7.3 earthquake in the South Atlantic - Sitcoms Online Message Boards

Brent88 · 01-02-2006, 02:59 AM

http://earthquake.usgs.gov/recenteqs...kes/ushkac.htm

Good news for the U.S. is it's pretty far south.

Fleet · 01-02-2006, 11:01 PM

That's quite a large quake (the mag. 7 range is considered a "large" earthquake).

I had the news on a lot today because of the S. California storm and haven't seen anything about this quake.

Chelsea · 01-03-2006, 01:50 AM

Quote:

Originally Posted by Fleet

That's quite a large quake

One thing I've learned over the years: When a person living in California considers a quake "large", it MUST be.

Fleet · 01-03-2006, 10:00 PM

Quote:

Originally Posted by Seth

One thing I've learned over the years: When a person living in California considers a quake "large", it MUST be.

Yeah, it was big. In between the 1989 San Francisco quake (6.9) and the 1952 Kern County quake (7.5).
6.0 to 6.9 is classified as "moderate."
7.0 to 7.9 is "major."
8.0 and higher "great."

Ireneparalegal · 01-03-2006, 10:02 PM

believe us Californians...that is huge...MASSIVE.

The Richter magnitudes are based on a logarithmic scale (base 10). What this means is that for each whole number you go up on the Richter scale, the amplitude of the ground motion recorded by a seismograph goes up ten times. Using this scale, a magnitude 5 earthquake would result in ten times the level of ground shaking as a magnitude 4 earthquake (and 32 times as much energy would be released). To give you an idea how these numbers can add up, think of it in terms of the energy released by explosives: a magnitude 1 seismic wave releases as much energy as blowing up 6 ounces of TNT. A magnitude 8 earthquake releases as much energy as detonating 6 million tons of TNT. Pretty impressive, huh? Fortunately, most of the earthquakes that occur each year are magnitude 2.5 or less, too small to be felt by most people.

01-02-2006, 02:59 AM	#1
Brent88 Member Forum Star Join Date: Aug 01, 2003 Location: Alabama Posts: 16,174	7.3 earthquake in the South Atlantic http://earthquake.usgs.gov/recenteqs...kes/ushkac.htm Good news for the U.S. is it's pretty far south.
	__________________ Brent

01-02-2006, 11:01 PM	#2
Fleet Mansions, limousines & H-ween Forum Star Join Date: Jan 06, 2002 Location: Northridge/Porter Ranch, California Posts: 15,625	That's quite a large quake (the mag. 7 range is considered a "large" earthquake). I had the news on a lot today because of the S. California storm and haven't seen anything about this quake.
	__________________ 1976 Cadillac Fleetwood Seventy-Five Limousine.

01-03-2006, 10:02 PM	#5
Ireneparalegal LEGAL SPICE ;) Forum Legend Join Date: Jul 25, 2005 Location: OXNARD, CA - WHERE THE DALLAS COWBOYS TRAIN & PRACTICE Posts: 38,691	believe us Californians...that is huge...MASSIVE. The Richter magnitudes are based on a logarithmic scale (base 10). What this means is that for each whole number you go up on the Richter scale, the amplitude of the ground motion recorded by a seismograph goes up ten times. Using this scale, a magnitude 5 earthquake would result in ten times the level of ground shaking as a magnitude 4 earthquake (and 32 times as much energy would be released). To give you an idea how these numbers can add up, think of it in terms of the energy released by explosives: a magnitude 1 seismic wave releases as much energy as blowing up 6 ounces of TNT. A magnitude 8 earthquake releases as much energy as detonating 6 million tons of TNT. Pretty impressive, huh? Fortunately, most of the earthquakes that occur each year are magnitude 2.5 or less, too small to be felt by most people.
	__________________ DALLAS COWBOYS ARE HERE AT TRAINING CAMP!!!