Is that a center tap tranformer just labelled differently?












1












$begingroup$


my transformer has a secondary winding of 0 - 12v - 24v



Is it just labelled differently and is it really a center tap where 12v would be the center, 0 would be -12v and 24 would be 12v?



Thanks!



transformer






transformer identification







share|improve this question









$endgroup$












  • $begingroup$
    It's not an autotransformer is it (basically just a big inductor with multiple output taps)? You can check by measuring resistance to see if the 0V and 0V are electrically connected to each other
    $endgroup$
    – Toor
    6 hours ago












  • $begingroup$
    @Toor thanks will check, in the mean time their website in french clearly makes a distinction between a regular transformer and autotransformer and the label says "transformer" so I would guess this is not an autotransformer. Getting the multimeter..
    $endgroup$
    – Mike Gleason jr Couturier
    6 hours ago










  • $begingroup$
    @Toor Can confirm: 0 and 0 are not connected to each other.. 0 and 12 and 24 are on the secondary, obviously 0 and 220 are on the primary side
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago






  • 3




    $begingroup$
    Yeah, so a normal center-tap transformer just labelled specifically for its intended use then.
    $endgroup$
    – Toor
    5 hours ago








  • 2




    $begingroup$
    You can. Just note that one half-winding will be loaded a more than the other half and will affect both voltage outputs.
    $endgroup$
    – Toor
    5 hours ago


















1












$begingroup$


my transformer has a secondary winding of 0 - 12v - 24v



Is it just labelled differently and is it really a center tap where 12v would be the center, 0 would be -12v and 24 would be 12v?



Thanks!



transformer






transformer identification







share|improve this question









$endgroup$












  • $begingroup$
    It's not an autotransformer is it (basically just a big inductor with multiple output taps)? You can check by measuring resistance to see if the 0V and 0V are electrically connected to each other
    $endgroup$
    – Toor
    6 hours ago












  • $begingroup$
    @Toor thanks will check, in the mean time their website in french clearly makes a distinction between a regular transformer and autotransformer and the label says "transformer" so I would guess this is not an autotransformer. Getting the multimeter..
    $endgroup$
    – Mike Gleason jr Couturier
    6 hours ago










  • $begingroup$
    @Toor Can confirm: 0 and 0 are not connected to each other.. 0 and 12 and 24 are on the secondary, obviously 0 and 220 are on the primary side
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago






  • 3




    $begingroup$
    Yeah, so a normal center-tap transformer just labelled specifically for its intended use then.
    $endgroup$
    – Toor
    5 hours ago








  • 2




    $begingroup$
    You can. Just note that one half-winding will be loaded a more than the other half and will affect both voltage outputs.
    $endgroup$
    – Toor
    5 hours ago
















1












1








1





$begingroup$


my transformer has a secondary winding of 0 - 12v - 24v



Is it just labelled differently and is it really a center tap where 12v would be the center, 0 would be -12v and 24 would be 12v?



Thanks!



transformer






transformer identification







share|improve this question









$endgroup$




my transformer has a secondary winding of 0 - 12v - 24v



Is it just labelled differently and is it really a center tap where 12v would be the center, 0 would be -12v and 24 would be 12v?



Thanks!



transformer






transformer identification




transformer identification






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 6 hours ago









Mike Gleason jr CouturierMike Gleason jr Couturier

34518




34518












  • $begingroup$
    It's not an autotransformer is it (basically just a big inductor with multiple output taps)? You can check by measuring resistance to see if the 0V and 0V are electrically connected to each other
    $endgroup$
    – Toor
    6 hours ago












  • $begingroup$
    @Toor thanks will check, in the mean time their website in french clearly makes a distinction between a regular transformer and autotransformer and the label says "transformer" so I would guess this is not an autotransformer. Getting the multimeter..
    $endgroup$
    – Mike Gleason jr Couturier
    6 hours ago










  • $begingroup$
    @Toor Can confirm: 0 and 0 are not connected to each other.. 0 and 12 and 24 are on the secondary, obviously 0 and 220 are on the primary side
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago






  • 3




    $begingroup$
    Yeah, so a normal center-tap transformer just labelled specifically for its intended use then.
    $endgroup$
    – Toor
    5 hours ago








