Due to the amount of water displaced from this earthquake, a tsunami was iniWated. The figure below details the manner that the tsunami travelled across the Pacific Ocean Basin.

Description

On 3/11/2011 near HONSHU ISLAND, JAPAN (38.322°N, 142.369°E) at 5:46:23 (UTC), a magnitude 9.0
earthquake occurred. Due to the amount of water displaced from this earthquake, a tsunami was iniWated. The
figure below details the manner that the tsunami travelled across the Pacific Ocean Basin. Use the figure below
to answer the following quesWons. The colors and divisions on this map represent where the tsunami is located
aer one hour of Wme (lines labeled 5, 10, and 15 are 5, 10, and 15 hours post-earthquake). The star
represents the earthquake locaWon, and also Osaka, Japan)

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ΝΑ ΤΑ
Sted
COMMON
HERE:
WEAPON
STA
SEAL BEACH
Naples
LOS ANGELES
BORANGE
mito Boy
HIETISTA DE
AL REACH
SASMALLOLLER
Alamito
Boy
Landhi
ER
os
LONG BEACH
SAAL
SUS
SAL
tos na
WPORTION
SAN
PEDRO
SEAL BEACH
SU
US
WAS
AWAREN
BAY
San
B
LAHA
YORBA DNEA
SOUTH GATE
WHITTER
BINO
PRADO DAM
CORONA NORTH
RIVERSIDE WEST
Sunset Bea
ANAHEIM
ORANGE
LOS ATOS
CORONA SOUTH
LENG BEACH
CAKE MATHEWS
BUACK STAR CANYON
EL TORO
ALBERHILL
SEAL BEA
EWPORT BEACK
A TUSTIN
CAGUNG BEACH
STTON PEAK
SANTIA
TIAGO PEN
SAN JUAN CAPISTRANO
CANADA GOBERNADORA
DANA PORT
Sje
MARDARNA PEAK
10.The map above shows the tsunami inundation zone for Seal Beach (shaded in red). The square within the
map is the location of the Seal Beach City Hall – the center for emergency response operations for the city. Is
this a suitable location for an emergency response center? Why or why not? If no, where would you relocate
the response operation center?
On 3/11/2011 near HONSHU ISLAND, JAPAN (38.322°N, 142.369°E) at 5:46:23 (UTC), a magnitude 9.0
earthquake occurred. Due to the amount of water displaced from this earthquake, a tsunami was initiated. The
figure below details the manner that the tsunami travelled across the Pacific Ocean Basin. Use the figure below
to answer the following questions. The colors and divisions on this map represent where the tsunami is located
after one hour of time (lines labeled 5, 10, and 15 are 5, 10, and 15 hours post-earthquake). The star
represents the earthquake location, and also Osaka, Japan).
46410
5
46409
46403
21415
46402
21414
46408
46413
21416
46-419
Seattle
21419
46464
46407
21418
46411
Los Angeles
21413
46412
52404
51407
Hawaii
43412
52405
52402
43413
52403
32411
52406
51425
51406
3412
51425
54401
Figure 1 – Tsunami Wave Travel Times (http://www.ngdc.noaa.gov/hazard/dart/2011 konshu dart.html)
9. Using the following map, please shade in a run-up distance of 3 miles to determine what areas will be
inundated by the tsunami. IS CSUF in danger of being inundated by tsunami? How about your home?
Explain.
Glendale
Glendale
Beverly
Hills
Covina
Malibu
Pomona
Los Angeles
Pomora
Santa Monica
LAX
Chino Hills
Manhattan Beach
Normalt
Norwalk
CSUF
• Yorba Linda
Redondo Beach
Fullerton
Lakewood
Anaheim
Long Beach
Orange
مهمة
Santa Ana
Tustin
• Huntington
Beach
John Wayne Airport
Irvine
Santa Catalina
Island
Avalon
5 miles
SNewport Beach
6. Does this method of calculating the average speed of the tsunami provide a good approximation of the
actual speed of the wave at any given point? Why or why not? (Hint: Consider how tsunami waves trav
through the ocean).
7. What do you expect the severity of the tsunami to be like by the time it reaches California? Should we move
away from the beach?
8. The Newport-Inglewood Fault is located along the coastline in Southern California. Do a bit of research to
determine what type of fault this is. Do you think is has the ability to generate a major tsunami? Why or why
not?
Downloads/GEOL%20310T%20HW%204%20Tsunamis.pdf
1. There are many ways in which tsunamis can form but for this tsunami, explain using a couple sentences how
this tsunami was generated.
2. Use your map to estimate how long (in hours) it took for the tsunami to reach:
a. Osaka, Japan (the star)
b. Hawaii (station 51407)
C. Seattle
3. Approximately how far (in miles) did the tsunami travel from its source near Japan to Los Angeles (you can
use google to determine this)?
4. Approximately how long (in hours) did it take for the tsunami to travel from Japan to Los Angeles?
5. Given the total distance and total travel time from the two above questions, estimate the speed of the
tsunami in miles per hour (using measurements from question 3 and 4)? (please show your work)
NOAA EAVIGNALERNIERS FOR
ENVIRONMENTAL INFORMATION
Search
NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION
DAA > NESDIS > NCE (formerly NGDC) > Natural Hazards
Significant Earthquake Search – sorted by Date
1 Significant Earthquakes where (Year = 2011) and (Primary Magnitude = 9)
View parameter descriptions and statistical information by clicking on column headings.
For additional information about an earthquake event and links to damage photos, click on the links in the Addl Info and Tsu columns.
Earthquake Parameters
Earthquake Effects
Date
Assoc
Earthquake Location
Addi
EQ
Info
Deaths
Photos
Year
Mn
Houses
Destroyed
Num De
Sec Tsu
Vol
Name
Injuries
Num De
Mo
3
Dy Hr
11 5
Latitude
Focal
Depth
30
Damage
$ Mill De
MMI Int
Num
De
2011
Houses
Damaged
Num De
5618 4
Longitude
142.372
46
24.1 Tsu
Mag
9.1
*
JAPAN: HONSHU
38.297
1475
4
6157
4
4401.709
4
2473
4
Return to Significant Earthquake Database Search
NOAA > NESDIS > NCE (formerly NGDC) > Natural Hazards
Questions: haz infonoaa.gov
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