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Earth Quake in Portland

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.

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Earth Quake in Portland

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  1. Earth Quake in Portland By Michael Zara

  2. 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.

  3. 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.

  4. 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

  5. Fig.4.03 W. W. Norton

  6. Fig. 09.18a W. W. Norton

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