1. Warm-Up Tuesday, February 11
Write What You Know!
Write everything you know about the prompt below for five minutes, try for at least 3-4 complete sentences.
What is the connection between earthquake epicenters and seafloor landforms such as mid-ocean ridges and deep-ocean trenches?

2. definition in own words facts pictures
Monitoring & Safety Notes
(Chapter 2.3 Monitoring Earthquakes)
(Chapter 2.4 Earthquake Safety)
2/11/2014
Major Key Term
definition in own words
Key Term
definition in own words
facts
pictures
Key Term

4. Earthquake Monitoring Instruments
Tiltmeter: measures tilting or raising of ground
consists of two liquid-filled bulbs connected by a stem
Creep Meter: measures horizontal movement of ground (“creep”)
uses a wire stretched across a fault
Laser-Ranging Device: also measures creep
but with lasers!
GPS Satellites: can detect changes in elevation and horizontal movement

5. Mapping Faults
Geologists use seismographs, tiltmeters, creep meters, satellites and other devices to map faults
to predict specific earthquake risk
to better understand faults, and improve predictions
Friction: force that opposes motion of one surface against another
Low friction, low risk, small earthquakes
High friction, high risk, severe earthquakes

6. Earthquake Dangers
Shaking: can trigger landslides, avalanches, damage and destroy buildings
Liquefaction: when violent shaking turns loose soil or sand into mud, buildings can sink, cracks can open
Aftershocks: smaller earthquake that hits after the first earthquake, hours, days, months later!
Tsunamis: (tidal wave) water displaced by an earthquake forms a large wave, can wash away buildings, people along shore, cause flooding

7. Earthquake Safety Drop, cover, and hold on!
Indoors: try to get under a sturdy table or desk, or against an inner wall, avoid window, mirrors, loose objects
Outdoors: move to open area, sit down, avoid vehicles, powerlines, trees, buildings

8. Safer Buildings