عنوان المقالة:تصنيف جديد محدث للهزات الأرضية الضحلة اعتمادا على نمط التصدع New Updated Classification of Shallow Earthquakes Based on Faulting Style
عماد عبد الرحمن محمد صالح الهيتي | Emad Andulrahman Mohammed Salih Al-Heety | 4252
نوع النشر
مجلة علمية
المؤلفون بالعربي
عماد عبد الرحمن محمد صالح الهيتي
المؤلفون بالإنجليزي
Emad Abulrahman Mohammed Salih Al-Heety
الملخص الانجليزي
Earthquakes occur on faults and create new faults. They also occur on normal, reverse and strike-slip faults. The aim of this work is to suggest a new unified classification of Shallow depth earthquakes based on the faulting styles, and to characterize each class. The characterization criteria include the maximum magnitude, focal depth, b-constant value, return period and relations between magnitude, focal depth and dip of fault plane. Global Centroid Moment Tensor (GCMT) catalog is the source of the used data. This catalog covers the period from Jan.1976 to Dec. 2017. We selected only the shallow (depth less than 70kms) pure, normal, strike-slip and reverse earthquakes (magnitude ≥ 5) and excluded the oblique earthquakes. The majority of normal and strike-slip earthquakes occurred in the upper crust, while the reverse earthquakes occurred throughout the thickness of the crust. The main trend for the derived b-values for the three classes was: b normal fault>bstrike-slip fault>breverse fault. The mean return period for the normal earthquake was longer than that of the strike-slip earthquakes, while the reverse earthquakes had the shortest period. The obtained results report the relationship between the magnitude and focal depth of the normal earthquakes. A negative significant correlation between the magnitude and dip class for the normal and reverse earthquakes is reported. Negative and positive correlation relations between the focal depth and dip class were recorded for normal and reverse earthquakes, respectively. The suggested classification of earthquakes provides significant information to understand seismicity, seismtectonics, and seismic hazard analysis.
تاريخ النشر
30/01/2020
الناشر
College of Science-University of Baghdad
رقم المجلد
61
رقم العدد
1
ISSN/ISBN
0067-2904
رابط DOI
10.24996/ijs.2020.61.1.11
الصفحات
103-111
رابط الملف
تحميل (118 مرات التحميل)
الكلمات المفتاحية
faulting; earthquake; magnitude; b-constant; earthquakes classification
رجوع