Map locating the epicenter of a 6.6-magnitude quake that hit the
southwest edge of Japan's Okinawa province, near the coast of Taiwan on
April 20, 2015
A warning
for a tsunami as big as one metre (three feet) forecast to hit islands
in Japan's far south after a 6.6 magnitude earthquake struck off eastern
Taiwan was cancelled on Monday.
National
broadcaster NHK said waves were possible on several islands in the
southern Okinawa chain after a very shallow quake centred on Yonaguni in
the southwest, near Taiwan.
Witnesses said buildings swayed in Taipei but there was no visible damage in the Taiwan capital.
The US
Geological Survey said the 6.6 magnitude quake, which Japanese
authorities had originally put at 6.8, struck 71 kilometres (44 miles)
east of Hualian, Taiwan at 0143 GMT.
Japan
sits at the confluence of four of the earth's tectonic plates and
registers more than 20 percent of the planet's most powerful earthquakes
every year
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