  • 2




    $begingroup$
    You can. Just note that one half-winding will be loaded a more than the other half and will affect both voltage outputs.
    $endgroup$
    – Toor
    5 hours ago




















  • $begingroup$
    It's not an autotransformer is it (basically just a big inductor with multiple output taps)? You can check by measuring resistance to see if the 0V and 0V are electrically connected to each other
    $endgroup$
    – Toor
    6 hours ago












  • $begingroup$
    @Toor thanks will check, in the mean time their website in french clearly makes a distinction between a regular transformer and autotransformer and the label says "transformer" so I would guess this is not an autotransformer. Getting the multimeter..
    $endgroup$
    – Mike Gleason jr Couturier
    6 hours ago










  • $begingroup$
    @Toor Can confirm: 0 and 0 are not connected to each other.. 0 and 12 and 24 are on the secondary, obviously 0 and 220 are on the primary side
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago






  • 3




    $begingroup$
    Yeah, so a normal center-tap transformer just labelled specifically for its intended use then.
    $endgroup$
    – Toor
    5 hours ago








  • 2




    $begingroup$
    You can. Just note that one half-winding will be loaded a more than the other half and will affect both voltage outputs.
    $endgroup$
    – Toor
    5 hours ago


















$begingroup$
It's not an autotransformer is it (basically just a big inductor with multiple output taps)? You can check by measuring resistance to see if the 0V and 0V are electrically connected to each other
$endgroup$
– Toor
6 hours ago






$begingroup$
It's not an autotransformer is it (basically just a big inductor with multiple output taps)? You can check by measuring resistance to see if the 0V and 0V are electrically connected to each other
$endgroup$
– Toor
6 hours ago














$begingroup$
@Toor thanks will check, in the mean time their website in french clearly makes a distinction between a regular transformer and autotransformer and the label says "transformer" so I would guess this is not an autotransformer. Getting the multimeter..
$endgroup$
– Mike Gleason jr Couturier
6 hours ago




$begingroup$
@Toor thanks will check, in the mean time their website in french clearly makes a distinction between a regular transformer and autotransformer and the label says "transformer" so I would guess this is not an autotransformer. Getting the multimeter..
$endgroup$
– Mike Gleason jr Couturier
6 hours ago












$begingroup$
@Toor Can confirm: 0 and 0 are not connected to each other.. 0 and 12 and 24 are on the secondary, obviously 0 and 220 are on the primary side
$endgroup$
– Mike Gleason jr Couturier
5 hours ago




$begingroup$
@Toor Can confirm: 0 and 0 are not connected to each other.. 0 and 12 and 24 are on the secondary, obviously 0 and 220 are on the primary side
$endgroup$
– Mike Gleason jr Couturier
5 hours ago




3




3




$begingroup$
Yeah, so a normal center-tap transformer just labelled specifically for its intended use then.
$endgroup$
– Toor
5 hours ago






$begingroup$
Yeah, so a normal center-tap transformer just labelled specifically for its intended use then.
$endgroup$
– Toor
5 hours ago






2




2




$begingroup$
You can. Just note that one half-winding will be loaded a more than the other half and will affect both voltage outputs.
$endgroup$
– Toor
5 hours ago






$begingroup$
You can. Just note that one half-winding will be loaded a more than the other half and will affect both voltage outputs.
$endgroup$
– Toor
5 hours ago












3 Answers
3






active

oldest

votes


















3












$begingroup$

Not necessarily. If the transformer is rated to produce full output from either the 12V tap or the 24V tap, it could be that the winding from the 12 to 24V terminals is of a finer gage, since the current that could be drawn from the 24V tap would be half that you could draw at 12V. This you can determine by comparing the resistance of the 0-12 and 12-24 windings.



Would that matter for using it as a center-tapped +/- 12V transformer? Not much, the terminal voltage at the high side would be fractionally lower under load, but the overall heating compared to drawing the full power at a single tap would actually be less.






share|improve this answer









$endgroup$













  • $begingroup$
    I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago






  • 1




    $begingroup$
    I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
    $endgroup$
    – Phil G
    5 hours ago



















2












$begingroup$

I would guess that yes, it is just a regular center tap transformer. Assuming that's the case:



The outputs will be AC, so -12V doesn't really have any meaning. The 12V here will be 12V AC, and the 24 will be 24V AC.



