A review on non-valcano tremor

Non-volcano tremor represents seismic signal observed away from volcanic regions with long durations, unclear body wave arrivals, and spectra depleted in high-frequency energy compared with regular earthquakes of similar amplitude. Non-volcano tremor is usually detected in circum-Pacific subduction zone and near transform faults. Meanwhile, non-volcano tremor is often associated with slow-slip events, and can be triggered by surface waves of teleseismic events. The necessary environment of tremor generation is not clear yet. China is a country with frequent earthquakes due to the south-east coast subduction zone and many large faults. Those factors provide sufficient environment for non-volcano tremor research. Therefore, this paper summarizes the identification, location, generation, and current situation of non-volcano tremor.