Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
by Staff Writers
Sydney (AFP) May 23, 2013
A 7.4-magnitude earthquake struck 255 kilometres (158 miles) southwest of Tonga early Friday, according to the US Geological Survey.
The under-sea quake struck at 5:19 am (1719 GMT Thursday) and sparked a tsunami alert, although no damage was expected due to its depth of 171 kilometres, according to the Pacific Tsunami Warning Center.
The earthquake, centred 282 kilometres southwest of Tonga's capital Nuku'alofa, was followed four hours later by a second powerful 6.6 tremor 84 kilometres northwest of the town.
The second quake, at a depth of 103 kilometres, also generated a tsunami warning.
"A destructive tsunami was not generated based on earthquake and historical tsunami data," the centre said of each quake.
The two quakes come 12 days after a similar 6.5-magnitude earthquake struck the area, at a depth of 205 kilometres.
Tonga, almost 2,000 kilometres (1,240 miles) northeast of New Zealand, lies on the so-called Pacific "Ring of Fire", where continental plates collide causing frequent seismic activity.
Bringing Order To A World Of Disasters
When the Earth Quakes
A world of storm and tempest
|The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement|