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TOKYO (BNO NEWS) -- A strong earthquake struck off eastern Japan on late Tuesday afternoon, seismologists said, but no tsunami warnings were issued. The 6.3-magnitude earthquake at 5.18 p.m. local time (0718 GMT) was centered about 272 kilometers (169 miles) east of Iwaki on Honshu, the country's main island. It struck about 10 kilometers (6.2 miles) deep, making it a shallow earthquake, according to the Japan Meteological Agency (JMA). JMA initially measured the strength of the earthquake at 6.8, but later downgraded the magnitude to 6.3. The United States Geological Survey (USGS) measured the strength of the quake at 6.6 on the Richter scale. The Pacific Tsunami Warning Center said there was no tsunami threat.
MAG UTC DATE-TIME LAT LON DEPTH Region
y/m/d h:m:s deg deg km
MAP 6.6 2011/03/22 09:44:29 39.863 143.436 15.5 OFF THE EAST COAST OF HONSHU, JAPAN
MAP 6.4 2011/03/22 09:19:05 37.334 141.861 27.0 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 4.7 2011/03/22 08:33:10 36.913 140.997 53.7 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 4.7 2011/03/22 07:41:28 36.014 141.415 41.1 NEAR THE EAST COAST OF HONSHU, JAPAN
MAP 6.6 2011/03/22 07:18:47 37.249 143.956 26.5 OFF THE EAST COAST OF HONSHU, JAPAN