Research on tectonomagnetism and its application to earthquake prediction

The tectonomagnetism investigations in the earthquake region show that obvious anomalous changes in the magnetic field exist pre and co earthquakes. The seismomagnetic precursors basically are near field effects; the epicentral distances are several to tens km; the change amplitudes are several nT; the time precursors last is several days to more than one year. New progresses of the research on volcano tectonomagnetism further show that the volcano magnetic effects are closely related to the volcano activity states, such as volcano earthquake, deformation, fracture and eruption; it provides important basis and method for monitoring and predicting volcano eruption hazards. According to the physical basis of tectonomagnetism, earthquake prediction is actively carried out, showing a perspective earthquake prediction research by means of tectonomagnetism. However, it is still situated at the period of data accumulation and the trial stage, and further observation and research should be made in the future.