India, Aug. 23 -- A second earthquake of magnitude 6.0 struck parts of Japan's Hokkaido prefecture on Sunday evening, just hours after tremors of magnitude 5.9 rattled the country's eastern part, leaving over 30 people injured in Tokyo.

According to the Japan Meteorological Agency (JMA), the second earthquake had a depth of 40 kilometres, with its epicentre off the coast of Urakawa in Hokkaido. The quake hit at 10:45pm (local time).

However, no tsunami warning was issued because the tremors' seismic intensity was 4 on a scale of 7, JMA said.

In the first earthquake, that rattled Tokyo, most of the injured were hurt when they fell down or hit themselves against furniture or doors as they were caught off guard by the quake while sleeping...