If you make the center tap 0, then "LABEL 0" will be 12V, and "LABEL 24" will also be 12V (but they will be out of phase with each other).



Based on the labeling, I think it's fairly certain that this is a regular transformer, but I would do some continuity tests just to make sure.






share|improve this answer









$endgroup$













  • $begingroup$
    Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago



















2












$begingroup$

0V is arbitrary as it is floating secondary centre-tapped coil.



so you can relabel with 3 choices;



0     : 12Vac : 24Vac   

12Vac : 0V    : 12Vac   +180 deg         

24Vac : 12Vac :  0V





share|improve this answer









$endgroup$













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    3 Answers
    3






    active

    oldest

    votes








    3 Answers
    3






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    3












    $begingroup$

    Not necessarily. If the transformer is rated to produce full output from either the 12V tap or the 24V tap, it could be that the winding from the 12 to 24V terminals is of a finer gage, since the current that could be drawn from the 24V tap would be half that you could draw at 12V. This you can determine by comparing the resistance of the 0-12 and 12-24 windings.



    Would that matter for using it as a center-tapped +/- 12V transformer? Not much, the terminal voltage at the high side would be fractionally lower under load, but the overall heating compared to drawing the full power at a single tap would actually be less.






    share|improve this answer









    $endgroup$













    • $begingroup$
      I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago






    • 1




      $begingroup$
      I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
      $endgroup$
      – Phil G
      5 hours ago
















    3












    $begingroup$

    Not necessarily. If the transformer is rated to produce full output from either the 12V tap or the 24V tap, it could be that the winding from the 12 to 24V terminals is of a finer gage, since the current that could be drawn from the 24V tap would be half that you could draw at 12V. This you can determine by comparing the resistance of the 0-12 and 12-24 windings.



    Would that matter for using it as a center-tapped +/- 12V transformer? Not much, the terminal voltage at the high side would be fractionally lower under load, but the overall heating compared to drawing the full power at a single tap would actually be less.






    share|improve this answer









    $endgroup$













    • $begingroup$
      I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago






    • 1




      $begingroup$
      I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
      $endgroup$
      – Phil G
      5 hours ago














    3












    3








    3





    $begingroup$

    Not necessarily. If the transformer is rated to produce full output from either the 12V tap or the 24V tap, it could be that the winding from the 12 to 24V terminals is of a finer gage, since the current that could be drawn from the 24V tap would be half that you could draw at 12V. This you can determine by comparing the resistance of the 0-12 and 12-24 windings.



    Would that matter for using it as a center-tapped +/- 12V transformer? Not much, the terminal voltage at the high side would be fractionally lower under load, but the overall heating compared to drawing the full power at a single tap would actually be less.






    share|improve this answer









    $endgroup$



    Not necessarily. If the transformer is rated to produce full output from either the 12V tap or the 24V tap, it could be that the winding from the 12 to 24V terminals is of a finer gage, since the current that could be drawn from the 24V tap would be half that you could draw at 12V. This you can determine by comparing the resistance of the 0-12 and 12-24 windings.



    Would that matter for using it as a center-tapped +/- 12V transformer? Not much, the terminal voltage at the high side would be fractionally lower under load, but the overall heating compared to drawing the full power at a single tap would actually be less.







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered 5 hours ago









    Phil GPhil G

    2,5571412




    2,5571412












    • $begingroup$
      I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago






    • 1




      $begingroup$
      I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
      $endgroup$
      – Phil G
      5 hours ago


















    • $begingroup$
      I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago






    • 1




      $begingroup$
      I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
      $endgroup$
      – Phil G
      5 hours ago
















    $begingroup$
    I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago




    $begingroup$
    I get 1 ohm resistence between 0 and 12, 1 ohm between 12 and 24 and 2 ohms between 0 and 24... So I guess this really is a center tap?
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago




    1




    1




    $begingroup$
    I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
    $endgroup$
    – Phil G
    5 hours ago




    $begingroup$
    I'd think so. While you can get more out of a given core (since you have to get all the windings through a fixed window size) by fine-tuning the wire sizes, there's the additional cost of winding different wire sizes, so keeping the windings the same is likely cheaper. More effective still for a 12V OR 24V secondary is to have two separate winding that can then be connected series or parallel to maximize winding utilization.
    $endgroup$
    – Phil G
    5 hours ago













    2












    $begingroup$

    I would guess that yes, it is just a regular center tap transformer. Assuming that's the case:



    The outputs will be AC, so -12V doesn't really have any meaning. The 12V here will be 12V AC, and the 24 will be 24V AC.



