It is proportional to the total amount of anomalous data results, and is inversely proportional to the distance to the epicenter.
Around the center of several observation points that had data anomalies.
2 or 3 days after electromagnetic signals settled (disappeared).
There is a possibility of an earthquake.
There is a high possibility of an earthquake.
There is a possibility of an earthquake occurring within days.
There is a possibility of an earthquake within 2 weeks.
There is a possibility of a large earthquake far away.
There is a possibility of a large earthquake nearby.
Normal distribution bell-shaped
Bar-shaped
Wide bar-shaped data, dangerous situation
A massive amount of electromagnetic noise is produced for a long period of time before a large earthquake occurs.
It was thought before that “electromagnetic signals could not come up to the earth’s surface from deep underground without going through bedrock and the earth’s crust.”