AbstractChina has numerous active volcanoes, and more than 10 erupted in the Quaternary. Although a modern eruption event has not occurred in China, the potential risk from volcanic hazards should be noted. With the development of geodetic technologies including Global Positioning System (GPS), levelling, and Interferometric Synthetic Aperture Radar (InSAR), volcanologists can now detect the present-day deformation state of China's active volcanoes. In this paper, we summarised the present-day deformation patterns, magma sources, and magma plumbing systems of China's active volcanoes during 1970-2013. The results showed that the most active volcano in China is the Changbaishan volcano, it showed significant inflation during 2002-2003, with the deformation becoming gradually weaker after 2003, indicating it had been experiencing a magma process during 2000-2010. A point source at a depth of approximately 10 km was responsible for the observed deformation. The Leiqiong volcanic field showed a trough pattern deformation during 2007-2010, which was interpreted as a dyke intrusion model. Fluctuant deformation patterns were shown in the Tengchong volcanic field. The Longgang volcanic field had experienced a volcano-wide uplift during the 1970s and 1990s. Deformation was observed in the Tatun volcanic field during 2006-2013, and two shallow sources account for the observed deformation. These volcanoes merit further monitoring given possible evidence of deformation. No obvious deformation related to volcanic activity was observed at the Ashikule volcanic field during 2003-2011. The results provide a basic introduction of the deformation state of China's active volcanoes, and may be helpful for evaluating the activity levels of China's volcanoes and mitigating the risks of future volcanic hazards.
Jets of Fragments from Catastrophic Break-up and their Astrophysical Implications