Keyword | CPC | PCC | Volume | Score |
---|---|---|---|---|
natural frequency of the earth | 1.4 | 1 | 1601 | 20 |
earth's natural frequency | 0.66 | 0.3 | 7683 | 21 |
what is the earth's natural frequency | 0.83 | 0.1 | 7302 | 47 |
what is the natural frequency of the earth | 0.76 | 1 | 4125 | 72 |
earth's natural frequency hz | 1.32 | 0.9 | 6803 | 4 |
earth's natural resonant frequency | 1.6 | 0.4 | 5242 | 78 |