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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
-
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)
-
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)
-
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)
-
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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