| 摘要 |
<p>Arrangement for short-term earthquake prediction by observation and measurement of seismic ground oscillations by means of ultrasonic sensors (11) sensitive to high-frequency oscillations in the range above approximately 20 kHz. These sensors are buried in the soil or connected to the latter and coupled with an evaluation apparatus (12) which enables the frequency and intensity of the oscillations of the sound source to be measured.</p> |