    If you make the center tap 0, then "LABEL 0" will be 12V, and "LABEL 24" will also be 12V (but they will be out of phase with each other).



    Based on the labeling, I think it's fairly certain that this is a regular transformer, but I would do some continuity tests just to make sure.






    share|improve this answer









    $endgroup$













    • $begingroup$
      Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago
















    2












    $begingroup$

    I would guess that yes, it is just a regular center tap transformer. Assuming that's the case:



    The outputs will be AC, so -12V doesn't really have any meaning. The 12V here will be 12V AC, and the 24 will be 24V AC.



    If you make the center tap 0, then "LABEL 0" will be 12V, and "LABEL 24" will also be 12V (but they will be out of phase with each other).



    Based on the labeling, I think it's fairly certain that this is a regular transformer, but I would do some continuity tests just to make sure.






    share|improve this answer









    $endgroup$













    • $begingroup$
      Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago














    2












    2








    2





    $begingroup$

    I would guess that yes, it is just a regular center tap transformer. Assuming that's the case:



    The outputs will be AC, so -12V doesn't really have any meaning. The 12V here will be 12V AC, and the 24 will be 24V AC.



    If you make the center tap 0, then "LABEL 0" will be 12V, and "LABEL 24" will also be 12V (but they will be out of phase with each other).



    Based on the labeling, I think it's fairly certain that this is a regular transformer, but I would do some continuity tests just to make sure.






    share|improve this answer









    $endgroup$



    I would guess that yes, it is just a regular center tap transformer. Assuming that's the case:



    The outputs will be AC, so -12V doesn't really have any meaning. The 12V here will be 12V AC, and the 24 will be 24V AC.



    If you make the center tap 0, then "LABEL 0" will be 12V, and "LABEL 24" will also be 12V (but they will be out of phase with each other).



    Based on the labeling, I think it's fairly certain that this is a regular transformer, but I would do some continuity tests just to make sure.







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered 6 hours ago









    DrewDrew

    1,8561513




    1,8561513












    • $begingroup$
      Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago


















    • $begingroup$
      Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
      $endgroup$
      – Mike Gleason jr Couturier
      5 hours ago
















    $begingroup$
    Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago




    $begingroup$
    Thanks for your answer, As I said above in a comment: 0 and 0 are not connected to each other.. 0 and 12 and 24 are connected on the secondary, 0 and 220 are connected on the primary side. (connected I mean near 0 resistance)
    $endgroup$
    – Mike Gleason jr Couturier
    5 hours ago











    2












    $begingroup$

    0V is arbitrary as it is floating secondary centre-tapped coil.



    so you can relabel with 3 choices;



    0     : 12Vac : 24Vac   
    
12Vac : 0V    : 12Vac   +180 deg         
    
24Vac : 12Vac :  0V





    share|improve this answer









    $endgroup$


















      2












      $begingroup$

      0V is arbitrary as it is floating secondary centre-tapped coil.



      so you can relabel with 3 choices;



      0     : 12Vac : 24Vac   
      
12Vac : 0V    : 12Vac   +180 deg         
      
24Vac : 12Vac :  0V





      share|improve this answer









      $endgroup$
















        2












        2








        2





        $begingroup$

        0V is arbitrary as it is floating secondary centre-tapped coil.



        so you can relabel with 3 choices;



        0     : 12Vac : 24Vac   
        
12Vac : 0V    : 12Vac   +180 deg         
        
24Vac : 12Vac :  0V





        share|improve this answer









        $endgroup$



        0V is arbitrary as it is floating secondary centre-tapped coil.



        so you can relabel with 3 choices;



