Two subduction zone interplate earthquakes have been recorded along the Sagami Trough,the first in AD 1703(Genroku Earthquake)and the second in AD 1923(Taisho Earthquake).While the source areas of these two events ove...Two subduction zone interplate earthquakes have been recorded along the Sagami Trough,the first in AD 1703(Genroku Earthquake)and the second in AD 1923(Taisho Earthquake).While the source areas of these two events overlapped within and around the Sagami Bay,the 1703 Genroku Earthquake had a larger rupture area,which propagated to off the Boso Peninsula.Currently,our understanding of prehistorical earthquakes has been facilitated by Holocene marine terraces and tsunami deposits,through which we have come to the understanding that past Kanto earthquakes can be divided into two types–the Taisho-type and the Genrokutype.Taisho-type earthquakes are thought to be more common,occurring approximately every 400 years on average.展开更多
文摘Two subduction zone interplate earthquakes have been recorded along the Sagami Trough,the first in AD 1703(Genroku Earthquake)and the second in AD 1923(Taisho Earthquake).While the source areas of these two events overlapped within and around the Sagami Bay,the 1703 Genroku Earthquake had a larger rupture area,which propagated to off the Boso Peninsula.Currently,our understanding of prehistorical earthquakes has been facilitated by Holocene marine terraces and tsunami deposits,through which we have come to the understanding that past Kanto earthquakes can be divided into two types–the Taisho-type and the Genrokutype.Taisho-type earthquakes are thought to be more common,occurring approximately every 400 years on average.
