Earthquake presentation
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Transcript of Earthquake presentation
EARTHQUAKES
SEAN ROBERTSONCHRISTIAN LESSEY
NATE BOWERS
DECEMBER 12, 2013
• Earthquakes can happen anywhere • Missouri• Florida• California• Utah• These are just a few places, not a full list
Earthquakes
EARTHQUAKES• Most earthquakes happen in the ocean
however
• Alaska has a lot since 1899 to present it has had 49 major earthquakes M 7.0 or higher
• Every state in the U.S. has had an earthquake
Ring of Fire
Earthquakes in Alaska
• March 9 1957 Andreanof Island has a M 8.6
• Bridges are damaged docks destroyed and it even caused Mount Vsevidof to Erupt which was dormant for 200 yrs.
• Caused a Tsunamis which continued to Hawaii, California, Chile, El Salvador, and Japan
• More than 300 aftershocks where reported
Alaska
• They also had earthquakes on March 12, 14, 16th all on Andreanof Island
• On the 9th there was also an earthquake on Fox island
• They were all over M 7.0
Alaska
• July 10, 1958 Lituya Bay, Alaska has a M 7.7 earthquake
• Not much damage to man made works minimal since there was not much in alaska
• Landslides reported in the mountains
Alaska
Earthquakes in Alaska
Practice
ALARM SOUND and DRILL
http://www.youtube.com/watch?v=bAHNhtRT50A
Great Shake Out Drills
• Drop• Cover• Hold on
Steps during and Earthquake
• http://www.youtube.com/watch?v=aOyopQ48Wp4
• http://www.youtube.com/watch?feature=player_detailpage&v=nMc3M4rrL_w
Siren
The Great Alaskan Earthquake of 1964
The Initial Event•Occurred Friday, march 27th 1964 at 5:36 P.M.
•Lasted three minutes
Aftershocks• Thousands of large
aftershocks that were felt up to three weeks after the initial event
• Caused many landslides and subsidence
• Up to magnitude 7• Some occurred up to
a year later
Epicenter
• Epicenter was located 12.4 miles north of Prince William Sound, 78 miles east of Anchorage
The earthquake registered at 9.2Mw
The Damage
• Caused $311 million (2.26 billion in current U.S. dollars) in Alaska and other places
• Cleanup took 15+ years to complete
Tsunamis and Surge Waves
• The quake and its aftershocks created tsunamis that caused damage in California, Hawaii and Oregon
• The tsunamis were up to 30ft tall • Some water levels were up to 80ft above sea
level• The towns of Whittier, Valdez, and Kodiak
were almost completely destroyed
Surge Wave Damage
Kodiak, AK
Surge Wave Damage
Seward, AK
Deaths Caused
• 128 people killed– 113 from the tsunamis– 15 from the earthquake
• The death toll would have been much greater had the quake occurred present day
Subsidence
• The earthquake created grabens up to 8ft deep
Tectonic Uplift
Both of these areas were more than 30ft underwater before the event. The quake caused the land in some places to rise so rapidly that trees were torn in half.
Fissures
The earthquake left large fissures in roads and bedrock, some were up to 6ft wide
Earthquakes
Seismic waves & Destruction of property
• Different motions of Earthquakes.
• Are the fastest wavesand are the first waves recorded by seismographs.Some call P-waves push-pull wave because of the way they contract and expand as they are traveling
Visual example of a p-wave
S-Waves can’t travel through liquids or gases. They require rigid material like ground, rock, roads or buildings
Visual example of a S-wave
Human interaction• Base isolation bearings
Elastic Cables Steel frame Shoes Steel fuses (in blue)
SOURCES FOR EARTHQUAKE PROJECT.
HTTP://EARTHQUAKE.USGS.GOV/EARTHQUAKES/STATES/EVENTS/1964_03_28.PHP
HTTP://LIBRARYPHOTO.CR.USGS.GOV/CGI-BIN/SEARCH.CGI?SEARCH_MODE=NOPUNCT&FREE_FORM=ALASKA&FREE_FORM=EARTHQUAKE&FREE_FORM=&FREE_FORM=
HTTP://WWW.DRGEORGEPC.COM/TSUNAMI1964CANADA.HTML
SOURCES FOR EARTHQUAKE PROJECT.
MCEER,.BUFFALO.EDU/INFO SERVICE/REFERENCE.WWW.POPULAR MECHANICS.COMBRUCE A. BOLT, EARTHQUAKES: A PRIMER WH FREEMAN AND COMPANYEARTH SKY.ORG/EARTHWWW.LAMIT.RO/EARTHQUAKESIMPLY GEOLOGY. WORD PRESS.COM