WELLINGTON, New Zealand (AP) - A strong earthquake with a magnitude of 6.3 shook many parts of New Zealand early Tuesday, but emergency services reported no serious damage because the temblor struck deep underground. The quake was centered near Taupo, 235 miles north of the capital, Wellington, according to the Institute of Geological and Nuclear Sciences. The tremor, striking 100 miles underground, was felt throughout New Zealand's North Island and as far south as Christchurch, 210 miles south of Wellington, on the South Island. Earthquakes of magnitude 6 can cause severe damage, but the strength of the quake was dissipated because it occurred so far below ground.