Seismic activity remains high off the eastern coast of Aomori Prefecture following a magnitude-7.5 earthquake on Monday. Japan's Meteorological Agency is urging people along the northern Pacific coast and elsewhere to stay vigilant against a possible mega quake.

Japan’s weather agency has warned that another large-scale earthquake could follow the 7.5-magnitude tremor which hit the country on Monday.The earthquake has left at least 33 people injured and led to tsunami warnings,

TOKYO >> Japanese authorities lifted tsunami warnings on Tuesday hours after a powerful 7.5-magnitude earthquake shook northeastern regions, injuring at least 30 people and forcing about 90,000 residents to evacuate their homes.

After a 7.5-magnitude earthquake on Monday, Japanese officials issued a rare warning for a potentially even larger follow-up.

Japan is warning about a potential megaquake after a massive earthquake struck parts of the country. CBS News' Errol Barnett reports.

The 417-day-long experiment, known as LUX-ZEPLIN (LZ), looked at the light signatures released as particles collide with xenon atoms in a giant vat, which is placed deep underground so that most particles from space cannot muddy the results.