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  1. milan2003_07's Avatar
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    #1

    calculating the indices of geomagnetic activity

    Hello,

    "As a rule, the horizontal component of the field (H-component) is used for calculating the indices of geomagnetic activity and analyzing variations of the Earth’s magnetic field during magnetic storms".

    Do we need to insert "the" before "indices"? There are several main indices of geomagnetic activity used all over the world and recognised by geophysicists, but the sentence says nothing about any particular indices, but just mentions their existence and application. That's why I have doubts about using "the".

    Thanks

  2. Eckaslike's Avatar
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    #2

    Re: calculating the indices of geomagnetic activity

    Hello,

    I think I agree with you that, in the context presented, "the" should not be used. This is because the H-component is used in the calculation of all these different, recognised, indices around the world, rather than in just one specific set.
    Last edited by Eckaslike; 24-Jul-2015 at 13:13. Reason: For clarity.

  3. milan2003_07's Avatar
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    #3

    Re: calculating the indices of geomagnetic activity

    Thanks a lot! I have one more similar question about using "the".

    "The mathematical model suggested in the paper is particularly capable of reflecting the characteristic variation and local perturbations of the geomagnetic field during the periods of increased geomagnetic activity".

    Do we need "the" here?

    Thanks

  4. Eckaslike's Avatar
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    #4

    Re: calculating the indices of geomagnetic activity

    Again, I would say "the" should not be used if you are talking about periods of increased geomagnetic activity in general. If you were talking about one, specific, period of increased activity you would use "the".

    "local perturbations of the geomagnetic field during the periods of increased geomagnetic activity". [Periods in general].

    "local perturbations of the geomagnetic field during the periods of increased geomagnetic activity". [One specific period].

    I should just add that, you could also talk about specific periods of geomagnetic activity.

    "local perturbations of the geomagnetic field during the periods of increased geomagnetic activity". [Several specific periods, usually in the context of something previously mentioned].

    Does this help? Are you talking in general about these periods, or about one or more specific periods?
    Last edited by Eckaslike; 24-Jul-2015 at 14:21. Reason: Additional thoughts and for clarity.

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    #5

    Re: calculating the indices of geomagnetic activity

    Rover, may I know why my answer was wrong?
    I am not a teacher.

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    #6

    Re: calculating the indices of geomagnetic activity

    Because of these two incorrect statements:

    Activity" should be plural.
    "Earth" should not be capitalized.
    Last edited by Rover_KE; 24-Jul-2015 at 23:53.

  5. milan2003_07's Avatar
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    #7

    Re: calculating the indices of geomagnetic activity

    Thanks for your help! I know everyone can express their opinion in the forum including native-speakers and learners. However, non-native-speakers should always be careful when suggesting something and they should always mention that they are non-native-speakers. I remember I posted replies myself some time ago, but I always mentioned where I'm from.

    I think two posts above can be deleted since they contribute nothing to the thread.

    Anyway, thanks to everyone for their help!

  6. Piscean's Avatar
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    #8

    Re: calculating the indices of geomagnetic activity

    Quote Originally Posted by milan2003_07 View Post
    However, non-native-speakers [...]should always mention that they are non-native-speakers.
    That seems a little hard on those non-native speakers in the forum who give excellent responses.

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    #9

    Re: calculating the indices of geomagnetic activity

    Quote Originally Posted by Rover_KE View Post
    Because of these two incorrect statements:

    1. Activity" should be plural.
    2. "Earth" should not be capitalized.
    1. As a rule, the horizontal component of the field (H-component) is used for calculating the indices of geomagnetic activity and analyzing variations of the Earth’s magnetic field during magnetic storm.

    OP's statement above is meant to be general. Activity is a countable noun. If it is singular, shouldn't it be written "a geomagnetic activity" rather than without the indefinte article? Why shouldn't it be plural if it refers to activities in general? The same applies to "magnetic storm".

    2. It seems from the sample sentences given here, earth is not capitalized:
    http://fraze.it/n_search.jsp?hardm=1...=0&p=3&q=earth

    Also, it says here that it is not capitalized if you have "the" preceding" it:
    http://grammarist.com/style/earth/
    Last edited by tedmc; 25-Jul-2015 at 04:27.
    I am not a teacher.

  7. Matthew Wai's Avatar
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    #10

    Re: calculating the indices of geomagnetic activity

    Quote Originally Posted by tedmc View Post
    Activity is a countable noun.
    It could be uncountable according to http://www.oxfordlearnersdictionarie...ity?q=activity

    Quote Originally Posted by tedmc View Post
    2. It seems from the sample sentences given here, earth is not capitalized:
    http://fraze.it/n_search.jsp?hardm=1...=0&p=3&q=earth
    I found similar examples at http://www.oxfordlearnersdictionarie...arth_1?q=earth
    Both 'the Earth' and 'the earth' are used above.
    I am not a teacher.

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