زلزال بقوة 7.9 يضرب جنوب المحيط الهادي

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هلا اخوي شكرا لمرورك ولاضافتك للموضوع..لكن انا موضوعي غير
زلزال بقوة 7.9 يضرب جزيرة تونغا بلا خسائر

صورة تظهر مكان هزة بقوة ثماني درجات ضربت عرض سواحل تونغا في 2006 (الفرنسية-أرشيف)
ضرب مساء أمس زلزال بقوة 7.9 درجات على سلم ريختر سواحل جزيرة تونغا في جنوب المحيط الهادي لم يوقع ضحايا، لكن تبعه إنذار بتسونامي شمل الجزيرة والجزر المجاورة تم إلغاؤه.

وكان مركز الزلزال على بعد نحو مائتي كيلومتر من نوكو ألوفا عاصمة جزيرة تونغا، وكان على عمق عشرة كيلومترات حسب مركز المسح الزلزالي الأميركي.

وأصدر مركز الإنذار بموجات المد البحري للمحيط الهادي في هاواي تحذيرا بإمكان حدوث تسونامي يشمل جزرا مجاورة لتونغا مثل ساموا وفيجي، لكن ألغي فيما بعد.

وقال المركز في نشرته “عندما لا تسجل موجات كبيرة لساعتين بعد وقت الوصول التقريبي أو لا تحدث موجات مدمرة لمدة ساعتين على الأقل، تستطيع السلطات المحلية افتراض أن الخطر قد انتهى”.

ط§ظ„ط£ط®ط¨ط§ط±*-*ط¯ظˆظ„ظٹ*-*ط²ظ„ط²ط§ظ„ ط¨ظ‚ظˆط© 7.9 ظٹط¶ط±ط¨ ط¬ط²ظٹط±ط© طھظˆظ†ط؛ط§ ط¨ظ„ط§ ط®ط³ط§ط¦ط±

أختي آآنة ..

هذا مب زلزال .. هذا كان انفجار بركاني تحت مستوى سطح البحر

و هذا المصدر من الدايلي ميل The Daily Mail

Pictured: The spectacular eruption of an underwater volcano in the South Pacific | Mail Online

Pictured: The spectacular eruption of an underwater volcano in the South Pacific

By Daily Mail Reporter
Last updated at 8:13 PM on 19th March 2009

Spewing clouds of smoke, ash and steam thousands of feet into the sky, these dramatic images and video (below) show the raw power of an undersea volcano erupting.

The spectacular columns blasted out of the South Pacific yesterday six miles off the coast of Tonga’s main island Tongatapu. The eruption can be seen clearly from the capital, Nuku’alofa, although residents only reported seeing smoke rising from the sea on Wednesday, two days after it is believed to have begun

‘It’s a very significant eruption, on quite a large scale,’ said Keleti Mafi, head of the country’s geological service.

There she blows: The undersea volcano erupts off the coast of Tonga sending plumes of smoke and steam into the sky

Towering above: The sheer power of the volcanic eruption could be seen for many miles as smoke rose into the air

But authorities said today that the eruption does not pose any danger to islanders at this stage, and there have been no reports of fish or other animals being affected.

No warnings have been issued to the coastal villages close to the volcano, which is one of 36 undersea volcanoes clustered in that area. The situation is being helped by trade winds which continue to blow gas and steam away from the island.

Choppy waters: The rolling seas beneath the full fury of the undersea volcano which is part of a cluster of 36 in the area

Rare sight: Spectators edge closer to the drama being played out in front of them just six miles off Tonga’s main island of Tongatapu

Visible from space: The puff of white is the eruption in Tonga captured by a satellite orbiting Earth

Those living nearby said the columns of steam and ash first appeared on Monday morning, after a series of sharp earthquakes were felt in the capital, Nuku’alofa.

‘This is not unusual for this area and we expect this to happen here at any time,’ Mr Mafi said, adding that a similar eruption took place there in 2002.

Scientists believe the underwater eruption was taking place to the west of the low-lying twin volcanic islands of Hunga Tonga and Hunga Ha’apai, within sight of Nuku’alofa.

Large amounts of pumice thrown up by the erupting volcano would be likely to clog beaches on the southern coast of nearby Fiji islands within a short time, he said.

Tonga, a 170-island archipelago about halfway between Australia and Tahiti, is part of the Pacific ‘ring of fire’ – an arc of earthquake and volcanic zones stretching from Chile in South America through Alaska and down through Vanuatu to Tonga.

Awe-inspiring: The debris from the offshore eruption is expected to drift over to the southern coast of Fiji and clog its beaches

The column of steam and ash first appeared on Monday, after a series of sharp earthquakes were felt in Tonga’s capital, Nuku’alofa

No danger: The smoke can be seen six miles off the main Tongan island of Tongatapu but it is not a threat to the health of residents of the island

The U.S. Geological Survey says that a 7.9 earthquake has struck near Tonga, prompting a tsunami warning for adjacent islands in the South Pacific. The USGS says that the quake struck about 130 miles (200 kilometers) south-southeast of the Tongan capital of Nuku’Alofa at a depth of 6.2 miles (10 kilometers). It struck Friday morning local time. There were no immediate reports of injuries or damage. The Pacific Tsunami Warning Center has issued a tsunami warning for neighboring islands, but it was not immediately known if a tsunami had been generated. It also advises that some coastal areas of Hawaii could see a rise in sea level and strong currents lasting up to several hours.

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