{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture 3 - Earthquakes

Lecture 3 - Earthquakes - Lecture 3 Earthquakes A...

Info icon This preview shows pages 1–17. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 3 Earthquakes
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
A time-travel graph is used to find the distance to the epicenter Figure 8.10
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 4
5 01/26/12 zpeng GT seminar Magnitude 8.8 OFFSHORE MAULE, CHILE Magnitude 8.8 OFFSHORE MAULE, CHILE Saturday, February 27, 2010 at 06:34:17 UTC Saturday, Global record section The global surface wave displacements around the globe are shown. The closest shown station is in Argentina and the most distant one is in Mongolia. A 6.9 aftershock is visible for comparative scale near 90 minutes after the mainshock.
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Earthquake Magnitude Local Magnitude (M L ) Often measured using the Richter scale Based on the amplitude of the largest seismic wave Each unit of Richter magnitude equates to roughly a 32-fold energy increase Does not estimate adequately the size of very large earthquakes
Image of page 6
Most Seismic Energy is Released in Large Earthquakes !
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
What factors control the stability of structures during an Earthquake?
Image of page 8
Rock Type and Shaking Intensity the amplitude of shaking is greatest on unconsolidated sediment and artificial fill Busch, ed., 2003
Image of page 9

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Earthquake Destruction Destruction results from Ground shaking Liquefaction of the ground Saturated material turns fluid Underground objects may float to surface Tsunami, or seismic sea waves Landslides and ground subsidence Fires
Image of page 10
low income housing = unreinforced masonry Earthquakes Do Not Kill People, Bad Buildings Do!
Image of page 11

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Earthquake Engineering base isolation reduces the earthquake-generated forces acting on buildings
Image of page 12
Destruction from Earthquakes road collapse building collapse fire
Image of page 13

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
1999 Mw7.6 Chi-Chi Earthquake (Taiwan)
Image of page 14
1994 Northridge, CA Earthquake
Image of page 15

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Damage to the Bay Bridge, connecting San Francisco and Oakland, from the October 17, 1989, Loma Prieta earthquake.
Image of page 16
Image of page 17
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern