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Forum for earth sensitives, world events, disasters, dreams, prophecies, visions, predictions.. everything and anything welcome here!


    Deep Earthquakes

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    Don in Hollister


    Posts : 137
    Join date : 2010-02-17
    Age : 89
    Location : Hollister, California

    Deep Earthquakes Empty Deep Earthquakes

    Post  Don in Hollister Thu 18 Feb 2010, 11:01 am

    Hi All. Deep quakes in that area are somewhat common and are not fully understood as to how they occur. Seismologist/seismologists are having a ball with them. Just about the time they think they have the answer along comes another deep quake that shoots the theory down.

    Deep earthquakes were discovered in the 1920s, but they remain a subject of contention today. The reason is simple: they aren't supposed to happen. Yet they account for about 20 percent of all earthquakes.

    Until about 10 years ago the consensus candidate for the energy of very deep quakes was the olivine-spinel phase change, or transformational faulting. The idea was that little lenses of olivine-spinel would form, gradually expand and eventually connect in a sheet. Olivine-spinel is softer than olivine, therefore the stress would find an avenue of sudden release along those sheets. Layers of melted rock might form to lubricate the action, similar to surface superfaults, the shock might trigger more transformational faulting, and the quake would slowly grow.

    Then the great Bolivia deep earthquake of 9 June 1994 occurred, a magnitude 8.3 event at a depth of 636 km. Many workers thought that to be too much energy for the transformational faulting model to account for. Other tests have failed to confirm the model. But not all agree. Since then, deep-quake specialists have been trying new ideas, refining old ones, and having a ball. They have learned there is really no point in going to the area where the quake occurred because nothing will be seen. Heck, there even times the people living directly above the quake never feel it, people living a couple 1000 miles away felt it as gentle swaying motion. More people living in Canada felt the Bolivia quake then there were in Bolivia.

    As you can see from the map there are quite a large number of deep quakes in the area of the most recent deep quake. All of the quakes are deeper the 250 miles and are 5.0M and a larger. As you can see there is one spot that seems to have the majority of them. This is the one thing the puzzles scientist more then anything else. The don't know if they are following a fault or there is some other mechanism at work here they don't understand or even have any ideas as to why this occurs.

    I have been in studying fault and quakes for more then 47 years now and I have learned one thing if I never learn anything else. Don't put your theory in stone for one morning you may wake up and find your stone no longer exists. Take Care...Don

    http://www.science-frontiers.com/sf095/sf095g13.htm

    http://my.opera.com/nielsol/blog/show.dml/2315028

    https://2img.net/h/i5.photobucket.com/albums/y151/Quakemeister/DeepquakesSeaofJapanarea.jpg?t=1266489534

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