The velocity of P-waves below the " 20" discontinuity "
Velocity values for P-waves below the " 2 0 ° discontinuit y " are calculated by applying the Wadati-Masuda method, and by using separately calculated travel-time curves for the P-waves and the PdPwaves of each of the five earthquakes examined. The veloc...
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| Format: | Article |
| Language: | English |
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Istituto Nazionale di Geofisica e Vulcanologia (INGV)
1975-05-01
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| Series: | Annals of Geophysics |
| Online Access: | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4890 |
| _version_ | 1811211498116087808 |
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| author | B. FEDERICO |
| author_facet | B. FEDERICO |
| author_sort | B. FEDERICO |
| collection | DOAJ |
| description | Velocity values for P-waves below the " 2 0 ° discontinuit y " are calculated by applying the Wadati-Masuda method, and by using separately calculated travel-time curves for the P-waves and the PdPwaves of each of the five earthquakes examined. The velocities calculated have a mean value of 10.21 ± 0.24 km/sec, and are without exception greater than those obtained in a previous piece of research (9.57 km/sec). As regards the value of the velocity of the P-waves above the "20° discontinuity" (8.96 kin/sec), the percentage difference between the velocity above and the velocity below the "20° discontinuity" is 14%. Application of the Herglotz-Wiechert procedure in the zone of the mantle below the "20° discontinuity" does not give significant variations in the correlation between velocity and depth, in comparison with the results obtained by other authors. |
| first_indexed | 2024-04-12T05:14:12Z |
| format | Article |
| id | doaj.art-cbeb7c871bf34093831a93ae4c4f6ad5 |
| institution | Directory Open Access Journal |
| issn | 1593-5213 2037-416X |
| language | English |
| last_indexed | 2024-04-12T05:14:12Z |
| publishDate | 1975-05-01 |
| publisher | Istituto Nazionale di Geofisica e Vulcanologia (INGV) |
| record_format | Article |
| series | Annals of Geophysics |
| spelling | doaj.art-cbeb7c871bf34093831a93ae4c4f6ad52022-12-22T03:46:40ZengIstituto Nazionale di Geofisica e Vulcanologia (INGV)Annals of Geophysics1593-52132037-416X1975-05-01281456310.4401/ag-4890The velocity of P-waves below the " 20" discontinuity "B. FEDERICOVelocity values for P-waves below the " 2 0 ° discontinuit y " are calculated by applying the Wadati-Masuda method, and by using separately calculated travel-time curves for the P-waves and the PdPwaves of each of the five earthquakes examined. The velocities calculated have a mean value of 10.21 ± 0.24 km/sec, and are without exception greater than those obtained in a previous piece of research (9.57 km/sec). As regards the value of the velocity of the P-waves above the "20° discontinuity" (8.96 kin/sec), the percentage difference between the velocity above and the velocity below the "20° discontinuity" is 14%. Application of the Herglotz-Wiechert procedure in the zone of the mantle below the "20° discontinuity" does not give significant variations in the correlation between velocity and depth, in comparison with the results obtained by other authors.http://www.annalsofgeophysics.eu/index.php/annals/article/view/4890 |
| spellingShingle | B. FEDERICO The velocity of P-waves below the " 20" discontinuity " Annals of Geophysics |
| title | The velocity of P-waves below the " 20" discontinuity " |
| title_full | The velocity of P-waves below the " 20" discontinuity " |
| title_fullStr | The velocity of P-waves below the " 20" discontinuity " |
| title_full_unstemmed | The velocity of P-waves below the " 20" discontinuity " |
| title_short | The velocity of P-waves below the " 20" discontinuity " |
| title_sort | velocity of p waves below the 20 discontinuity |
| url | http://www.annalsofgeophysics.eu/index.php/annals/article/view/4890 |
| work_keys_str_mv | AT bfederico thevelocityofpwavesbelowthe20discontinuity AT bfederico velocityofpwavesbelowthe20discontinuity |