60 likes | 308 Views
Earth Quake in Portland. By Michael Zara. January 15 2003. Two earthquakes with magnitudes of 5.3 & 5.5 struck the Portland area. The epicenters were located on the sea floor The quake did not cause a tsunami or tidal wave.
E N D
Earth Quake in Portland By Michael Zara
January 15 2003 • Two earthquakes with magnitudes of 5.3 & 5.5 struck the Portland area. • The epicenters were located on the sea floor • The quake did not cause a tsunami or tidal wave. • If these earthquakes had of occurred o land, they would have done considerable damage.
Epicenters for Quake • Along Blanco fracture zone (FZ) • Blanco FZ is located next to the Cascadia subduction system. • Past quakes on this zone have exceeded 9.0 on the Richter Magnitude (RM) scale • Quakes this big (>RM9.0) happen every 300 yrs, the last one being in the 1700’s.
Oregon State Department of Geology suggestions for dealing with earthquakes • Know how to protect your self by ducking under furniture or finding a safe area. • Prepare a 72 hr emergency kit. • Have a plan for communication with other family members if separated. • Know how to evacuate from coastal areas
Fig.4.03 W. W. Norton
Fig. 09.18a W. W. Norton