Seismic activity is one of the prime early warning signals of volcanichazard.
地震活动是火山喷发的主要前兆之一。
2
Risk assessment of volcanichazard is one of important contents in research of volcanichazard reduction.
火山灾害风险评估是火山减灾的重要研究内容之一。
3
The confirmation of two-stage eruptions is helpful to learn the history and process of Laoheishan Volcano eruption and the assessment and mitigation of volcanichazard in the future.