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هل السعودية ودول الخليج معرضة لخطر الزلازل الكبرى ؟.. رئيس "الجيولوجيين السعوديين" يجيب

هل السعودية ودول الخليج معرضة لخطر الزلازل الكبرى ؟.. رئيس "الجيولوجيين السعوديين" يجيب
صحيفة المرصد : أوضح رئيس مجلس إدارة الجيولوجيين السعوديين، عبد العزيز بن لعبون أن منطقة الخليج آمنة إلى حد ما من المخاطر الكبرى للزلازل.

الصفيحة العربية

وقال: "دول السعودية واليمن وعمان والإمارات وقطر والبحرين والكويت والعراق وشرقي سوريا والأردن، تكوّن ما يُعرف جيولوجيًا بالبلاطة أو الصفيحة العربية، وهي كتلة من القشرة العربية انفصلت عن الصفيحة الأفريقية قبل نحو 30 مليون سنة، ومنذ ذلك الحين وهي تتحرك باتجاه الشمال الشرقي بمعدل 2 سم سنويًا". حسب "سكاي نيوز".

سلاسل جبال
وتابع: "نتيجة لتلك الحركة تكوّن واتسع البحر الأحمر وخليج عدن، واصطدمت الصفيحة العربية بالصفيحتين الإيرانية والتركية وتكونت سلاسل جبال عمان، وزاغروس في جنوب غربي إيران، وجبال طوروس في جنوب شرقي تركيا."
وأردف :" كما تكونت سلسلة من الصدوع التحولية على امتداد خليج العقبة-البحر الميت وشمالًا، وسلسلة صدوع خليج عدن-بحر العرب (خط أوين)". مشيرا إلى أن جميع المناطق المذكورة تشكل حزاما نشطا من الزلازل والتصدعات، وما زال هذا الحزام نشطًا يتزلزل ويتصدع منذ ملايين السنين.

منطقة آمنة
وأضاف : أنه برغم أن الزلازل قد تحدث في أي مكان، إلا أن منطقة الخليج عموما لا تواجه مخاطر كبرى مرصودة لهذه الأسباب: "معظم منطقة الخليج تبعد عن خطوط التماس مع مناطق الزلازل الخطرة. والسعودية فقط من بين دول الخليج هي التي بها مناطق محدودة على تماسّ مع المنطقة الزلزالية التي تمتد من خليج العقبة شمالاً إلى جنوب شرق تركيا. والهزات الأرضية المتوالية في منطقة الخليج قد لا يشعر بها الناس.
وتابع : على امتداد ساحل البحر الأحمر تحدث ألف هزة أرضية يوميا لا ينتج عنها أية مخاطر.
ويتركز النشاط الزلزالي عموما في هذه المناطق: شمال غربي السعودية والأردن وسوريا وجنوب شرقي تركيا - شمال العراق وجنوب غربي إيران وعمان - اليمن وجنوب غربي السعودية.
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