| Autor: |
SHIMAMURA, HIDEKI, TOMODA, YOSHIBUMI, ASADA, TOSHI |
| Zdroj: |
Nature; January 1975, Vol. 253 Issue: 5488 p177-179, 3p |
| Abstrakt: |
THE Central Basin Fault of the Philippine Sea is proposed as an extinct mid-oceanic ridge1,2and seems to be a key to the development of the floor of the Philippine Sea. Though the fault seems to be aseismic on the basis of land networks, it is interesting to know whether microearthquakes occur in the vicinity of the fault. We put a sensitive ocean-bottom seismograph (OBS) in the median valley of the ridge (the width of which is only a few kilometres) and from its recordings have been able to deduce the existence of microearthquakes. It has also been possible to estimate P and S velocities for the top of the mantle and a Q structure for the upper mantle. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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