ANNOUNCEMENTS

1
ANNOUNCEMENTS

• First hour exam Wednesday 2/7 review session
  Monday 2/5 5.00 - 6.00, here
• Happy Groundhogs Day, also Candlemas, and
  various other names.

2
ANNOUNCEMENTS

• I STILL need PINs from Boykin, Buchanan,
  Civetta, Clausen, Dickason, Duvick, Escalante,
  Fix, Gonzalez, Hunt, Hurst, Jimerfield, Jones,
  Krupoff, Magaldi, Mayon, Meehan, Moehr, Nelson,
  Rawls, Sillin, Slade, Watson
• Email me your PIN please (painless, and lets you
  take the exam, and so pass the class)

3
TODAY

• Terminology of earthquakes
• focus
• epicenter
• fault trace ( strike line)
• fault plane (has a strike and a dip)
• magnitude
• intensity
• The video

you know these
4
Since I know everyone totally gets it now

• Clickers please

5

• What kind of fault movement warped this row of
  young corn?
• left-lateral strike-slip movement
• right-lateral strike-slip movement
• normal dip-slip movement
• reverse dip-slip movement

Guatemala, 1976
6
The other two terms

• Magnitude how big
• Intensity how damaging

7
From, Science Made Stupid
8
The video

• is a bit sappy, but has great information, so pay
  attention to
• the different hazards discussed
• the concept of seismic gap, and
• earthquake prediction
• complete the worksheet
• EVERYTHING in class (including a video, hint,
  hint) is fair game for the exam

9
Clickers please(wake up)
10
A seismic gap that exists near San Francisco
suggests that

• an earthquake is likely to occur there in the
  near/intermediate future
• the stress in the Earths crust has been relieved
  by large and small earthquakes, leaving a gap in
  the zone of most danger.
• scientists are able to image where the tectonic
  plates are in contact, and there is a gap between
  them
• after a certain amount of time, movement on the
  San Andreas Fault may become left lateral

11
A seismic gap that exists near San Francisco
suggests that
If you had a second-most likely choice, please
vote again

• An earthquake is likely to occur there in the
  near/intermediate future
• The stress in the Earths crust has been relieved
  by large and small earthquakes, leaving a gap in
  the zone of most danger.
• Scientists are able to image where the tectonic
  plates are in contact, and there is a gap between
  them
• After a certain amount of time, movement on the
  San Andreas Fault may become left lateral

12
An earthquake with M6.2 occurred about 50 km from
this area. If there were building all along this
profile, where did the most damage probably occur?
A
B
C
D
Need a hammer to break either of these
Pieces of other rocks, somewhat consolidated