II Felt by a few people, especially on upper floors. III Noticeable indoors, especially on upper floors, but may not be recognized as an earthquake. IV Felt by many indoors, few outdoors. May feel ...

Another scale is based on the physical size of the earthquake fault and the amount of slip that occurred. Then there are also measures of earthquake shaking intensity. The intensity from one ...

The JMA has so far been issuing earthquake early warnings--in the event of a seismic event expected to measure a maximum of “lower 5” or more on the Japanese seismic intensity scale of 7--to ...