{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Outline Prelim 1

# Outline Prelim 1 - 12:30:00 In Class Review Chapters...

This preview shows pages 1–4. Sign up to view the full content.

06/03/2008 12:30:00 In Class Review Chapters: 1,2,3,4,11,12,13 Mostly lecture 75% of questions from quizzes Mostly material since first quiz, but know basics of weather Only know earthquakes we’ve gone over in class… San Fransisco 1906 o Earthquake as indirect cause of fire o Earthquake prevented fire extinguishing o Elastic rebound theory : Reid tried to link fault movement to motion o Major earthquake, not a great earthquake : above an 8, S.F. was slightly under 8—7.7 (logarithmic scale, difference between 7.7 and 8 is large) o Right lateral movement, dextral Mexico City 1985 o Site response, occurred just outside Mexico City o Occurred on site of old lake in bowl shaped valley, geometric bullseye o “Poster child” for where not to put a city, has largest population in the world o Intensity : measurement of interest in this case, measures shaking on Mercali Scale o Soft ground—liquefaction o Warning system now gives a few minutes warning, allows people to turn off gas, water, transportation systems, get out of buildings o Subduction zone therefore likely a reverse/thrust fault Chile 1960

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
o Biggest earthquake measured by modern instrumentation o M w =9.6 o Convergent boundary, subduction zone caused destructive tsunami (common for this kind of boundary) o Reverse fault o Pacific Plate subducting under S.A. plate o Width of fault determines size of earthquake o Temperature determines depth of earthquake o Vertical fault vs. dipping fault, dipping faults are bigger because they represent a larger break ( | vs \ ) Northridge, CA 1994 o Not a great earthquake: 6.7 o Underground reverse fault launched upward motion great amount of damage, tossed buildings up into bthe air o Raised awareness about hidden faults o Reverse movement (mostly up and down as opposed to lateral) New Madrid, MO 1811-1812 o Played a role of the Native American confederation o Changed course of Mississippi River o Did not occur on a plate boundary, intra-plate earthquake Biggest one in the US Problematic: impossible to predict o May be associate with an old plate boundary rift, when Lurasia broke up to form modern Americas, failed attempt to split North America o Intensity as compared to San Fransisco
Same intensity

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 8

Outline Prelim 1 - 12:30:00 In Class Review Chapters...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online