Induced earthquakes currently pose a significant hazard in the central United States, but there is considerable uncertainty about the severity of their ground motions. We measure stress drops of 39 moderate-magnitude induced and tectonic earthquakes in the central United States and eastern North America. Induced earthquakes, more than half of which are shallower than 5 km, show a comparable med...

In recent years, debris flow disasters have occurred frequently along the highway, causing river blockages and road interruptions, which seriously threaten safety of people's lives property. Highway G318 is an important throat project linking Sichuan Tibet; at same time, it channel for economic development Tibet transportation national defense materials. Taking Linzhi–Lhasa Section as example, ...

The demand for Natural resources is increasing day by day due to increasing population , rapid urbanization, industrial growth and agricultural utilization. The levels of Groundwater is decreasing over years due to all the above activities and decreasing of annual rainfall year by year due to climatic changes and increasing runoff due to urbanization and deforestation. Hence, it is necessary to...

Abstract Submarine geomorphology underwent significant development in the second half of twentieth century, largely thanks to advances technology by military, navigation and hydrocarbon industry, which were later transferred academic commercial sectors. In this chapter we summarize key methods used submarine between 1950 2000, include sidescan sonar, multibeam echo sounder, reflection seismolog...

[1] A simple dynamic model based on boundary layer theory shows that dynamic topography is unlikely to vary significantly in response to short term ( 20 Myr) variations in the mean tectonic velocity. Tectonic velocities essentially mirror variations in mantle viscosity, but are not indicative of substantial modification of dynamic topography, which primarily reflects mass anomalies in the mantl...

extended abstract 1. introduction neo-tectonics is the study of horizontal and vertical motions of earth’s crust originating from the late periods of neogen and quaternary. many researchers have defined tectotecnic as “the beginning of earth’s crust motions after the earliest orogenic phase” (stipancikova et al., 2008, p. 68). since there is no possibility of having access to the old seismic re...

Is erosion important to the structural and petrological evolution of mountain belts? The nature of active metamorphic massifs colocated with deep gorges in the syntaxes at each end of the Himalayan range, together with the magnitude of erosional fluxes that occur in these regions, leads us to concur with suggestions that erosion plays an integral role in collisional dynamics. At multiple scales...