earthquakes

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Author:
s11.lbeam
ID:
3152
Filename:
earthquakes
Updated:
2009-12-15 11:26:05
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earthquake
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earthquakes
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  1. Armenia (Spitak)
    • -Dec. 7 1988
    • -Ms 6.9
    • -Deaths 25,000 estm.
    • epicenter- under Spitak
    • hypocenter- 6 miles
    • aftershock-M5.9, 4 mins later, 14 mis later M4.5
    • rupture 5 miles long
    • fault?
    • offset 6 ft
    • shaking lasted 30 sec
    • amplified shaking liquefaction- Yes alluvium
    • biulding stds- poor stone and concrete
    • education none
    • emer. support none
    • time of day high rise
  2. Loma Prieta ("world series")
    • Oct. 17 1989
    • Ms7.1 Mw 6.9
    • 63 died
    • epicenter 50 miles from S.F. 13 miles santa cruz
    • hypocenter 3-11 miles
    • aftershock 2-M less than 5
    • rupture- no
    • fault San Andreas
    • offset 3 1/2ft horz. and 5 ft. vert
    • lasted 10-16 secs
    • amplified shaking lique. yes (bay mud, landfill)
    • building stds. good
    • educ. good emrg. support good
    • time of day- few on roads (world series)
  3. Northridge (Los Angeles)
    • Jan. 17 1994
    • Mw 6.7
    • 57 died
    • epicenter- San fernando 15 miles north of LA
    • hypocenter- 11mil
    • aftershock- M 5.9-6
    • rupture- no
    • fault-unknown
    • offset- blind thrust
    • lasted 15-20 secs.
    • shaking yes (alluvium)
    • building- good
    • educ. good
    • support good
    • time of day few on roads (holiday, early)
  4. Nisqually (Seattle)
    • Feb. 28 2001
    • Mw 6.8
    • 1 died
    • epic. 10 mi Tacoma 35 mi from Seattle
    • hypo 33 mi
    • aftershock-M 3.4, 2.7
    • rupt. no
    • fault unknown
    • offset normal
    • lasted 10-20 secs
    • shaking yes (landfill)
    • building- fair
    • educ. pretty good
    • support good
    • time of day (high rises)
  5. Kobe Japan
    • Jan. 17 1995
    • Mw 6.9 Ms 7.2
    • hypo 9-12 miles
    • rupture 18-30 mi
    • lasted 15-20 secs
    • 5000 died
    • shaking yes (landfill)
    • buildings- poor tile roofs

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