        0     : 12Vac : 24Vac   
        
12Vac : 0V    : 12Vac   +180 deg         
        
24Vac : 12Vac :  0V






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 5 hours ago









        Sunnyskyguy EE75Sunnyskyguy EE75

        67.4k22397




        67.4k22397






























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            CARDNET

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            CARDNET は日本カードネットワークが運営するクレジット決済ネットワーク。日本カードネットワークの略称としてもCARDNETが使用されている。 事件・事故 2017年4月15日午前11時8分からクレジットカードの決済がしづらくなる障害が発生した。障害は同日午後5時18分に復旧した。原因は、複数あるCARDNETセンターの拠点のうち1つで、2重化してあるL3スイッチの片方が故障し、1系統にトラフィックが集中したことによる輻輳が発生したため。対処としては、故障したL3スイッチ交換とシステム再起動が行われた [1] 。 出典 ^ 金子寛人 ( 2017年4月17日 ). “CARDNETのクレジット決済に6時間強障害、原因はL3スイッチ故障”. 日経コンピュータ. 2018年10月18日 閲覧。 この項目は、コンピュータに関連した 書きかけの項目 です。この項目を加筆・訂正などしてくださる協力者を求めています（PJ:コンピュータ/P:コンピュータ）。 この項目は、経済に関連した 書きかけの項目 です。この項目を加筆・訂正などしてくださる協力者を求めています（ポータル 経済学、プロジェクト 経済）。 This page is only for reference, If you need detailed information, please check here
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            Boot-repair Failure: Unable to locate package grub-common:i386

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            0 I am on a system dual-booting Windows and Debian (usually using the latter), and a recent Windows update appears to have wreaked havoc on the Debian boot system. I managed to boot Windows again, but not Linux. Following online suggestions, I created a Live USB of Ubuntu, and booted from that. Then I have installed and run the boot-repair utility. The utility instructs me to type several lines including sudo chroot "/mnt/boot-sav/sda6" apt-get purge -y grub*-common grub-common:i386 To which I receive the error E: Unable to locate package grub-common:i386 I am given to understand the issue may have to do with having UEFI vs BIOS (I believe I have UEFI), but do not understand this well. In any case I have subsequently run the boot-repair BootInfo Summary utility which created the following file h...
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            濃尾地震

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            濃尾地震 『岐阜市街大地震之図』 歌川国利画 本震 発生日 1891年（明治24年）10月28日 発生時刻 6時38分50秒（JST） 震央 日本 岐阜県本巣郡西根尾村（現・本巣市） 北緯35度35分 東経136度20分（ 地図 ） 規模    マグニチュード（M）8.0 最大震度    震度7： 注1 福井県今立郡鯖江町、愛知県葉栗郡大田島村、東春日井郡勝川村 地震の種類 直下型地震 被害 死傷者数 死者7,273人、負傷者17,175人 注1：当時の震度階級では「激烈」 プロジェクト:地球科学 プロジェクト:災害 テンプレートを表示 濃尾地震 （のうびじしん）は、1891年（明治24年）10月28日に濃尾地方で発生した、日本史上最大の内陸地殻内地震。「 美濃・尾張地震 （みの・おわりじしん）」とも呼ばれている。辛卯の年に発生したことから 辛卯震災 と呼んでいる報告書もある。 目次 1 概要 1.1 震源断層 2 被害 3 各地の震度 4 前兆現象 5 報道 6 学術的な意義 7 地震防災 8 脚注 9 関連項目 10 外部リンク 概要 濃尾地震発生当時の根尾谷断層 濃尾地震を引き起こした根尾谷断層 写真中央を斜めに走る段差が根尾谷断層 濃尾地震は、1891年10月28日6時38分50秒に発生した。震源は、岐阜県本巣郡西根尾村（現・本巣市）、北緯35度35分、東経136度20分付近。河角廣 (1951) は岐阜市付近（北緯35.6度、東経136.6度）に震央を仮定し規模 M K = 7.0 を与え [1] 、マグニチュードは M = 8.4 に換算されているが、明治・大正期の地震については0.5程度大きく見積もられているとされる [2] 。また、震央距離と震度との関係など当時のデータから後にM8.0 [3] とも推定される。アメリカ地質調査所 (USGS) でも8.0としている [4] 。「根尾谷断層帯」が活動した典型的な内陸地殻内地震（いわゆる直下型地震）であり、これは記録が残っている日本の内陸...
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