Even Unzen volcano has been declared to be in a state of relative dormancy,the latest formed lava lobe No.11 now represents a potential slope failure mass based on the latest research.This paper concentrates on the st...Even Unzen volcano has been declared to be in a state of relative dormancy,the latest formed lava lobe No.11 now represents a potential slope failure mass based on the latest research.This paper concentrates on the stability of the lava lobe No.11 and its possible critical sliding mass.It proposes geographic information systems (GIS) based three-dimensional (3D) slope stability analysis models.It uses a 3D locating approach to identify the 3D critical slip surface and to analyze the 3D stability of the lava lobe No.11.At the same time,the new 3D approach shows the effectiveness in selecting the range of the Monte Carlo random variables and locating the critical slip surface in different parts of the lava lobe No.11.The results are very valuable for judging the stability of the lava lobe and assigning the monitoring equipments.展开更多
Recent eruption in 1991-1995 years of Unzen Volcano(Kyushu Island,Japan)has caught attention of many volcanologists because of dramatical consequences of the previos eruption in 1792,when more than 15000 people were p...Recent eruption in 1991-1995 years of Unzen Volcano(Kyushu Island,Japan)has caught attention of many volcanologists because of dramatical consequences of the previos eruption in 1792,when more than 15000 people were perished.So it is important to study this volcano and try to predict future eruptions and their possible damage.It is proved now,that magma hybridization processes展开更多
Recent eruption of Unzen Volcano in 1991-1995 caught attention of scientists all over the world because of disastrous character of previous one in 1792. Intrusion of andesitic magma to the chamber with rhyolitic magma...Recent eruption of Unzen Volcano in 1991-1995 caught attention of scientists all over the world because of disastrous character of previous one in 1792. Intrusion of andesitic magma to the chamber with rhyolitic magma is proposed to be a trigger for these eruptions. T-P-X parameters of two end-member magmas have been estimated several times, but usually estimations are based on phenocrysts assemblages. New results of this research are based on mafic enclaves and groundmass. These results are significant for magma mixing and mingling theory.展开更多
The territory of the Shimabara Peninsula could recover steadily from volcanic disasters associated with the eruption at Unzen during 1991-1995. The disasters and the recovery brought various lessons, related to respon...The territory of the Shimabara Peninsula could recover steadily from volcanic disasters associated with the eruption at Unzen during 1991-1995. The disasters and the recovery brought various lessons, related to responses to volcanic eruptions and hazards, support system for people impacted by the disasters and the method for socioeconomic recovery. After the eruption, education facilities to learn volcanic eruptions and disasters, such as the Mount Unzen Disaster Memorial Hall, were prepared, as well as scientific projects to clarify eruption mechanisms were carried out. Under these circumstances, holding two international conferences were invited. The 5th Cities on Volcanoes Conference and the 5th International UNESCO Conference on Geoparks were held in Shimabara in 2007 and 2012, respectively. Under these circumstances, holding two international conferences were invited. On the process that local people recovered from the disasters, the communities carried out disaster-prevention education and volcano tourism, utilizing the Mount Unzen Disaster Memorial Hall and the park of houses buried by mudflow deposits. The memorial hall archives valuable materials of the disasters and provides simulations of volcanic eruptions with the newest technology, by which visitors can learn about volcanic eruptions. Disaster remains, such as the memorial hall and park, are effective for visitors who did not experience volcanic disasters and are difficult to imagine the real volcanic hazard.展开更多
基金Supported by the National Natural Science Foundation of China (40972229)provided by JSPS and Sabo Technical Center,Japan
文摘Even Unzen volcano has been declared to be in a state of relative dormancy,the latest formed lava lobe No.11 now represents a potential slope failure mass based on the latest research.This paper concentrates on the stability of the lava lobe No.11 and its possible critical sliding mass.It proposes geographic information systems (GIS) based three-dimensional (3D) slope stability analysis models.It uses a 3D locating approach to identify the 3D critical slip surface and to analyze the 3D stability of the lava lobe No.11.At the same time,the new 3D approach shows the effectiveness in selecting the range of the Monte Carlo random variables and locating the critical slip surface in different parts of the lava lobe No.11.The results are very valuable for judging the stability of the lava lobe and assigning the monitoring equipments.
文摘Recent eruption in 1991-1995 years of Unzen Volcano(Kyushu Island,Japan)has caught attention of many volcanologists because of dramatical consequences of the previos eruption in 1792,when more than 15000 people were perished.So it is important to study this volcano and try to predict future eruptions and their possible damage.It is proved now,that magma hybridization processes
文摘Recent eruption of Unzen Volcano in 1991-1995 caught attention of scientists all over the world because of disastrous character of previous one in 1792. Intrusion of andesitic magma to the chamber with rhyolitic magma is proposed to be a trigger for these eruptions. T-P-X parameters of two end-member magmas have been estimated several times, but usually estimations are based on phenocrysts assemblages. New results of this research are based on mafic enclaves and groundmass. These results are significant for magma mixing and mingling theory.
文摘The territory of the Shimabara Peninsula could recover steadily from volcanic disasters associated with the eruption at Unzen during 1991-1995. The disasters and the recovery brought various lessons, related to responses to volcanic eruptions and hazards, support system for people impacted by the disasters and the method for socioeconomic recovery. After the eruption, education facilities to learn volcanic eruptions and disasters, such as the Mount Unzen Disaster Memorial Hall, were prepared, as well as scientific projects to clarify eruption mechanisms were carried out. Under these circumstances, holding two international conferences were invited. The 5th Cities on Volcanoes Conference and the 5th International UNESCO Conference on Geoparks were held in Shimabara in 2007 and 2012, respectively. Under these circumstances, holding two international conferences were invited. On the process that local people recovered from the disasters, the communities carried out disaster-prevention education and volcano tourism, utilizing the Mount Unzen Disaster Memorial Hall and the park of houses buried by mudflow deposits. The memorial hall archives valuable materials of the disasters and provides simulations of volcanic eruptions with the newest technology, by which visitors can learn about volcanic eruptions. Disaster remains, such as the memorial hall and park, are effective for visitors who did not experience volcanic disasters and are difficult to imagine the real volcanic hazard.
