Can anybody tell me why almost ALL earthquakes are at a dept of EXACTLY 10KM ????? | |
Anonymous Coward (OP) User ID: 556010 Netherlands 09/30/2009 07:08 AM Report Abusive Post Report Copyright Violation | |
Anonymous Coward (OP) User ID: 556010 Netherlands 09/30/2009 07:11 AM Report Abusive Post Report Copyright Violation | finally a thread I can answer myself: ...whereas default depths of 5 or 10 km are often used in mid-continental areas and on mid-ocean ridges since earthquakes in these areas are usually shallower than 33 km. [link to earthquake.usgs.gov] |
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jotta User ID: 783089 United Kingdom 09/30/2009 07:14 AM Report Abusive Post Report Copyright Violation | Q: Why do so many earthquakes occur at a depth of 10km? A: 10 km is a "fixed depth". Sometimes data are too poor to compute a reliable depth for an earthquake. In such a case, the depth is assigned to be 10 km. In many areas around the world, reliable depths tend to average 10 km or close to it. For example, if we made a histogram of the reliable depths in such an area, we'd expect to see a peak around 10 km. Thus, if we don't know the depth, 10 km is a reasonable guess. We used to use 33 km. Increased understanding indicates that 10 km is more likely. Some areas, like subduction zones, are known to have many earthquakes much deeper than 10 km. In those areas, probably a larger fixed depth would be appropriate. The most common reason for having to fix the depth is that the earthquake occurred too far from the nearest seismic station. A useful rule of thumb is that a reliable depth requires that the distance from the epicenter to the nearest station must be less than the depth of the earthquake. Modern computational and theoretical advances can now produce reliable depths at greater distances from the nearest station, so the rule of thumb does not always apply nowadays. However, the rule of thumb does illustrate one conclusion: fixed depths are more common for shallow earthquakes than for deep ones. from >> [link to earthquake.usgs.gov] |
Anonymous Coward User ID: 783134 United States 09/30/2009 07:21 AM Report Abusive Post Report Copyright Violation | Quoting: Anonymous Coward 556010 No, you're not... HAARP +1 |
Anonymous Coward User ID: 550600 Canada 09/30/2009 07:35 AM Report Abusive Post Report Copyright Violation | Q: Why do so many earthquakes occur at a depth of 10km? Quoting: jotta 783089A: 10 km is a "fixed depth". Sometimes data are too poor to compute a reliable depth for an earthquake. In such a case, the depth is assigned to be 10 km. In many areas around the world, reliable depths tend to average 10 km or close to it. For example, if we made a histogram of the reliable depths in such an area, we'd expect to see a peak around 10 km. Thus, if we don't know the depth, 10 km is a reasonable guess. We used to use 33 km. Increased understanding indicates that 10 km is more likely. Some areas, like subduction zones, are known to have many earthquakes much deeper than 10 km. In those areas, probably a larger fixed depth would be appropriate. The most common reason for having to fix the depth is that the earthquake occurred too far from the nearest seismic station. A useful rule of thumb is that a reliable depth requires that the distance from the epicenter to the nearest station must be less than the depth of the earthquake. Modern computational and theoretical advances can now produce reliable depths at greater distances from the nearest station, so the rule of thumb does not always apply nowadays. However, the rule of thumb does illustrate one conclusion: fixed depths are more common for shallow earthquakes than for deep ones. from >> [link to earthquake.usgs.gov] |
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the mighty Atom User ID: 26834349 Japan 11/05/2012 12:50 PM Report Abusive Post Report Copyright Violation | I know a old, very old Thread but do someone found "the real Explanation"? What is the reason for the 10Km Earthquakes? I have heard a very logical Explanation: "At exact 10Km Depth the Pressure is that high that the Ground-Water becomes Steam and expand" Could this be the Reason why we see soooooo many Quakes at 10Km? G.Y.!B.E. |
Anonymous Coward User ID: 23367695 Canada 11/05/2012 12:53 PM Report Abusive Post Report Copyright Violation | I noticed the same and wondered why. ...and due to the scientific odds of that NOT happening I concluded that the earthquakes were obviously engineered. You'd think they change it up every once 'n awhile to make it appear as though the earth randomly created these quakes...but no ..its like a prize marker. in my humblest of opinions of course |
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the mighty Atom User ID: 26834349 Japan 11/05/2012 01:24 PM Report Abusive Post Report Copyright Violation | |
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Iolair User ID: 27066720 Germany 11/05/2012 08:02 PM Report Abusive Post Report Copyright Violation | |
the mighty Atom User ID: 27087957 Japan 11/06/2012 12:11 PM Report Abusive Post Report Copyright Violation | I know a old, very old Thread Quoting: the mighty Atom but do someone found "the real Explanation"? What is the reason for the 10Km Earthquakes? I have heard a very logical Explanation: "At exact 10Km Depth the Pressure is that high that the Ground-Water becomes Steam and expand" Could this be the Reason why we see soooooo many Quakes at 10Km? Is there someone who know the the Law of Physics and could confirm that the Water get to Steam at 10 Km Depth??? G.Y.!B.E. |
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