地球内部过程 Earthquake Fault scarp Fault Faut□ ante Figure 4.4 Simplified diagram of a fault. showing the f or hypocenter (point of' first break along the fault), and the picenter(point on surface directlv above the focus), Seismic waves dissipate the energy released by the earthquake as they travel away from the fault zone. Fault sarp is clill formed along the fault plane at ground surface: fault trace is the line along Figure 4.1 (A) Damage from the 198) loma Prieta hich the fault plane intersects the ground surlace California (/) Overturned section of Hanshin E xpress National Highway 3. eastern Kobe. This expressway was built freeways are.o then-existing seismie design standards. Elevates 环境迪顶学 minoucntalocelogu ,率
地球内部过程 Earthquake
地球内部过程 Earthquake Epicenter震中 and focus震源: When an earthquake occurs, seismic waves travel in all directions from the focus, the region where the earthquake's energy originates. The foci焦距、震源 of most earthquakes are concentrated in the earth's crust which is about 50 km thick under continents. Earthquakes are classified according to focal depths a)0-60 km are shallow, b)60-300 km are intermediate and c)deep earthquakes may reach depths of 700 km. The epicenter of an earthquake is the point on the earth's surface directly above the focus 环境迪顶学 minoucntalocelogu ,率
地球内部过程 Earthquake Epicenter震中 and Focus震源: When an earthquake occurs, seismic waves travel in all directions from the focus, the region where the earthquake's energy originates. The foci焦距、震源 of most earthquakes are concentrated in the earth's crust, which is about 50 km thick under continents. Earthquakes are classified according to focal depths a) 0-60 km are shallow, b) 60-300 km are intermediate, and c) deep earthquakes may reach depths of 700 km. The epicenter of an earthquake is the point on the earth's surface directly above the focus.