EARTH 20 Lecture 9: EARTH20 L9 (2.21.18)
Document Summary
Tourist town of banos at base of volcano. Eruption would cause melting and ash would combine with water to make lahar (destructive mudflow on slopes of volcano) And nearby canyon would funnel lahar into town. General gonzalo arevalo director of civil defense of ecuador. Usgs isn"t always wanted/supported to determine best plan of action because volcanoes aren"t super predictable so people get angry if they predict wrong. Effects of tsunamis and hazards they pose on coastal regions. What nations, communities and individuals can do to minimize the hazard of tsunamis. Tsunamis are generated by any disturbance that displaces a large water mass from its equilibrium position. 1883 krakatoa (volcanic collapse) (some of highest waves: 116 ft) 2004 sumatra (m9. 1) (one of highest death tolls: killed >230k people) Amplitude: height of crest/trough (bottom) (wave height divided by 2?) Period: time period between successive crests or troughs. Need >m7. 5 eq to create enough displacement.
