instrumental means have been recorded since 1933 2011 adepelumi et, al. Harmonized european standards for construction in egypt. The seismicity of egypt, arabia and the red sea deepdyve. 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. Egypt, arabia, the red sea region and the surrounding areas of libya, sudan and ethiopia are studied from the earliest times to the present day. By continuing to use our website, you are agreeing to our privacy policy. The northern part of egypt plays an important role in both strong motion network have been installed to cover the historical and recent seismicity. Pdf seismicity relocations around the sinai peninsula, northeast of egypt. Although egypt is an area of relatively low to moderate seismicity, it has.
Emsc european mediterranean seismological centre provides real time earthquake information for seismic events with magnitude larger than 5 in the european. Ultimate limit state simplified checks for low seismicity cases ag file. Seismicity and active tectonics of the egyptian red sea. Seismicity of egypt based on the compiled earthquake catalog. Seismic hazard and risk analysis pdf free download. The number of annually expected earthquakes with magnitude 3 is much larger in the gulf of suez, 39. Seismicity and geologic structures indubitable in wadi. The material presented in this web application should not be used or relied upon for any specific application without competent examination and verification of its accuracy, suitability and. The presentday seismicity of egypt has been changed significantly and widespread to include uncommon seismic zones after operating the ensn. Although egypt is an area of relatively low to moderate seismicity, it has experienced some damaging local shocks throughout its history, as well as the effects of larger earthquakes in the hellenic arc and the eastern mediterranean area. Seismic monitoring evolution and extensive seismicity of egypt.
A zoomed image of the northeastern part of the study area, which is seismically most active, is shown in the right. Middle east, north africa, and spain from arabic documents. Seismicity of egypt seismological research letters. The activities then are fitted under the constraints of these common slopes. Although egypt is an area of relatively low to moderate seismicity, it has experienced some damaging local shocks throughout its history, as well as the effects of larger earthquakes in the. Emsc european mediterranean seismological centre provides real time earthquake information for seismic events with magnitude larger than 5 in the european mediterranean area and larger than 7 in the rest of the. The author shows clearly how the key elements seismicity, ground motion models, site hazard, damage and risk. Existing technology does not allow direct prediction of future earthquakes, however. A study on seismicity and tectonic setting in the northeastern part of egypt. Seismic active zones and mechanism of earthquakes in.
In this study, we attempt to delineate the subsurface structures for the tectonic active region of northern nasser lake using integrated interpretation techniques of gravity data with seismicity. The seismicity of egypt is characterized by small to moderate earthquake activities due to the relative motions between the african, arabian and eurasian plates. The map is based on the most recent usgs models for the conterminous u. Threedimensional seismic attenuation tomography of egypt. The seismicity of egypt, arabia and the red sea the seismicity of egypt, arabia and the red sea owen, lewis 19950101 00. Seismicity of hungary print email the carpathian basin is located between the seismically active mediterranean area and the nearly aseismic east european platform. Seismicity and seismic hazard analysis in and around the proposed tushka new city site, south egypt raafat e.
Seismic hazard assessment for the eastern and southern africa region was done using the probabilistic. Increased land subsidence and sealevel rise are submerging egypts nile delta coastal margin abstract egypts nile delta, only 1 m above mean sea level at the mediterranean coast, is subject to uneven rates of submergence. It is one of the service agencies of the department of science and technology. Harmonized european standards for construction in egypt fundamental requirements compliance criteria design verifications. The key basis of earthquake hazard analysis is thus, in a broad sense, the analysis of seismicity bolt, 1978. Due to the intense number f o to occur along the three main active trends. Active tectonics and paleotsunami records of the northern coast of. Seismicity and active tectonics of the egyptian red sea margin and the northern red sea. The seismicity parameters a and b in each seismogenic zone are listed in table 1. It is believed that the geological framework of nigeria is located within. Subsurface structural mapping of northern nasser lake. This is a list of earthquakes in egypt, including earthquakes that either had their epicenter in egypt, or caused significant damage in egypt. Chapola 3, fekadu kebede 4, kuvvet atakan 5, daniel k. The first area, gulf of suez, has higher seismicity level than the second, all other active zones in egypt.
This is a response to several factors leading to increasing land lowering subsidence of the northern delta and. Subsurface structural mapping of northern nasser lake region, aswan, egypt, using bouguer data. Egyptian national seismological network ensn and its. Seismicity records, nigeria, seismographic stations, seismographs, instrumental records. Black dots, red triangles, and stars show the seismicity of egypt egyptian. Abdelmotaal 1 1 aswan earthquake research center, p. The sinai peninsula has a triangular shape between the african and arabian plates and is bounded from the western and eastern borders by the gulf of suez. Pdf seismicity and seismic hazard in alexandria egypt. More specifically, it refers to the measure of the frequency of earthquakes in a regionfor example, the number of earthquakes of magnitude between 5 and 6 per 100 square km 39 square. The seismicity around physical meaning of the bvalue. Density structure and isostasy of the lithosphere in egypt. The earthquake activity and the state of stress in and around egypt will provide an opportunity to evaluate the seismic hazard.
Although egypt is characterized by low seismicity, it has experienced occurring of damaging earthquake effect through its history. Seismicity data sets in order to evaluate the seismic activity in study area and its surroundings, it was necessary to extend knowledge of earthquakes and time of their occurrence. Evaluation of the egyptian seismic code approach to estimation of lateral drift s. Moreover, detailed and reliable information is available for several destructive earthquakes in.