Study on observation difficulties and countermeasures of meta-instability stage

Some progress have been made in the study of meta-instability. It is considered that accelerated synergy is a sign that the region as a whole enters the quasi-dynamic meta-instability stage, and is also a sign of inevitable earthquakes. Therefore, the effective observation and identification of seismogenic meta-instability has become a key issue. We can get the information of the seismogenic body through the " homologous precursor wave” to identify whether it is entering the meta-instability state. Short-term and impending earthquake prediction is undoubtedly based on the theory of earthquake prediction, the arrangement of seismic observation network and observation instruments. The difficulties of observation can be roughly summed up as follows: aseismic sliding is a major difficulty in earthquake prediction, the theoretical model, experimental results and observation results are difficult to match, there are regional differences in the whole process of rock creep rupture, deep decoupling constraints and the limitations of the current observation system exist. We have explored some countermeasures to overcome difficulties by using " homologous precursor wave” as a carrier. The improvement measures are put forward for the current observation network deployment strategy and observation instrument development.