Awaiting details - Intensity of 3 on the 7 point scale used in Japan

  • No tsunami warning issued
  • Magnitude 4.9

Japanese broadcaster NHK with the initial reports, the quake near Tokyo:

  • Centred in the north west of Chiba prefecture (just east of Tokyo)

More now (USGS)

  • M5.0
  • 59.6km depth
  • 7km SE of Shiroi, Japan

More: