Coastal & Marine Geology InfoBank

Home FACS Activities Atlas Geology School Related Sites More

USGS CMG InfoBank: A Moderate Earthquake

Skip navigational links
Loading
Dictionaries: Our Mapping Systems   The USGS and Science Education   USGS Fact Sheets   Topics   Keywords   Data Dictionary   Metadata Dictionary   Computer Terminology   Digital Formats  
InfoBank Terms: Activity ID   activity overview   crew   digital data   formal metadata   lines   metadata   NGDC   port stops   project/theme   region   ship   stations   time   virtual globe   year  
Data Types: bathymetry   biological   geochemical   gravity   ground penetrating radar   imaging   LIDAR   logs   magnetics   metering equipment   navigation   samples   seismic   total station   definitions disclaimer  
Data Formats: ARC coverage   E00   FGDC metadata   gridded/image   imaging   material   scattered/swath   Shapefile   vector/polygon  
Comment: 15:03 - 16:20 (01:17)
Source: Annenberg/CPB Resources - Earth Revealed - 25. Living With Earth, Part I
Keywords: "Loma Prieta Earthquake", earthquake, magnitude, "San Francisco Earthquake", "San Francisco", "Marina District"

Our transcription: As terrifying as this tremor was, geologists call it a "moderate" rather than a "great" earthquake.
The magnitude of the 1906 quake, which also shook the San Francisco Bay region, has been estimated at 8.3 meaning it released about 60 times more energy than the Loma Prieta quake.
Nonetheless, there is a chilling irony that links the two events.
When California staged an international exposition in 1915, the City of San Francisco wanted to divert world attention from the devastating quake that had rocked the area nine years earlier.
In so doing, it hoped to market itself as a viable Pacific port.
This led to the building of exposition structures in the Marina district.
The materials selected to fill in the shallow water of the marina were a combination of rubble from the 1906 quake, and un-compacted mud and sand.
Seventy-four years later, this community built atop the rubble of one earthquake would suffer catastrophe from another.

Geology School Keywords
Skip footer navigational links

Coastal and Marine Science Centers:  Pacific   St. Petersburg   Woods Hole  
InfoBank   Coastal and Marine Geology Program   Geologic Information   Ask-A-Geologist   USGS Disclaimer  


Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/08.02.14.html
Page Contact Information: InfoBank staff
Page Last Modified: Thu Oct 31 04:28:16 PDT 2013  (chd)