Wednesday, May 3, 2006 Posted: 1725 GMT (0125 HKT)
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(CNN) -- Tsunami warnings were issued for Fiji and New Zealand after a massive earthquake measuring about 7.8 in magnitude shook the southern Pacific Ocean.
The quake's epicenter was about 153 kilometers (95 miles) off the coast of Tonga, according to the U.S. Geological Survey.
It struck Thursday at 4:26 a.m in Tonga (Wednesday at 1526 GMT).
The geological center stressed that "it is not known that a tsunami was generated" by the quake.
"This warning is based only on the earthquake evaluation," it said.
On the island of Fiji, to the west of Tonga, several people contacted by CNN reported no damage. One local journalist said he felt a tremor, but said the local seismologists had recorded a much weaker quake.
David Applegate, senior science adviser for the USGS, told CNN the earthquake was likely to affect only "a relatively small population."
"So far, we've got five responses in four city areas on the islands of Tonga, with intensities ranging from fairly light shaking up to very strong shaking," Applegate said.
The Pacific Tsunami Warning Center issued alerts for the islands of Tonga, Niue, American Samoa, Samoa, Fiji, and Wallis-Futuna.
The center's most recent report said a tsunami could have begun to affect the islands as early as 1600 GMT (noon ET).
